Analog Devices Ltd

MILPITAS, CA - September 21, 2016 - Linear Technology introduces the LTM8049, a dual output, two-function DC/DC µModule^® (power module) regulator in 15mm x 9mm x 2.42mm BGA package. One function is SEPIC (single-ended primary-inductor converter) in which the output voltage is regulated while the input voltage can vary to be less, equal or more than the value of the output voltage. The second function of the LTM8049 is an inverting conversion such that a positive input voltage is converted to a regulated negative output voltage. As a dual regulator, either output of the LTM8049 can be configured for a combination of SEPIC and/or inverting functions:

     (a) Output1: SEPIC, Output2: Inverting
     (b) Output1 & 2: SEPIC
     (c) Output1 & 2: Inverting

All that is needed to complete the design are input and output capacitors and few resistors, a total of 7 components compared to approximately 30 components needed to design a comparable discrete solution. PCB area for a solution using the LTM8049 is only 250mm². Example applications include battery-powered portable test systems, motor drivers and power for operational amplifiers in instrumentation devices.

The LTM8049 operates from 2.6V to 20V input, and each of the two output voltages range from ±2.5V to ±24V. The output current is 1A at 12VIN to 5VOUT, and can be increased by operating the device in parallel. The operating frequency, set via a single external resistor, ranges from 200kHz to 2.5MHz. The LTM8049 can be synchronized by an external clock within the same frequency range. The LTM8049 is available in a 9mm x 15mm x 2.42mm BGA package.

The LTM8049 operating temperature range is –40°C to 125°C. 1,000-piece pricing starts at $14.20 each. For more information, visit www.linear.com/product/LTM8049

Current 12V automotive systems are reaching their 3kW power limit due to the ever-increasing demand for more electrical devices. A newly proposed standard, LV 148, combines a secondary 48V bus with the existing 12V system. The 48V rail includes a belt starter generator or an integrated starter generator, a 48V lithium-ion battery and a bi-directional DC/DC converter for up to 10kW of available energy from the 48V and 12V batteries combined.

The LTC3871 provides the bi-directional control and battery charging between the 12V and 48V batteries. It operates in buck mode from the 48V bus to the 12V bus and in boost mode from 12V to 48V_.  Either mode is configured on demand with an applied control signal. Up to 12 phases can be paralleled and clocked out-of-phase to minimize input and output filtering for high current applications (up to 250A). Its advanced current-mode architecture provides excellent current matching between phases when paralleled. Up to 3kW can be supplied in buck mode or in boost mode with a 12-phase design.

When starting the car or when additional power is required, the LTC3871 allows both batteries to supply energy simultaneously by converting energy from one battery to the other. Typically, the 12V bus will continue to power the ignition, lighting, infotainment and audio systems. The 48V bus will supply active chassis systems, power steering, air conditioning compressors, electric superchargers/turbos and support regenerative braking. Up to 97% efficiency can be achieved and the onboard current programming loop regulates the maximum current that can be delivered to the load in either direction. Four control loops, two for current and two for voltage, enable control of voltage and current on either the 48V or 12V busses.

The LTC3871 has been qualified to meet AEC-Q100 specifications, moreover, the LTC3871 was designed with intrinsic safety being fully considered so that the device meets the ISO-26262 standard. The LTC3871 operates at a selectable fixed frequency between 60kHz and 475kHz, and can be synchronized to an external clock over the same range. Additional features include overload and short-circuit protection, ±1% voltage regulation accuracy over temp, along with undervoltage and overvoltage lockout.

Device Development Motivations

The LTC3871 was developed because we wanted a single bi-directional high current controller to step-down or step-up the voltage between the 12V and 48V automotive batteries.

Target Applications

• Automotive Internal Combustion Engines
• Hybrid Electric Vehicles
• Mild Hybrid Electric Vehicles

Key Technical Features

• Bi-directional Buck or Boost on Demand
• Unique Architecture Allows Regulation of the V_IN , V_OUT or Current
• 48V Nominal Bus, Up to 100V
• 12V Nominal Bus, Up to 30V
• AEC-Q100/ISO-26262 Qualified
• Up to 12 Phase Operation
• Synchronous Rectification: Up to 97% Efficiency
• Advanced Current Mode Control
• ±1% Reference Voltage Accuracy Over Temperature
• Programmable I_OUT Monitoring & Regulation for Both Buck and Boost Operation
• Selectable Buck and Boost Current Sense Limit
• Selectable Continuous or Discontinuous Operation
• Programmable DRVcc/EXTVcc Optimizes Efficiency
• Phase-Lockable Frequency: 60kHz to 475kHz
• Overload/Short-Circuit Protection
• Thermally Enhanced 48-Lead LQFP Package

MILPITAS, CA – September 20, 2016 – Linear Technology Corporation announces the LTC3871, a 100V/30V bidirectional two phase synchronous buck or boost controller, ideal for 48V/12V automotive dual battery systems. Current 12V automotive systems are reaching their 3kW power limit due to the ever-increasing demand for more electrical devices.  A newly proposed standard, LV148, combines a secondary 48V bus with the existing 12V system. The 48V rail includes a belt starter generator (BSG) or an integrated starter generator (ISG), a 48V lithium-ion battery and a bidirectional DC/DC converter for delivery of up to 10kW of available energy from the 48V and 12V batteries combined. This technology is targeted for conventional internal combustion automobiles, as well as hybrid electric and mild hybrid vehicles, as auto manufacturers strive to meet increasingly stringent CO₂ emissions targets.

According to Don Paulus, Vice President, Power Management Products for Linear Technology, “Running a portion of a vehicle’s electrical system at 48V will play a central role in increasing available energy, while reducing wiring harness weight and losses. This additional energy capacity paves the way for new technologies, enabling cars to be safer and more efficient, without compromising performance.”

The LTC3871 provides bidirectional DC/DC control and battery charging between the 12V and 48V boardnets. It operates in buck mode from the 48V bus to the 12V bus or in boost mode from 12V to 48V_.  Either mode is configured on demand with an applied control signal. Up to 12 phases can be paralleled and clocked out-of-phase to minimize input and output filtering requirements for high current applications (up to 250A). Its advanced current mode architecture provides excellent current matching between phases when paralleled. Up to 3kW can be supplied in buck mode or in boost mode with a 12-phase design.

When starting the car or when additional power is required, the LTC3871 allows both batteries to supply energy simultaneously by converting energy from one boardnet to the other. Typically, the 12V bus will continue to power the ignition, lighting, infotainment and audio systems. The 48V bus will supply active chassis systems, power steering, air conditioning compressors, electric superchargers/turbos and support regenerative braking. Up to 97% efficiency can be achieved and the on-chip current programming loop regulates the maximum current that can be delivered to the load in either direction. Four control loops, two for current and two for voltage, enable control of voltage and current on either the 48V or 12V boardnets.

The LTC3871 operates at a selectable fixed frequency between 60kHz and 460kHz, and can be synchronized to an external clock over the same range. The user can select from continuous operation or pulse-skipping during light loads. Additional features include overload and short-circuit protection, independent loop compensation for buck and boost, EXTV_CC for increased efficiency, ±1% voltage regulation accuracy over temp, along with undervoltage and overvoltage lockout. The LTC3871 has been qualified to meet AEC-Q100 specifications and was designed with intrinsic safety being fully considered in line with the ISO-26262 standard.

The LTC3871 is available in a thermally enhanced 48-lead LQFP package. Three temperature grades are available, with operation from –40°C to 125°C for the extended and industrial grades and a high temp automotive range of –40°C to 150°C. The 1,000-piece price starts at $5.40 each. For more information, visit www.linear.com/product/LTC3871.

Photo Caption: Bidirectional Buck or Boost DC/DC Controller

Summary of Features: LTC3871

• Buck or Boost on Demand
• Unique Architecture Allows Regulation of the Input Voltage, Output Voltage or Current
• 48V Nominal Bus, Up to 100V
• 12V Nominal Bus, Up to 30V
• AEC-Q100/ISO-26262 Complaint
• Up to 12-Phase Operation
• Synchronous Rectification: Up to 97% Efficiency
• Advanced Current Mode Control
• ±1% Reference Voltage Accuracy over Temperature
• Programmable Output Current Monitoring & Regulation for Both Buck & Boost Operation
• Selectable Buck and Boost Current Sense Limit
• Programmable DRV_CC/EXTV_CC Optimizes Efficiency
• Phase-Lockable Frequency: 60kHz to 460kHz
• Overload/Short-Circuit Protection
• Thermally Enhanced 48-Lead LQFP Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

About Linear Technology

Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule^® subsystems, and wireless sensor network products. For more information, visit www.linear.com

MILPITAS, CA - September 12, 2016 - Linear Technology Corporation introduces the LT4295IEEE 802.3bt powered device (PD) interface controller for applications requiring up to 71W of delivered power. The next Power over Ethernet (PoE) standard – IEEE 802.3bt – enables manufacturers to go beyond the 25.5W allocated by the 2009 IEEE 802.3at standard. Linear Technology is poised to be first to market with next-generation IEEE-compliant products. The new standard, also known as PoE++ or 4PPoE, increases the power budget to enable new applications and features, while supporting 10 Gigabit Ethernet (10GBASE-T) and maintaining backward compatibility with older IEEE equipment. The LT4295 is IEEE 802.3bt (Draft 2.0) compliant and supports newly introduced features, including all additional PD classes (5, 6, 7 and 8), additional PD types (Type 3 and Type 4), and 5-event classification.

The LT4295 is a single-signature 802.3bt PD controller that integrates an isolated switching regulator controller, capable of synchronous operation in both high efficiency forward and no-opto flyback topologies with auxiliary power support. This high level of integration simplifies front end PD designs by reducing component count and board space, allowing the LT4295 to efficiently deliver power to PD loads using just one IC. Unlike traditional PD controllers that integrate the power MOSFET, the LT4295 controls an external MOSFET to significantly reduce overall PD heat dissipation and maximize power efficiency, particularly important at 802.3bt’s higher power levels. An external MOSFET architecture allows users to size the MOSFET to their application’s requirements; standard LT4295-based implementations routinely select 30mΩ RDS(ON) MOSFETs.

The LT4295 is offered in industrial and automotive grades, supporting operating temperature ranges from –40°C to 85°C and –40°C to 125°C, respectively. The LT4295 is priced starting at $2.75 each in 1,000-piece quantities and is available in production quantities. The LT4295 provides an upgrade path from Linear Technology’s existing PoE+ PD controllers, including the LT4276 or LT4275. To further maximize available power and reduce heat dissipation in PDs, use the LT4321 ideal diode bridge controller. For more information, visitwww.linear.com/product/LT4295.

Summary of Features: LT4295

• IEEE 802.3af/at/bt (Draft 2.0) Powered Device (PD) with Forward/Flyback Controller
• External Hot Swap N-Channel MOSFET for Lowest Power Dissipation & Highest System Efficiency
• Supports Up to 71W PDs
• 5-Event Classification Sensing
• Superior Surge Protection (100V Absolute Maximum)
• Wide Junction Temperature Range (–40°C to 125°C)
• >94% End-to-End Efficiency with LT4321 Ideal Bridge
• No-Opto Flyback Operation
• Auxiliary Power Support as Low as 9V
• Available in 28-Lead 4mm x 5mm QFN Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

MILPITAS, CA - September 8, 2016 - Linear Technology Corporation introduces the LTM4650-1A and LTM4650-1B, dual 25A or single 50A µModule® (power module) regulators scalable to deliver 300A to high power, low voltage sub-28nm GPUs, FPGAs, ASICs and microprocessors. The low core voltage of these digital devices requires very accurate voltage regulation at both steady state (DC) and fast load current transients. The LTM4650-1A guarantees ±0.8% total DC voltage accuracy over reference, line, load and temperature (–40°C to 125°C), whereas the LTM4650-1B guarantees ±1.5%. Both devices can be optimized for ±3% or better total error band, including load step transients with a minimum number of ceramic capacitors to meet the core voltage window requirement of sub-28nm digital ICs.

Compared to competing power POL module regulators, the LTM4650-1A requires 60% less capacitance because of three main features (12VIN, 1VOUT, 0A to 25A load step, 25A/µs):

1. Guaranteed ±0.8% total DC voltage accuracy allows more margin (less capacitance) for the AC variation due to a load transient response to satisfy a given processor core voltage tolerance window.
2. The device can be externally adjusted (compensated) for optimum loop response to deliver load transients with fewer output capacitors. This enables use of important capacitors.
3. The device operates with phase interleaving, which reduces input and output current ripple, reducing the requirement for load capacitance.

The LTM4650-1 includes a dual output DC/DC regulator, inductors and MOSFETs in a 16mm x 16mm x 5.01mm BGA package. The LTM4650-1 regulates an output voltage ranging from 0.6V to 1.8V from an input voltage within 4.5V to 15V. Delivering 50A, 92% efficiency is recorded at 5VIN, 1.8VOUTand 86% at 12VIN, 1.0VOUT. The LTM4650-1 delivers the full 50A current up to 70°C ambient, from 12VIN to 1.0VOUT with 200LFM airflow. The LTM4650-1 can be operated in parallel to increase output current, up to six in parallel for 300A of output current. The LTM4650-1 is pin-compatible with the lower current LTM4630-1 (dual 18A or single 36A); so users can choose the correct part depending on load current without changing PCB layout.

The LTM4650-1 is rated for operation from –40°C to 125°C. 1,000-piece pricing starts at $46.75 each. For more information, visit www.linear.com/product/LTM4650-1.

Summary of Features: LTM4650-1

• ±0.8% Maximum Total DC Output Error Over Line, Load & Temperature (LTM4650-1A)
• ±3% Total Output Error with Minimum Output Capacitance, Including Transients
• Dual 25A or Single 50A Output
• 4.5V to 15V Input, 0.6V to 1.8V Output Voltage Range
• Differential Remote Sense Amplifier
• Current Mode Control/Fast Transient Response
• Current Sharing Up to 300A
• 16mm × 16mm × 5.01mm BGA Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

MILPITAS, CA - September 6, 2016 - Linear Technology Corporation introduces the LTC2947 power and energy monitor for 0V to 15V DC supply rails. Most power and energy monitoring ICs use an external sense resistor to measure current. However, choosing a sense resistor is not an easy task, especially when dealing with high currents, where available sense resistors can dissipate too much power, occupy a lot of board space or have a large impact on measurement accuracy. The LTC2947 integrates a 300µ¿ temperature-compensated sense resistor to alleviate these concerns, providing users with a simple 24mm2 solution that provides up to 1.2% accurate energy readings at up to ±30A. When measuring a full-scale current of 30A, the voltage drop over the LTC2947’s integrated sense resistor is only about 9mV, causing power dissipation of approximately a quarter watt or about 10mW when measuring a 6A rail. In addition to low power dissipation, the LTC2947 offers high dynamic range due to its low offset of only 6mA (or 1.8µV).

Three integrated Δ∑ ADCs and an internal or external precision time base (crystal or clock) enable accurate measurement of multiple parameters, including current, voltage, power, charge, energy, temperature and time. All digital readings, including minimum and maximum values, are stored in registers accessible by a selectable I²C or SPI interface. An alert signal notifies the host when measurements exceed configurable warning thresholds, eliminating burdensome polling. The LTC2947 provides access to all the necessary parameters to accurately assess and manage board level energy consumption, and its rail-to-rail operating range is ideal for monitoring current levels during short-circuit or blackout situations without additional circuitry.

MILPITAS, CA - September 1, 2016 - Linear Technology Corporation introduces the LTC4420, a dual input monolithic power prioritizer for 1.8V to 18V systems. To enable portability, preserve memory during brownouts, and ensure a graceful shutdown on power loss, electronic systems employ batteries and capacitors for backup power. The LTC4420 normally powers the load from the higher priority main supply such as a wall adapter or battery, switching to the backup supply—typically a battery or large-value capacitor—during primary brownout or power loss conditions. With up to 18V operating capability, the LTC4420 accommodates a wide range of power sources such as wall adapters, USB ports, supercapacitors, and stacked batteries with Li-Ion, alkaline or NiMH cells. By reducing device operating current to 3.6µA and the backup supply’s standby current drain to a low 0.32μA, the LTC4420 extends run time in portable battery-operated systems.

Unlike other solutions, the LTC4420 does not require the backup supply voltage to be lower than the main supply voltage. When the backup supply voltage is higher than the main supply voltage, a prioritizer is a better solution than a simple diode-OR as the prioritizer does not necessarily draw current from the highest voltage supply. Internal 500mA (min) current-limited switches multiplex from the primary to the backup supply when the primary voltage falls below the adjustable switchover threshold. Carefully designed break-before-make fast switch control blocks reverse and cross conduction currents while minimizing output voltage droop. To reduce quiescent current, the backup supply’s resistive divider is connected to a strobed ground with a duty cycle that is adjustable down to a low 0.0015%, and an optional undervoltage disconnect prevents deeply discharged batteries. A freshness seal mode further lowers standby current to 0.12µA, minimizing battery discharge during product storage and shipment. Reversed-battery voltages up to −15V are blocked from propagating to the load.

Specified over the 0°C to 70°C commercial and −40°C to 85°C industrial temperature ranges, the LTC4420 is offered in thermally enhanced 12-pin MSOP and 3mm x 3mm DFN packages. 1,000-piece pricing starts at $2.95 each. Device samples and evaluation circuit boards are available online or from your local Linear Technology sales office. For more information, visit www.linear.com/product/LTC4420

MILPITAS, CA - August 31, 2016 - Linear Technology Corporation introduces the LTC4013, a highly integrated, high voltage multi-chemistry synchronous step-down battery charger controller. With a wide input voltage range that spans up to 60V, the LTC4013 uses temperature-compensated 3- and 4-stage charge algorithms to efficiently charge 12V and 24V lead-acid batteries. Alternatively, the LTC4013 will charge a multicell Lithium-based battery stack with float voltages near to the input supply. Mode pins define the float voltage and charge algorithm. Charge current is precision regulated to ±5% and programmable with a single resistor up to 20A (depending on the selection of external components). The LTC4013 features user-adjustable maximum power point tracking (MPPT) circuitry that enables simple power optimization in the case of power-limited sources such as solar panels. The MPPT open-circuit method corrects for panel temperature changes without the inconvenience of adding a solar panel temperature sensor. Applications include portable medical instruments, monitoring equipment, battery backup systems, industrial handhelds, industrial lighting, military equipment, ruggedized notebooks/tablet computers, plus remote powered communication and telemetry systems.

The LTC4013 utilizes N-channel MOSFETs for high efficiency charging, and features a wide battery charge voltage range of 0V to 60V. The main charging features of the product can be adjusted using pin-strap configurations and programming resistors, enabling the user to select between several predefined charging algorithms depending on battery chemistry. For lead-acid battery types such as vented, sealed and gel, the LTC4013 supports multiple charging stages, including float, programmable-timed absorption and equalization. Each charge voltage includes adjustable temperature compensation. For Li-Ion/Polymer cells, the device offers a constant-current/constant-voltage charging algorithm. The SYNC input provides the ability to synchronize the switching frequency to an external clock to avoid noise in a particular frequency range or to target noise filters to a specific frequency. Other product features include an external input MOSFET driver (INFET) to avoid battery discharge during an input supply short, two open-drain status pins, and an ISMON pin that provides analog information about charge current.

The LTC4013 is housed in a compact 28-lead 4mm x 5mm QFN package with an exposed metal pad for excellent thermal performance. E- and I-grade devices are guaranteed for operation from –40C to 125C. 1,000-piece pricing starts at $3.95 each for the E-grade and devices are available from stock. For more information, visit www.linear.com/product/LTC4013

MILPITAS, CA – August 16, 2016 – Linear Technology Corporation announces the LTC3623, a ±5A high efficiency, current mode synchronous buck regulator that is adjustable from 14.5V down to 0V output with a single resistor. Proven on Linear Technology’s prior linear regulators and switching regulators, this innovative architecture uses a 50µA current reference, combined with a single resistor, to set the output voltage. Its unique design enables easy current sharing between multiple regulators, setting the output voltage for all of the regulators with a single external resistor. The LTC3623’s bipolar ±5A sink and source capability, wide VIN and VOUT capability, current mode control for tight line and load regulation, high efficiency, low external parts count and parallel capability make it ideal for modern multirail systems, in addition to tracking supplies, ASIC substrate biasing, DDR memory supplies, point-of-load power supplies, portable instruments, distributed power supply systems, battery-powered equipment and thermo electric cooler systems.

The LTC3623’s wide 4V to 15V input voltage range is ideal for dual-cell Li-Ion applications, and fixed 5V and 12V intermediate bus systems. Low RDS(ON) integrated N-channel power MOSFETs and synchronous rectification deliver efficiencies as high as 96%. The device’s novel design allows dynamic adjustment of output voltage from 0V to VIN – 0.5V, offering virtually rail-to-rail performance. The LTC3623’s ability to sink up to 5A down to 0VOUT enables it to power down individual rails in the system as needed. Its on-chip trimmed reference achieves high accuracy of ±1%. Furthermore, output regulation and transient response are independent of output voltage. The user can directly drive the LTC3623’s ISET pin with an external voltage supply to program the converter’s VOUT. Additionally, output voltage tracking or soft-start is easily programmed via the ISET pin for applications that require power sequencing.

The LTC3623’s 400kHz to 4MHz switching capability enables the use of tiny, low cost capacitors and inductors, and combined with its compact QFN package, offers a very compact solution footprint for multirail applications. Additional device features include: programmable wire drop compensation, an input supply voltage regulation loop for extracting power from high impedance sources such as solar panels, an output current monitor, a power good voltage monitor, external synchronization capability and thermal protection.

The LTC3623 is available in a thermally enhanced, 24-lead 3mm x 5mm QFN package, with both E and I grades specified for an operating junction temperature of –40°C to 125°C. Devices are in stock, and pricing for the E grade starts at $3.95 each in 1,000-piece quantities. For more information, visit www.linear.com/product/LTC3623.

Summary of Features: LTC3623

• Single Resistor Programmable VOUT: 0V to VIN – 0.5V
• ISET Accuracy: ±1%
• Tight VOUT Regulation Across VOUT Range
• Output Current Monitor Accuracy: ±5%
• Programmable Wire Drop Compensation
• Easy to Parallel for Higher Current & Heat Spreading
• Input Supply Voltage Regulation Loop
• High Efficiency: Up to 96%
• Output Current: ±5A
• Integrated Power N-MOSFETs (60mΩ Top & 30mΩ Bottom)
• Adjustable Switching Frequency: 400kHz to 4MHz
• VIN Range: 4V to 15V
• Current Mode Operation for Excellent Line & Load Transient Response
• Shutdown Mode Draws Less Than 1µA Supply Current
• Thermally Enhanced, 24-Lead 3mm × 5mm QFN Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

MILPITAS, CA - August 15, 2016 - Linear Technology Corporation introduces the LTM4631, a dual 10A or single 20A µModule® (power module) step-down regulator in an ultrathin 1.91mm LGA package with a 16mm x 16mm footprint. The LTM4631 can be placed on a PC board very close to its load such as an FPGA, while sharing one heat sink covering both of their low profile packages. The small, thin package permits the LTM4631 to be mounted on the backside of circuit boards, freeing space on the topside for components such as DDR-QDR memory and transceiver ICs. Examples of applications include plug-in and mezzanine cards in embedded systems, data storage systems, gateway controllers and 40Gbps to 100Gbps networks.

The LTM4631 operates from 4.5V to 15V input supplies and regulates an output voltage from 0.6V to 1.8V with ±1.5% maximum total DC output voltage error from –40°C to 125°C. Its two outputs operate 180° out-of-phase, each capable of delivering 10A or 20A when the outputs current share. Two devices can current share, delivering up to 40A while minimizing input and output ripple current. The device features output overcurrent foldback and overvoltage protection. The LTM4631 is rated for operation from –40°C to 125°C. 1,000-piece pricing starts at $24.88 each. For more information, visit www.linear.com/product/LTM4631.

Summary of Features: LTM4631

• 1.91mm Ultrathin 16mm x 16mm LGA Dual 10A or Single 20A µModule® Regulator
• Wide Input Voltage Range: 4.5V to 15V
• Output Voltage Adjustable with Resistor from 0.6V to 1.8V
• Overvoltage & Overcurrent Protection

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

MILPITAS, CA - August 11, 2016 - Linear Technology Corporation announces the LTC3256, a highly integrated, high voltage low noise dual output power supply, which takes a single positive input and generates 5V and 3.3V step-down supplies with high efficiency and no inductors. The device features a wide 5.5V to 38V input voltage range and includes independently enabled dual outputs: a 5V 100mA supply, and a 250mA 3.3V low-dropout (LDO) regulator, for a total of 350mA available output current. This combination of regulators offers much lower power dissipation than a dual-LDO solution. For example at 12V VIN and maximum load on both outputs, power dissipation is decreased by over 2W with the LTC3256, thus reducing significant heat and input current. The LTC3256 is engineered for diagnostic coverage in ISO26262 systems and incorporates numerous safety and system monitoring features. The device is well-suited for a variety of applications requiring low noise, low power rails from a high voltage input such as automotive ECU/CAN transceiver supplies, industrial/telecom housekeeping supplies, and general-purpose low-power 12V to 5V and 3.3V conversion.

The LTC3256 maximizes efficiency by running the charge pump in 2:1 mode, over as wide an operating range as possible, and automatically switches to 1:1 mode as needed, consistent with VIN and load conditions. Controlled input current and soft switching minimize conducted and radiated EMI. The device offers low quiescent current of only 20μA with both outputs regulating (no load) and 0.5μA in shutdown. The integrated watchdog timer, independent power good outputs and reset input ensure reliable system operation and enable fault monitoring. A buffered 1.1V reference output enables system self-testing diagnostics for safety critical applications. The LTC3256 also has additional safety features including overcurrent fault protection, overtemperature protection and tolerance of 38V input transients.

The LTC3256 is available in a thermally enhanced 16-lead MSOP package, with a backside thermal pad. The E- and I-grade operating junction temperature range is –40°C to 125°C, the H grade operates from –40°C to 150°C, and the MP grade operates from –55°C to 150°C. Devices are in stock, priced starting at $2.95 each for the E-grade. For more information, visit www.linear.com/product/LTC3256.

Summary of Features: LTC3256

• Input Voltage Range: 5.5V to 38V
• Independently Enabled 5V & 3.3V Fixed Outputs
• 5V Output: 100mA Max
• 3.3V LDO Output: 250mA Max
• Multi-Mode Step Down Charge Pump (2:1, 1:1) with Automatic Mode Switching
• Low Quiescent Current
• 20μA with Both Outputs Regulating (No Load)
• <0.5μA in Shutdown
• Engineered for ISO26262 Diagnostic Coverage in Systems
• 1.1V Reference Output for System Diagnostics
• Power-On Reset & Watchdog Controller with Adjustable Timing
• Overcurrent Fault Protection on Each Output
• Overtemperature Protection
• 150°C Max Operating Junction Temperature
• Thermally Enhanced 16-Lead MSOP Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

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About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule® subsystems, and wireless sensor network products. For more information, visit www.linear.com.

MILPITAS, CA - August 1, 2016 - Linear Technology Corporation introduces the LTC2508-32, an ultrahigh precision 32-bit successive approximation register (SAR) analog-to-digital converter (ADC). Many high performance applications, including data acquisition, industrial control and medical instrumentation, require both accuracy and speed. This is often achieved by using a high resolution delta-sigma ADC and a high speed SAR ADC in the same system. The LTC2508-32 simplifies such hybrid ADC system design by simultaneously providing both a 32-bit low noise digitally filtered output and a 14-bit 1Msps no latency output. Since these outputs are generated from a single 32-bit SAR ADC core, the high accuracy and high speed outputs are perfectly matched, even as the operating temperature, supply and stress vary. In contrast to traditional solutions employing two distinct unmatched ADCs, the unique combination of both accuracy and speed in the LTC2508-32 enables much higher system performance while reducing solution size and lowering component count.

The LTC2508-32 is ideal for applications that simultaneously require precision measurement and fast tracking of signals. The exceptional 3.5ppm guaranteed maximum linearity, together with up to 145dB of dynamic range, enables the LTC2508-32 to make precision measurements in the presence of noise. Simultaneously, the high speed 1Msps output provides a 14-bit differential and 8-bit common mode representation of the input signal, enabling sophisticated control loop designs with early detection mechanisms. The LTC2508-32 further improves system accuracy while simplifying signal conditioning design by directly digitizing the input signal over the full input range with over 120dB of common mode rejection.

The LTC2508-32 features an integrated digital filter that can be configured to optimize the 32-bit high accuracy output’s noise performance and bandwidth, up to a maximum 145dB of dynamic range at an output data rate of 61sps. The integrated digital filter offers a minimum 80dB attenuation of out-of-band noise, relaxing analog anti-aliasing filter requirements and significantly reducing system complexity. The reduced data rate of the digitally filtered output also eases communication with slow processors.

The LTC2508-32 dissipates 24mW of power from a single 2.5V supply. The LTC2508-32 is available today in a space saving 7mm × 4mm 24-lead DFN package. Pricing for the LTC2508-32 starts at $8.95 each in 1,000-piece quantities. Samples and demo boards may be requested at www.linear.com/product/LTC2508-32, or by contacting your local Linear Technology sales office.

Summary of Features: LTC2508-32

• ±0.5ppm INL (Typ)
• 145dB Dynamic Range (Typ) at 61sps
• 131dB Dynamic Range (Typ) at 4ksps
• Guaranteed 32-Bit No Missing Codes
• Configurable Digital Filter with Synchronization
  • Relaxed Anti-Aliasing Filter Requirements
• Dual Output 32-Bit SAR ADC
• 32-Bit Digitally Filtered Low Noise Output
• 14-Bit Differential + 8-Bit Common Mode 1Msps No Latency Output
• Wide Input Common Mode Range
• 1.8V to 5V SPI-Compatible Serial I/O
• Low Power: 24mW at 1Msps

24-Lead (7mm × 4mm) DFN Package

MILPITAS, CA – July 27, 2016 – Linear Technology introduces a new high linearity I/Q demodulator, the LTC5586, with more than 1GHz, –1dB flatness bandwidth, supporting

next-generation 5G wireless infrastructure equipment such as DPD (digital predistortion correction) receivers for base stations, microwave backhaul and software-defined radios (SDR), as well as other broadband receiver applications. The LTC5586’s RF input port is truly broadband. With a single network, it is 50Ω matched from 500MHz to 6GHz, covering all the LTE bands as well as the emerging 4.5G and 5G bands at 3.6GHz and 5GHz. For operation from 300MHz to 500MHz, an additional capacitor does the job. The device also has built-in SPI tunability, allowing the demodulator to set its LO input to any frequency band from 300MHz to 6GHz with no external matching components. The new demodulator supports very high OIP2 of 80dBm and 60dBc sideband suppression, ensuring superior receiver performance.

The LTC5586 is a true zero-IF design that demodulates wideband RF signals directly to baseband DC or low IF coupling. The demodulator exploits the quadrature relationship between the two I and Q channels, sufficiently containing all the information available when both channels are sampled at one-half the bandwidth of the full RF bandwidth from which they came. As a result, the A/D converters’ (ADC) sampling rate and cost can be reduced.

In the front end, the LTC5586 has an RF switch that selects one of its two inputs to a programmable attenuator via the on-chip serial bus. This front end attenuator has a gain control range of 31dB in 1dB steps, allowing the receiver to accommodate a wide range of signal inputs. The demodulator consists of I and Q mixers, with their respective LO driven by an accurate wideband quadrature phase shifter. After the signal is demodulated, two programmable gain amplifiers provide gains to the I and Q baseband signal paths. Maximum gain of 7.7dB can be set by the serial port in 1dB steps, allowing users to optimally set the signal levels while driving a pair of external A/D converters directly.

Additionally, the LTC5586 has a unique on-chip tuning facility for simple calibration via the SPI serial port. Through this interface, the user can adjust the I and Q amplitude and phase balance, resulting in a much simplified calibration to attain unprecedented 60dBc or better image rejection performance. The same interface can optimize the IIP2, IIP3, HD2 (2nd harmonic distortion) and HD3 performance, improving the overall linearity performance of a receiver. With the device’s baseband DC coupled, its DC offset voltage can be zeroed, including the entire baseband signal chain, so long as the combined total offset is within the adjustment range of the LTC5586.

The LTC5586 comes in a 5mm x 5mm plastic QFN package. The I and Q outputs are able to drive directly into a pair of interstage filters and external ADCs when terminated externally with a 100¿ differential impedance. This results in a compact solution, requiring few external components. Operating temperature range is specified from –40°C to 105°C case. The LTC5586 is priced starting at $7.79 each in 1,000-piece quantities and is now available in production quantities. For more information, visit www.linear.com/product/LTC5586.

Summary of Features: LTC5586

• Ultra-Wide Bandwidth                      DC to 1GHz
• Operating Frequency Range         300MHz to 6GHz
• Image Rejection (Adjusted)           70dBc at 3.5GHz
• OIP3 at 3.5GHz                                  +35dBm
• OIP2 at 3.5GHz (Adjusted)                 +70dBm
• Maximum Power Gain at 1.9GHz            7.7dB
• SPI Serial Bus Tunable Performance:
• Image Rejection (I & Q Amplitude & Phase Balance)
• IIP2 & IIP3 Performance
• HD2 & HD3 Performance
• DC Offset Null
• LO Frequency Match
• RF Front-End Attenuator and RF Switch Control
• IF Gain Control

MILPITAS, CA - July 21, 2016 - Linear Technology announces the LTC6433-15, a wideband 15dB gain block amplifier offering outstanding linearity of 47dBm OIP3 (output third order intercept) and 3.22dB noise figure at 150MHz. The amplifier has excellent OP1dB (output 1dB compression point) of 19.2dBm. The LTC6433-15 is uniquely different from other gain block amplifiers that are typically built using GaAs or pHEMT processes. These FET technologies have high 1/f noise corners on the order of 20MHz to 30MHz, so are prone to high noise floor rise, which renders them unusable at low frequencies. In contrast, the LTC6433-15 amplifier core is built using high frequency SiGe bipolar technology. As a result, the amplifier exhibits much lower 1/f noise corner, typically below 10kHz, making it usable at low frequencies to 100kHz without significant noise rise. Moreover, the performance of GaAs and pHEMT type devices is highly dependent on their internal FET bias voltage, which can vary widely from part to part. Not so with the LTC6433-15, whose performance is stable over temperature and from device to device, and is insensitive to power supply voltage variations.

The LTC6433-15’s low frequency capability broadens its use and improves performance in a wide range of amplifier applications, including cable networks, broadband signal sources, radar receiver IF amplifiers, VHF/UHF broadcast radios and RF test instrumentation. The LTC6433-15 offers a superior alternative to many op amp solutions in amplifier applications that do not require DC coupling.

The LTC6433-15 input and output are 50Ω wideband matched from 100kHz to 1GHz with 1dB flatness over that frequency range. It has a –3dB bandwidth of 1.4GHz. The amplifier needs only an input and output DC blocking capacitor, plus a choke to bias its open collector output, and one feedback capacitor to set the matching and gain flatness at low frequencies. Hence, the LTC6433-15 simplifies wideband design and allows easy cascading with minimal external components. The DC2168A evaluation circuit demonstrates this performance, covering the 100kHz to 1GHz band with flat gain, low noise and industry leading distortion performance

Wideband Ultralow Distortion
15dB Gain Block

The LTC6433-15 operates from a single 5V supply. It draws a nominal 95mA supply current. The device is specified for operation over a case temperature range of –40°C to 85°C. The amplifier is available in a 4mm x 4mm plastic QFN package. The guaranteed performance A-grade version is priced starting at $4.89 each, and the B-grade version starting at $1.89 each in 1,000-pieces quantities. Both are available from stock. For more information, visit www.linear.com/product/LTC6433-15.

MILPITAS, CA - June 30, 2016 - Linear Technology introduces the LTM8003, a step-down DC/DC µModule® regulator with a 40V input voltage rating (42V abs max) and 3.5A of continuous (6A peak) output current. The LTM8003’s pinout is FMEA (failure mode effects analysis) compliant, so the output voltage stays at or below the regulation voltage in the event of short-circuit to GND, short-circuit to a neighboring pin or if a pin is left floating. The maximum junction temperature of the H-grade version is 150°C, ideal for high temperature or high power automotive and industrial applications.

The LTM8003 operates from an input voltage range of 3.4V to 40V and has an adjustable output voltage range of 0.97V to 18V. The switching frequency is adjustable via an external resistor or can be synchronized to an external clock from 200kHz to 3MHz. The LTM8003 has four operation modes: Burst Mode® operation, pulse skip mode, pulse skip mode with spread spectrum and external synch mode. The quiescent current in Burst Mode operation is 25µA (max), so the LTM8003 is well suited for battery operated systems, specifically “keep alive” systems.

The efficiency at 12VIN to 3.3VOUT is 90% and the LTM8003 delivers 3.5A of output current up to 100°C ambient without a heat sink or airflow. The LTM8003 includes a switching regulator, inductor and other supporting components in a 6.25mm x 9mm x 3.32mm BGA package. Only the bulk input and output capacitors and a few resistors are required to complete the design.

The LTM8003 is operational from -40°C to 125°C or -40°C to 150°C. 1,000-piece pricing starts at $11.30 each. For more information, visit www.linear.com/product/LTM8003

Summary of Features: LTM8003

• Wide Input Voltage Range:
• 3.4V to 40V
• Wide Output Voltage Range:
• 0.97V to 18V
• 3.5A Continuous Output Current (6A Peak)
• FMEA Compliant Pinout
• 150°C Maximum Operating Temperature (H-Grade)
• Selectable Switching Frequency:
• 200kHz to 3MHz
• External Synchronization
• Low Quiescent Current = 25µA
• Programmable Soft-Start
• 6.25mm x 9mm x 3.32mm BGA Package

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

About Linear Technology

Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule® subsystems, and wireless sensor network products. For more information, visit www.linear.com.

MILPITAS, CA - June 15, 2016 - Linear Technology introduces over 53 µModule^® (micromodule) power products with SnPb BGA packages, targeting applications where the use of tin-lead soldering is preferred, such as in defense, avionics and heavy equipment industries. A µModule point-of-load regulator with SnPb BGA package simplifies PC board assembly for suppliers in these industries by providing:

• Surface mount vs through-hole PCB assembly.
• Complete, encapsulated DC/DC regulator circuit in one BGA package vs high component-count, unverified discrete solution.
• 100% tested point-of-load regulator solutions vs requiring verification and supervision of discrete circuit point-of-load regulator solutions.
• Simpler cleaning under the µModule BGA package due to higher standoff compared to flat LGA or QFN packages.
• Reflow temperature identical to the other tin-lead components on the PCB vs higher temperature required for point-of-load regulators with Pb-free solder paste.

µModule power products with SnPb BGA packages are offered in four DC/DC converter categories: (1) step-down or buck converters with single and multiple outputs, (2) buck-boost converters, (3) isolated converters, and (4) converters with PMBus digital telemetry with READ and WRITE data capability.

Pb-free (SAC305) versions of these devices and more than 100 µModule products in both BGA and LGA packages are available at www.linear.com/umodule.

A summary of SnPb BGA µModule power products is provided by clicking here or at http://lt.linear.com/00w

MILPITAS, CA – May 23, 2016 – Linear Technology Corporation announces the LTC3895, a high voltage non-isolated synchronous step-down switching regulator controller that drives an all N-channel MOSFET power stage. Its 4V to 140V (150V abs max) input voltage range is designed to operate from a high input voltage source or from an input that has high voltage surges, eliminating the need for external surge suppression devices. The LTC3895 continues to operate at up to 100% duty cycle during input voltage dips down to 4V, making it well suited for transportation, industrial control, robotic and datacom applications.

The output voltage can be set from 0.8V to 60V at output currents up to 20amps with efficiencies as high as 96%. This part draws only 40µA in sleep mode with the output voltage in regulation, ideal for always-on systems. An internal charge pump allows for 100% duty cycle operation in dropout, a useful feature when powered from a battery during discharge. The LTC3895’s powerful 1¿ N-channel MOSFET gate drivers can be adjusted from 5V to 10V to enable the use of logic- or standard-level MOSFETs to maximize efficiency. To prevent high on-chip power dissipation in high input voltage applications, the LTC3895 includes an NDRV pin which drives the gate of an optional external N-channel MOSFET acting as a low dropout linear regulator to supply IC power.  The EXT_VCC pin permits the LTC3895 to be powered from the output of the switching regulator or other available source, reducing power dissipation and improving efficiency.

The LTC3895 operates with a selectable fixed frequency between 50kHz and 900kHz and is synchronizable to an external clock from 75kHz to 850kHz. The user can select from forced continuous operation, pulse-skipping or low ripple Burst Mode^® operation during light loads. Its current mode architecture provides easy loop compensation, fast transient response and excellent line regulation. Current sensing is accomplished by measuring the voltage drop across the output inductor (DCR) for highest efficiency or by using an optional sense resistor. A low 80ns minimum on-time allows for high step-down ratios at high switching frequency. Current foldback limits MOSFET heat dissipation during overload conditions. Additional features include a fixed 5V or 3.3V output option, integrated bootstrap diode, a power good output signal, adjustable input overvoltage lockout and soft-start.

The LTC3895 is available in a TSSOP-38 thermally enhanced package with several pins removed for high voltage spacing. Two operating junction temperature grades are available with extended and industrial versions from –40 to 125°C and a high temp automotive version from      –40°C to 150°C. The 1,000-piece price starts at $4.70 each. For more information, visit www.linear.com/product/LTC3895.

Photo Caption: 150V Synchronous Step-Down Controller

Summary of Features: LTC3895

• Wide Input Voltage Range: 4V to 140V, (150V Abs Max)
• Wide Output Voltage Range: 0.8V to 60V
• Output Current up to 20 Amps
• Synchronous Rectification for up to 96% Efficiency
• Low 40µA Quiescent Current
• 100% Duty Cycle Capability
• Adjustable 5V-10V Gate Drive Voltage for Logic-Level or Standard Threshold MOSFETs
• DCR or R_SENSE Current Sense
• Low 80ns Minimum On-Time for High Step-Down Ratios
• Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode^® Operation at Light Loads
• Selectable Fixed Operating Frequency from 50kHz to 900kHz
• PLL Synchronizable Operating Frequency from 75kHz to 850kHz
• Current Mode Control for Fast Transient Response & Easy Loop Compensation
• Power Good Output Signal
• Adjustable Input Overvoltage Lockout

Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.

The LTC3895 is a high voltage non-isolated synchronous step-down switching regulator controller that drives an all N-channel MOSFET power stage. It operates over a 4V to 140V (150V abs max) input voltage range. The output voltage can be set from 0.8V to 60V at output currents up to 20 amps with efficiencies as high as 96%. The device draws only 40µA in sleep mode with the output voltage in regulation, ideal for always-on systems. An internal charge pump allows for 100% duty cycle operation in dropout, a useful feature for both surge stopping and powering from a battery during discharge. The LTC3895’s powerful 1¿ N-channel MOSFET gate drivers can be adjusted from 5V to 10V to enable the use of logic- or standard-level MOSFETs to maximize efficiency.

Device Development Motivations

The LTC3895 was developed because we wanted a non-isolated DC/DC controller with a high input voltage capability that can eliminate the need for bulky Surge Suppression devices and operate continuously with a high input voltage

Target Applications

• Automotive and Industrial Power Systems
• High Voltage Battery Operated Systems
• Telecommunications Power Systems

Key Technical Features

• Wide V_IN Range: 4V to 140V (150V Abs Max)
• Wide Output Voltage Range: 0.8V to 60V
• Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)
• Low Operating I_Q: 40μA (Shutdown = 10μA)
• 100% Duty Cycle Operation
• No External Bootstrap Diode Required
• On-board LDO or External NMOS LDO for DRV_CC
• EXTV_CC LDO Powers Drivers from V_OUT
• Phase-Lockable Frequency (75kHz to 850kHz)
• Programmable Fixed Frequency (50kHz to 900kHz)
• Selectable Continuous, Pulse Skipping or Low Ripple

Burst Mode Operation at Light Loads

• Adjustable or Fixed (5V/3.3V) Output Voltage
• Power Good Output Voltage Monitor
• TSSOP (9.7MM x 6.4mm) Package with High Voltage Spacing

MILPITAS, CA - May 19, 2016 - Linear Technology Corporation announces the LT8304, a monolithic flyback regulator that significantly simplifies the design of isolated DC/DC converters. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no opto-isolator or third winding for regulation. The LT8304 operates over a 3V to 100V input voltage range, has a 2A/150V integrated DMOS power switch and delivers up to 24 watts of output power, making it well suited for a wide variety of telecom, datacom, automotive, industrial, medical and military applications.

The LT8304 operates in boundary mode, which is a variable frequency current mode control switching scheme, typically resulting in ±5% output voltage regulation over the full line, load and temperature range. Boundary mode enables the use of a smaller transformer compared to equivalent continuous conduction-mode designs. The output voltage is easily set by two external resistors and the transformer turns ratio. Several off-the-shelf transformers, identified in the data sheet, can be used for numerous applications. The high level of integration and the use of low ripple Burst Mode^® operation result in a simple to use, low component count and high efficiency solution for isolated power delivery.

Additional features include output short-circuit protection, 116µA no load operating quiescent current, accurate enable and undervoltage lockout with hysteresis, internal soft start and loop compensation, along with output diode temperature compensation.

The LT8304 is available in a small thermally enhanced SO-8 package. Extended and industrial versions operate over a junction temperature range of -40°C to 125°C. Pricing starts at $3.55 each in 1000-piece quantities. For more information, visit www.linear.com/product/LT8304.

Summary of Features: LT8304

• V_IN Range from 3V to 100V
• Up to 24 Watts of Output Power
• Onboard 2A, 150V Integrated DMOS Power Switch
• Off-the-Shelf Power Transformers
• No Opto-Isolator or Transformer Third Winding Required for Voltage Feedback
• 116µA Quiescent Current
• Boundary Mode Operation
• V_OUT Set with Two External Resistors
• Accurate Input Enable & Undervoltage Lockout with Hysteresis
• Output Diode Temperature Compensation
• Extended & Industrial Grades:
  -40°C to 125°C Operating Junction Temp

MILPITAS, CA - April 26, 2016 - Linear Technology Corporation introduces the LTM4642, a dual 4A or single 8A step-down µModule^® (power module) regulator in a compact 9mm x 11.25mm x 4.92mm BGA package. The device operates from a wide input voltage range of 2.375V to 20V and regulates two output voltages adjustable from 0.6V to 5.5V. Each output is a synchronous buck converter operating at high efficiency. The operating efficiencies for delivering full current at a 1.8V load from input supplies of 12V, 5V and 3.3V are 88%, 91% and 93%, respectively.

The two 4A outputs can be current shared as a single 8A output with precision voltage regulation of ±1.5% over line and load variations and is guaranteed from -40°C to 125°C. The LTM4642’s small footprint, high efficiency and dual-regulator design enables system designers to reduce PCB area or fit this point-of-load regulator into tight spaces on densely populated boards. Applications for the LTM4642 include industrial, robotic, medical, instrumentation and telecom systems.

The LTM4642 can be synchronized to a supplied clock with a frequency ranging from 600kHz to 1.4MHz. Output ripple voltage is reduced because of the device’s 180° out-of-phase operation. Low package thermal impedance enables full load current up to 95°C ambient temperature with no airflow and 100°C with 200LFM when converting 12V to a 1V output.

The LTM4642 operates from -40°C to 125°C. The 1,000-piece price is $19.43 each. For more information, visit www.linear.com/product/LTM4642.

MILPITAS, CA - April 25, 2016 - Linear Technology Corporation introduces the LTC4380, an ultralow quiescent current (I_Q) surge stopper, providing compact overvoltage and overcurrent protection for always-on 4V to 72V electronics in automotive, industrial and avionic systems. The LTC4380 replaces traditional shunt circuits composed of bulky inductors, capacitors, transient voltage suppressors (TVS), and fuses with a simple IC and series N-channel MOSFET solution, saving board space and enabling continuous operation through transient voltage or current surges. The LTC4380 protects downstream electronics from input overvoltage up to the MOSFET rating, while also protecting the power supply from output overload. Device current consumption is a mere 8µA in normal operation and 6µA in shutdown mode, prolonging battery run and standby time. The low current allows a large filtering resistor to the device supply pin, enabling operation through automotive cold crank and overvoltage transients above 100V.

During an input voltage surge, such as automotive load dump, the LTC4380 drops the excess voltage across the external MOSFET while clamping its gate and therefore the output to a safe voltage. This enables the use of lower voltage rated electronics downstream, saving costs. The clamp voltage is pin-selectable for 12V and 24V systems, or adjustable with an input Zener diode. During an output overload or short-circuit, the LTC4380 regulates the forward path to a current limit set by a sense resistor. For sustained overvoltage or overcurrent conditions, a MOSFET stress-accelerated timeout ensures safe turn-off of the MOSFET. In contrast, traditional protection circuits may blow a fuse or burn out the TVS, requiring repairs.

The LTC4380 withstands a reversed input, such as an incorrectly inserted battery, to -60V. Adjustable input undervoltage lockout threshold blocks start-up for out-of-range voltages, avoiding deeply discharged batteries. The device also controls inrush current during hot plug of a circuit board’s power supply.

The LTC4380 is available in four options: the LTC4380-1 and LTC4380-2 have a pin-selectable clamp voltage, whereas the LTC4380-3 and LTC4380-4 clamp voltage is set with an input Zener diode. After a fault, the LTC4380-1 and LTC4380-3 latch the MOSFET off, while the LTC4380-2 and LTC4380-4 automatically turn on with a 0.1% duty cycle. Specified over the 0°C to 70°C commercial, -40°C to 85°C industrial and -40°C to 125°C automotive temperature ranges, the LTC4380 is offered in 10-pin MSOP and 3mm x 3mm DFN packages. 1,000-piece pricing starts at $2.48 each. Device samples and evaluation circuit boards are available online or from your local Linear Technology sales office. For more information, visit www.linear.com/product/LTC4380.

Hannover, Germany, April 25, 2016 - Scienlab will present its engineering services and products for the entire development chain of battery management systems (BMS) at Hannover Messe, Linear Technology Stand H23, Hall 9.

In addition to its energy storage test system for characterization of cells, Scienlab will also present a BMS test environment for BMS development and validation, as well as newly developed Module Monitoring Electronics using Linear Technology’s LTC6804 multicell battery monitor.

The LTC6804 is a 3rd generation multicell battery stack monitor that measures up to 12 series-connected battery cells with a total measurement error of less than 1.2 mV. The cell measurement range of 0 V to 5 V makes the LTC6804 suitable for most battery chemistries. With six programmable 3rd order low pass filter settings, the LTC6804 data acquisition rate and noise reduction can be optimized for the application. In the fastest ADC mode, the LTC6804 can measure all 12 cells within 290 µs.

The BMS development at Scienlab is based on the proven V-model, which comprises the phases of design, implementation and testing.

BMS design

Alongside its own BMS, Scienlab also offers specific tailor-made solutions for customer applications. For this purpose, the company determines the necessary BMS functions taking into account the individual customer application, compliance with applicable standards and safety requirements. Specifications are then defined for development as well as the software and hardware.

Implementation of BMS software and hardware

Scienlab offers complete model-based software development including code generation in MATLAB/Simulink. This simplifies ideal parameterization of the BMS for the cells used, and thus ensures optimum capacity utilization and maximum durability of the connected cells.

Since the purely statistical values from the battery datasheet are not sufficient for optimum BMS design, cells are characterized with Scienlab’s energy storage test system in order to determine the required parameters. Non-linear effects are also included here, such as the interdependencies of temperature, current or state of charge.

For model-based development, Scienlab also has a model-based test environment. In this environment, the BMS software can be tested at very early stages of development with the aid of cell models and simulation of the other BMS peripheral devices (e.g., charger). Scienlab also realizes the corresponding BMS hardware for the specific customer application.

BMS validation with Scienlab test systems

The BMS is validated with the Scienlab BMS test environment. Using various emulators that simulate the cells, current and temperature sensors and insulation resistances, reproducible, safe and reliable BMS tests are carried out without the need for real components such as battery cells.

Interfaces with real-time capability permit fast data transfer (1 kHz) between the test systems and the hardware-in-the-loop system. The voltage measuring accuracy of up to ± 0.2 mV and current measuring accuracy of up to ± 2 µA ensure exact voltage and current adjustment and therefore optimum emulation of the cell characteristics. Highly dynamic bidirectional voltage sources permit voltage jumps in less than 80 µs.

Hannover, Germany, April 25, 2016 - Norwegian company Vicotee AS, part of the Virinco Group, announces the release of Vicotee - a wireless mesh Internet of Things (IoT) sensor interface which utilizes SmartMesh IP^™ from Linear Technology Corporation.

Launching officially at Linear Technology’s booth H23-Hall 9 at the Hannover Fair 2016 Exhibition, this innovative IoT solution provides a vast array of opportunities for increased control and efficiency of physical infrastructure, made possible through the collection of data by sensors that can be located practically anywhere. The Vicotee IoT product is a flexible and complete solution which interfaces with sensor hardware and cloud-based reporting dashboards, where data is analyzed and smart sensors can be configured over the air in real-time.

Based on WATS - Virinco’s global quality and big data test management suite - the Vicotee product is an off-the-shelf solution that will enable companies and public services to connect with traditional wired sensors over the Internet through a single wireless network. This is made possible through the use of Linear Technology’s SmartMesh^® wireless sensor network technology, which provides low power, standards-based radio technology, time diversity, frequency diversity, and physical diversity to assure reliability, scalability, wire-free power source flexibility and ease-of-use.

Any operation can now connect a multitude of standard sensor devices using the Vicotee hardware interface, allowing businesses to transport short technical messages, such as instructions, control commands, conditional responses, measurements, metered data and various other types of information.

Vicotee can be used wherever sensors are installed for monitoring purposes. Whether it is building automation, environmental monitoring, offshore, green energy, smart cities, healthcare, hospitals or homes, the Vicotee network solution offers more than 99.999% network reliability even in the most challenging RF environments - equivalent to cabled network reliability!

Designed as a ‘plug & play’ system, Vicotee consists of wireless nodes, gateways, cloud services (APIs) and web based reporting tools, which can be delivered as a standalone package or integrated into third party solutions. Its nodes are developed for high efficiency and low power consumption, allowing batteries to last for 10 years. These standard nodes will support most sensor protocols out of the box.

Hannover, Germany, April 25, 2016 - VersaSense will present live demonstrations of its award-winning MicroPnP product range at Hannover Messe, Linear Technology Stand H23, Hall 9. MicroPnP is based on SmartMesh IP^™ embedded networking and uses Internet of Things (IoT) technologies to realize zero-configuration wireless sensing and actuation at a significantly lower price point than traditional wired solutions.

MicroPnP is a complete IoT hardware and software platform that dramatically reduces the total cost of ownership for sensing and control systems. MicroPnP provides a unique value proposition:

• True plug-and-play identification of sensors and actuators at 10 million times lower power than USB.
• Ultra-reliable networking through SmartMesh IP^™ from Linear technology (>99.999% end-to-end reliability).
• Industry-grade security from the embedded sensor to the cloud.
• A decade of battery lifetime, with accurate real time tracking of energy reserves across the entire network.
• Flexible usage models: integrate MicroPnP in your network through ‘sensing as a product’, or consume data through ‘sensing as a service’.

These features have been achieved through a decade of industrial and academic research. MicroPnP won third place in the 2015 IPSO challenge and was nominated for the 2016 IoT hardware awards.

MILPITAS, CA - April 14, 2016 - Linear Technology introduces the LTM4632, a triple output µModule (power module) regulator for powering all three voltage rails of the new QDR4 and older DDR SRAM: VDDQ, VTT and VTTR (or VREF). Housed in a miniature, lightweight, ultrathin LGA package (6.25mm x 6.25mm x 1.82mm), the LTM4632 can be soldered on the backside of the PCB, and with one resistor and three capacitors it occupies only 0.5cm² (dual-sided) or 1cm² (single-sided). Capable of delivering 3A VDDQ and ±3A VTT (=1/2*VDDQ) two LTM4632s in parallel can provide up to 6A per rail for larger memory banks. For more than 6A VDDQ, the LTM4632 can be configured with the LTM4630 to provide between 18A and 36A VDDQ for very large arrays of SRAMs. If VDDQ is already available, the LTM4632 can be configured to supply a two-phase single VTT output up to 6A.

The LTM4632 can operate from a low input supply of 3.3V, as well as standard 5V and 12V inputs (up to 15V). Each of the two output voltages (VDDQ and VTT) range from 0.6V to 2.5V. The third output is a low noise 10mA buffered output for VTTR of the SRAM. Applications include PCIe, cloud-based systems, RAID, video processing and networking using these SRAMs: DDR/DDR-II/DDR-III/DDR4/QDR/QDR-II/QDR-II+ and QDR4.

The LTM4632 contains a triple output DC/DC regulator, divide by 2 circuit, power switches, inductors and support components in a compact, ultrathin package. The LTM4632 is rated for operation from -40°C to 125°C. 1,000-piece pricing starts at $7.35 each for E-grade and $8.09 each for I-grade. For more information, visit www.linear.com/product/LTM4632.