The LTC®3525D-3.3 is a high efficiency synchronous stepup DC/DC converter that can start up with an input as low as 0.85V. It offers a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline or Li-Ion applications. Only three small external components are required. The LTC3525D features a fixed output voltage of 3.3V. In shutdown, VOUT is connected to VIN through the inductor. The device includes a 0.5O N-channel MOSFET switch and a 0.8O P-channel synchronous rectifier. Peak switch current ranges from 150mA to 400mA, depending on load, providing enhanced efficiency. Quiescent current is an ultralow 7ΜA, maximizing battery life in portable applications. Other features include anti-ringing control and thermal shutdown. The LTC3525D is available in a tiny 6-pin SC70 package.
