The LTC3525-3/LTC3525-3.3/LTC3525-5 are high efficiency synchronous step-up DC/DC converters with output disconnect that can start up with an input as low as 0.85V. They offer 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 LTC3525 is offered in fixed output voltages of 3V, 3.3V or 5V.The device includes a 0.5Ω N-channel MOSFET switch and a 0.8Ω 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 <1μA shutdown current, antiringing control and thermal shutdown. The LTC3525 is available in a tiny 6-Lead SC70 package.List of LTC3525 OptionsPART NAMEINPUT START-UP VOLTAGEOUTPUT VOLTAGEVOUTSTATUS IN SHUTDOWN MODELTC3525-30.85V3VOutput DisconnectLTC3525-3.30.85V3.3VOutput DisconnectLTC3525-50.85V5VOutput DisconnectLTC3525D-3.30.85V3.3VPass Through ModeLTC3525L-30.7V3VOutput DisconnectApplicationsMP3 PlayersPortable InstrumentsGlucose MetersDigital Cameras