LTC3525-3.3

LTC3525-3/ LTC3525-3.3/LTC3525-5 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect Features n Up to 95% Efficiency n Output Disconnect and Inrush Current Limit n Fixed Output Voltages of 3V, 3.3V or 5V n Delivers 65mA at 3V from a 1V Input n Delivers 60mA at 3.3V from a 1V Input, or 140mA at 3.3V from a 1.8V Input n Delivers 175mA at 5V from a 3V Input n Burst Mode® Operation: IQ = 7µA n Only Three External Components n VIN > VOUT Operation n <1µA Shutdown Current n Antiringing Control n Short-Circuit and Overtemperature Protection n Very Low Profile of 1mm n Tiny 6-Lead SC70 Package Applications n MP3 Players n Portable Instruments n Glucose Meters n Digital Cameras L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents pending. Description The LTC®3525-3/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 ran...