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LTC3525L-3 - 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

The LTC3525L-3 is a high efficiency synchronous step-up DC/DC converter with output disconnect that can start up with an input as low as 0.7V. It offers a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline applications. Only three small external components are required. The LTC3525L-3 generates a fixed 3V output voltage.

The device includes a 0.5 N-channel MOSFET switch and a 0.85 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 LTC3525L-3 is available in a tiny 6-pin SC70 package.

Features Start-Up at 0.7V Typical, 0.88V Guaranteed Up to 95% Efficiency Output Disconnect and Inrush Current Limit 3V Fixed Output Voltage Delivers 65mA at 3V from a 1V Input or 160mA from a 1.8V Input Burst Mode® Operation: IQ = 7μA VIN: 0.5V to 4.5V Only Three External Components VIN > VOUT Operation <1μA Shutdown Current Anti-Ringing Control Short-Circuit and Overtemperature Protection Tiny 6-Pin SC70 Package Typical Application

Applications MP3 Players Portable Instruments Glucose Meters Digital Cameras Packaging

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