Compact Step-Up Converter Conserves Battery Power

摘要

The LT~®3464 is an ideal choice for portable devices which require a tiny, efficient and rugged step-up converter. The device, housed in a low profile (1 mm) 8-lead ThinSOT™ package, integrates a Schottky diode, NPN mainswitch and PNPoutputdisconnect switch. Forlight load efficiency, Burst Mode~® operation is used to deliver power to the load. This results in high efficiency and minimal battery current draw over a broad range of load current. Quiescent current is only 25μA While in shutdown, the output disconnect switch separates the load from the input, further increasing battery run time. This same feature reduces the fault current to 45mA (typ) when the output is shorted to ground, a feature that few boost converters offer.