General Description

The MAX1795/MAX1796/MAX1797 are high-efficiency, step-up DC-DC converters intended for small portable hand-held devices. These devices feature Maxim’s True Shutdown™ circuitry, which fully disconnects the output from the input in shutdown, improves efficiency, and eliminates costly external components. All three devices also feature Maxim’s proprietary LX-damping circuitry for reduced EMI in noise-sensitive applications. For additional in-system flexibility, a battery monitoring comparator (LBI/LBO) remains active even when the DC-DC converter is in shutdown.

Features

● > 95 Efficiency

● True-Shutdown Circuitry

• Output Disconnects from Input in Shutdown

• No External Schottky Diode Needed

● 25μA Quiescent Supply Current

● Low-Noise Antiringing Feature

● LBI/LBO Comparator Enabled in Shutdown

● 2μA Shutdown Current

● 8-Pin μMAX Package

Applications

● Portable Digital Audio Players

● PDAs/Palmtops

● Wireless Handsets

● Portable Terminals