General Description

The MAX8594/MAX8594A complete power-management chips for low-cost personal digital assistants (PDAs) operates from a 1-cell lithium-ion (Li+) or 3-cell NiMH battery. They include all regulators, outputs, and voltage monitors necessary for small portable devices while requiring a bare minimum of external components. Featured are three linear regulators, a boost DC-DC converter for LCD bias, an efficient 4MHz buck DC-DC converter for core power, a microprocessor (µP) reset output, and low-battery shutdown in a 0.8mm high thin QFN package.

Features

♦ Minimum External Components

♦ Efficient Step-Down DC-DC Powers CPU Core

♦ 1V/1.3V Selectable Core Voltage, 400mA (MAX8594)

♦ 1.3V/1.8V Selectable Core Voltage, 400mA (MAX8594A)

♦ Main LDO 3.3V, 500mA

♦ SD Card Output 3.3V, 500mA

♦ Second Core LDO 1.8V, 50mA

♦ High-Efficiency LCD Boost

♦ LCD 0V True Shutdown when Off

♦ 46µA Quiescent Current

Applications

    PDAs

    Organizers

    Cellular and Cordless Phones

    MP3 Players

    Handheld Devices