General Description
The MAX1774 is a complete power-supply solution for PDAs and other hand-held devices. It integrates two high-efficiency step-down converters, a boost converter for backup battery regulation, and four voltage detectors in a small 32-pin QFN or 28-pin QSOP package.

Features
♦ Dual, High-Efficiency, Synchronous-Rectified Step-Down Converters
♦ Thin, Small (1mm High) QFN Package
♦ Step-Up Converter for Backup Battery
♦ Main Power
    Adjustable from +1.25V to +5.5V
    Over 2A Load Current
    Up to 95% Efficiency
♦ Core Power
    Adjustable from 1V to 5V
    Internal Switches
    Up to 1.5A Load Current
    Up to 91% Efficiency
♦ Automatic Main Battery Switchover
♦ 100% (max) Duty Cycle
♦ Up to 1.25MHz Switching Frequency
♦ Input Voltage Range from +2.7V to +28V
♦ Four Low-Voltage Detectors
♦ 170µA Quiescent Current
♦ 8µA Shutdown Current
♦ Digital Soft-Start
♦ Independent Shutdown Inputs

Applications
    Hand-Held Computers
    PDAs
    Internet Access Tablets
    POS Terminals
    Subnotebooks