General Description
The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to VIN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).

Features
♦ Fixed 5V or Adjustable Output
♦ 4.5V to 24V Input Voltage Range
♦ Up to 600mA Output Current
♦ Internal 0.4Ω P-Channel MOSFET
♦ Efficiency Over 95%
♦ 15µA Quiescent Supply Current
♦ 3µA Shutdown Current
♦ 100% Maximum Duty Cycle for Low Dropout
♦ Current-Limited Architecture
♦ Thermal Shutdown
♦ Small 8-µMAX Package

Applications
    Notebook Computers
    Distributed Power Systems
    Keep-Alive Supplies
    Hand-Held Devices