General Description
The MAX1875/MAX1876 dual, synchronized, step-down controller generates two outputs from input supplies ranging from 4.75V to 23V. Each output is adjustable from sub-1V to 18V and supports loads of 10A or higher. Input voltage ripple and total RMS input ripple current are reduced by synchronized 180° out-of-phase operation.

Features
♦ Two Independent Output Voltages
♦ 180° Out-of-Phase Operation
♦ 90° Out-of-Phase Operation (Using Two MAX1875/MAX1876s)
♦ Foldback Current Limit
♦ 4.75V to 23V Input Supply Range
♦ 0 to 18V Output-Voltage Range (Up to 10A)
♦ >90% Efficiency
♦ Fixed-Frequency Pulse-Width Modulation (PWM) Operation
♦ Adjustable 100kHz to 600kHz Switching Frequency
♦ External SYNC Input
♦ Clock Output for Master/Slave Synchronization
♦ Soft-Start and Soft-Stop
♦ RST Output with 140ms Minimum Delay (MAX1876)
♦ Lossless Current Limit (No Sense Resistor)

Applications
    Network Power Supplies
    Telecom Power Supplies
    DSP, ASIC, and FPGA Power Supplies
    Set-Top Boxes
    Broadband Routers
    Servers