General Description
The MAX8529 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. Input voltage ripple and total RMS input ripple current are reduced by synchronized 180-degree out-ofphase operation.

Features
♦ Low Output Noise in DSL Band
♦ Ceramic Input/Output Capacitors
♦ Step-Down or Step-Up/Step-Down Operation
♦ Four Output, 90-Degree Out-of-Phase Operation (Using Two MAX8529s)
♦ Foldback Current Limit
♦ 4.75V to 23V Input Supply Range
♦ 0 to 18V Output Voltage Range (Up to 6A)
♦ > 90% Efficiency
♦ Fixed-Frequency PWM Operation
♦ Adjustable 600kHz to 1.5MHz Switching Frequency
♦ External SYNC Input
♦ Clock Output for Master/Slave Synchronization
♦ Soft-Start and Soft-Stop
♦ RST Output with 140ms Minimum Delay
♦ Lossless Current Limit (No Sense Resistor)

Applications
    xDSL Modems and Routers
    DSP, ASIC, and FPGA Power Supplies
    Set-Top Boxes
    Broadband Routers