Description

The MAX17558 is a dual-output, synchronous step-downcontroller that drives nMOSFETs.The device features a peak-current-mode, constant-frequencyarchitecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase,independent 10A power supplies or as a dual-phase,single-output 20A power supply. The device alsoprovides the ability to run two controllers 180° out-ofphaseto reduce the power loss and noise due to theinput-capacitor ESR.The IC supports current sensing using either an externalcurrent-sense resistor for accuracy or an inductor DCRfor improved system efficiency. Current foldback limitsMOSFET power dissipation under short-circuit conditions.The IC provides independent adjustable soft-start foreach output and can start up monotonically into aprebiased output. The IC can be configured in eitherPWM or DCM modes of operation, depending on whetherconstant-frequency operation or light-load efficiency isdesired.The IC operates over the -40°C to +125°C temperaturerange and is available in a lead(Pb)-free, 32-pin TQFN,5mm x 5mm package with an exposed pad.ApplicationsComputerized Numerical ControlDistributed DC Power SystemsIndustrial Power SuppliesMotion ControlProgrammable Logic Controllers