EVALUATION KIT AVAILABLE MAX17548 42V, Dual-Output, Synchronous Step-Down Controller General Description Benefits and Features The MAX17548 is a dual-output, synchronous step-down Wide Range of Operation controller that drives nMOSFETs. Wide 4.5V to 42V Input Voltage Range Wide 0.8V to 24V Output Voltage Range The device features a peak-current-mode, constant- R or Inductor DCR Current Sensing SENSE frequency architecture, allowing it to operate up to Selectable In-Phase or 180 Out-of-Phase 2.2MHz. The device can be configured as two single- Operation phase, independent 10A power supplies or as a dual- Adjustable 100kHz to 2.2MHz Switching Frequency phase, single-output 20A power supply. The device also Independent Enable and PGOOD provides the ability to run two controllers 180 out-of- Available in a Lead(Pb)-Free 32-Pin, 5mm x 5mm phase to reduce the power loss and noise due to the TQFN-EP Package input-capacitor ESR. Enhances Power Efficiency The IC supports current sensing using either an external Low-Impedance Gate Drives for High Efficiency current-sense resistor for accuracy or an inductor DCR DCM Operation at Light Loads for improved system efficiency. Current foldback limits Auxiliary Bootstrap LDO MOSFET power dissipation under short-circuit conditions. Operates Reliably in Adverse Industrial Environments The IC provides independent adjustable soft-start for Independent Adjustable Soft-Start or Tracking each output and can start up monotonically into a Current Foldback Limits MOSFET Heat Dissipation prebiased output. The IC can be configured in either During a Short-Circuit Condition PWM or DCM modes of operation, depending on whether Operates Over the -40C to +125C Temperature constant-frequency operation or light-load efficiency is Range desired. Output Overvoltage and Overtemperature Protections The IC operates over the -40C to +125C temperature range and is available in a lead(Pb)-free, 32-pin TQFN, Ordering Information appears at end of data sheet. 5mm x 5mm package with an exposed pad. Applications Industrial Power Supplies Distributed DC Power Systems Motion Control Programmable Logic Controllers Computerized Numerical Control 19-8778 Rev 0 2/17MAX17548 42V, Dual-Output, Synchronous Step-Down Controller Block Diagram Maxim Integrated 2 www.maximintegrated.com