Analog Devices MAX17558 Product Info

• Wide Range of Operation
  • Wide 4.5V to 60V Input Voltage Range
  • Wide 0.8V to 24V Output Voltage Range
  • R_SENSE or Inductor DCR Current-Sensing
  • Selectable In-Phase or 180° Out-of-Phase Operation
  • Adjustable 100kHz to 2.2MHz Switching Frequency
  • Independent Enable and PGOOD
  • Available in a Lead(Pb)-Free 32-Pin, 5mm x 5mm TQFN-EP Package
• Enhances Power Efficiency
  • Low Impedance Gate Drives for High Efficiency
  • DCM Operation at Light Loads
  • Auxiliary Bootstrap LDO
• Operates Reliably in Adverse Industrial Environments
  • Independent Adjustable Soft-Start or Tracking
  • Current Foldback Limits MOSFET Heat Dissipation During a Short-Circuit Condition
  • Operates Over the -40°C to +125°C Temperature Range
  • Output Overvoltage and Overtemperature Protections

The MAX17558 is a dual-output, synchronous step-down controller that drives nMOSFETs.

The device features a peak-current-mode, constant-frequency architecture, 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 also provides the ability to run two controllers 180° out-ofphase to reduce the power loss and noise due to the input-capacitor ESR.

The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback limits MOSFET power dissipation under short-circuit conditions.

The IC provides independent adjustable soft-start for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.

The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 32-pin TQFN, 5mm x 5mm package with an exposed pad.

Applications

• Computerized Numerical Control
• Distributed DC Power Systems
• Industrial Power Supplies
• Motion Control
• Programmable Logic Controllers