Create a design and simulate using EE-Sim tools: MAX17558ATJ+
The MAX17558ATJ+ 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.
Feature
- Wide Range of Operation
- Wide 4.5V to 60V Input Voltage Range
- Wide 0.8V to 24V Output Voltage Range
- RSENSE 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
Applications
- Computerized Numerical Control
- Distributed DC Power Systems
- Industrial Power Supplies
- Motion Control
- Programmable Logic Controllers
