MAX17558
MAX17558 is Step-Down Controller manufactured by Maxim Integrated.
EVALUATION KIT AVAILABLE
60V, Dual-Output, Synchronous Step-Down Controller
General Description
The MAX17558 is a dual-output, synchronous step-down controller that drives n MOSFETs. The device uses a constant-frequency, peak-current-mode architecture.
The two outputs can be configured as independent voltage rails. Input capacitor size can be minimized by running the two outputs 180º out-of-phase.
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.
Applications
- - Industrial Power Supplies
- - Distributed DC Power Systems
- - Motion Control
- - Programmable Logic Controllers
- - puterized Numerical Control
Benefits and Features
- - 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 100k Hz to 2.2MHz Switching Frequency
- Independent Enable and PGOOD
- Available in a Lead(Pb)-Free 32-Pin, 5mm x 5mm TQFN Package
- - Enhances Power Efficiency
- Low Impedence 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...
