IC-Hersteller Maxim Integrated

IC-Hersteller (95)

Maxim Integrated MAX17559

42V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

Details

TopologieAbwärtswandler
Eingangsspannung4.5-60 V
Schaltfrequenz100-2200 kHz
Ausgang 15 V / 8 A
Ausgang 23.3 V / 15 A

Beschreibung

The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. The device uses a constant-frequency, peak-current-mode architecture. The two outputs can be configured as independent voltage rails. Input capacitor size is minimized by running the two outputs 180° 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 or latchoff limits MOSFET power dissipation under short-circuit conditions. The IC provides independent adjustable soft-start/stop 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, 7mm x 7mm, 32-pin TQFP, package.

Eigenschaften

  • 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
    • Fixed 180° Out-of-Phase Operation
    • Adjustable 100kHz to 2.2MHz Switching Frequency
    • Independent Enable and PGOOD
    • Available in a Lead(Pb)-Free 7mm x 7mm, 32-Pin TQFP 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/Stop or Tracking
    • Current Selectable Foldback or Latchoff Limits MOSFET Heat Dissipation During a Short-Circuit Condition
    • Operates Over the -40°C to +125°C Temperature Range
    • Output Overvoltage and Overtemperature Protections

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten