MP38891

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6A, 30V, 420KHz Step-Down Converter with Synchronizable Gate Driver



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Product Description

The MP38891 is a monolithic step-down switch mode converter with a built in internal power MOSFET. It achieves 6A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle­by­cycle current limiting and thermal shutdown. The MP38891 requires a minimum number of readily available standard external components and is available in a space saving 3mm x 4mm 14-pin QFN package.

Programmable

Product Features

  • Wide 4.5V to 42V Operating Input Range
  • 6A Output Current
  • 50mΩ Internal Power MOSFET Switch
  • Synchronizable Gate Driver Delivers up to 95% Efficiency
  • Fixed 420kHz Frequency
  • Synchronizable up to 1.4MHz
  • Cycle-by-Cycle Over Current Protection
  • Thermal Shutdown
  • Output Adjustable from 0.8V to 15V
  • Stable with Low ESR Output Ceramic Capacitors
  • Available in a Thermally Enhanced 3x4mm 14-Pin QFN Package

Parametrics

  • fsw (max) (kHz)420
  • Vin (min) (V)4.5
  • Vin (max) (V)30
  • Iout (max) (A)6
  • Isw Limit (typ) (A)8
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.808
  • Iq (typ) (mA)0.9
  • Regulated Outputs1
  • Vout (max) (V)15
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-14 (3x4)
  • Common FeaturesPower Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync