MP8642

Active
Dual 3A, 23V, 600kHz Step-Down Converter with Frequency Synchronization


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Product Description

The MP8642 is a dual monolithic step-down switch mode converter with built-in internal power MOSFETs. It achieves 3A continuous output current for each output 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 cycle?y?ycle current limiting and thermal shutdown. The MP8642 requires a minimum number of readily available standard external components.

Programmable

Product Features

  • 3A Current for Each Output
  • 80mΩ Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 95% Efficiency
  • Power Good Indicator
  • Fixed 600kHz Frequency
  • Synchronizable to >1MHz External Clock
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Wide 4.5V to 23V Operating Input Range
  • Each Output Adjustable from 0.8V to 20V
  • Available in a 5x5mm 32-Pin QFN

Parametrics

  • fsw (max) (kHz)600
  • Vin (min) (V)4.5
  • Vin (max) (V)23
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.808
  • Iq (typ) (mA)0.9
  • Regulated Outputs2
  • Vout (max) (V)20
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-32 (5x5)
  • Common FeaturesPower Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync