15A, 28V, High Frequency Step-Down Converter with Synchronous Gate Driver

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Product Description

The MP38876 is a monolithic step-down switch mode converter with a built in internal power MOSFET. It achieves 15A 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 cycle?y?ycle current limiting and thermal shutdown. The MP38876 requires a minimum number of readily available standard external components and is available in a 20-pin 3mm x 4mm QFN package. The MP38876 is ideal for a wide range of applications including distributed power systems, pre-regulator for linear regulators, compact DC-DC regulators for PCB space limited platforms.


Product Features

  • Wide 4.5V to 28V Operating Input Range
  • 15A Output Current
  • 25mΩ Internal Power MOSFET Switch
  • Synchronous Gate Driver
  • Synch from 300kHz to > 1MHz External Clock or 400KHz Fixed Switching Frequency
  • Synch Output to Drive Another Regulator in Phase-Shift Operation
  • Feedback Voltage Accuracy: 2%
  • Programmable Soft-Start
  • Startup Tracking
  • EN and Power Good for Power Sequencing
  • Output Adjustable from 0.8V to 12V
  • Stable with Low ESR Output Ceramic Capacitors


  • fsw (max) (kHz)400
  • Vin (min) (V)4.5
  • Vin (max) (V)28
  • Iout (max) (A)15
  • Isw Limit (typ) (A)21
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.81
  • Iq (typ) (mA)1
  • Regulated Outputs1
  • Vout (max) (V)12
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-20 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync