MP38876

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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 cycle­by­cycle 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.

Programmable

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

Parametrics

  • 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
  • 封装QFN-20 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good, Synchronous Rectification
  • 特性External Frequency Sync

Reference Materials