100% Duty Cycle Synchronous 4A, 21V, 500kHz Step-Down Converter

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Product Description

The MP8715 is a 500 kHz fixed-frequency PWM synchronous step-down regulator. MP8715 operates from a 4.5V to 21V input and generates an output voltage form 0.8V to VIN with 100% duty cycle operation.  The MP8715 integrates a 120mΩ high-side switch and a 50mΩ synchronous rectifier for high efficiency without an external Schottky diode. It offers a very compact solution to achieve 4A continuous output current over a wide input supply range with excellent load and line regulation.  External soft start and power good indication meet flexible design requirement.  The MP8715 is available in a space saving 8-pin SOIC package with an exposed pad.


Product Features

  • 4A Output Current
  • Wide 4.5V to 21V Input Operation Range
  • 100% Duty Cycle Support
  • 120mΩ/50mΩ Internal Power MOSFET
  • All Ceramic Capacitor Design
  • Up to 95% Efficiency
  • 500kHz Fixed Switching Frequency
  • Adjustable Output from 0.8V to Vin
  • External Soft-Start
  • Frequency Synchronization Input
  • Power OK Indicator
  • Internal Compensation
  • Over Current Hiccup and Thermal Protection
  • 8-pin SOIC Package with an Exposed Pad


  • fsw (max) (kHz)500
  • Vin (min) (V)4.5
  • Vin (max) (V)21
  • Iout (max) (A)4
  • Isw Limit (typ) (A)7
  • Max Duty Cycle (%)1
  • Vfb (V)0.805
  • Iq (typ) (mA)0.66
  • Regulated Outputs1
  • Vout (max) (V)21
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-14 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good, Synchronous Rectification
  • Special Features100% Duty Cycle, External Frequency Sync

Reference Materials

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.