7V, 5A, 1.1MHz Synchronous Step-down Converter

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Product Description

The MP28275 is a high frequency synchronous rectified step-down switch mode converter with built-in internal power MOSFETs. It offers a very compact solution to achieve 5A continuous output current with excellent load and line regulation. The MP28275 operates at high efficiency over a wide output current load range. Current mode operation provides fast transient response and eases loop stabilization. Full protection features include OCP and thermal shut down. The MP28275 requires a minimum number of readily available standard external components and is available in a space saving 3mm x 4mm 14-pin QFN package.


Product Features

  • 4.5V to 7V Operating Input Range
  • 5A Output Current
  • Low RDS(on) Internal Power MOSFETs
  • Proprietary Switching Loss Reduction Technique
  • Fixed 1.1MHz Switching Frequency
  • Sync from 300kHz to 2MHz External Clock
  • Internal Compensation
  • Thermal Shutdown
  • Over-Current-Protection and Hiccup
  • Output Adjustable from 0.8V
  • Available in a 3x4mm QFN14 Package


  • fsw (max) (kHz)1100
  • Vin (min) (V)4.5
  • Vin (max) (V)7
  • Iout (max) (A)5
  • Isw Limit (typ) (A)7
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.805
  • Iq (typ) (mA)1
  • Regulated Outputs1
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-14 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesPower Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync