High Efficiency, Fast-Transient, 3A, 4.2V-20V Input Synchronous Step-down Converter with SS and Programmable Frequency in a QFN12 (2x3mm) Package



The MP28248 is a fully-integrated, high-efficiency, synchronous, step-down, switch mode converter. It offers a very compact solution that can achieve a 3A continuous output current over a wide input supply range with excellent load and line regulation. The MP28248 operates at high efficiency over a wide output-current load range.  Constant-On-Time control mode provides fast transient response and eases loop stabilization.  Full protective features include short-circuit protection, over-current protection, over-voltage protection, under-voltage protection, and thermal shutdown.  The MP28248 requires a minimal number of readily-available standard external components.  This device is available in a space-saving 2mmx3mm 12-pin QFN package.



  • Wide 4.2V to 20V Operating Input Range
  • 3A Output Current
  • Low RDS(ON) Internal Power MOSFETs
  • Proprietary Switching-Loss Reduction Technique
  • Soft Startup/Shutdown
  • Programmable Switching Frequency
  • SCP, OCP, UVP, OVP, and Thermal Shutdown
  • Output Adjustable from 0.815V to 13V
  • Available in a QFN12 (2mmx3mm) Package


  • 最小输入电压4.2
  • Vin (max) (V)20
  • Iout (max) (A)3
  • Isw Limit (typ) (A)5
  • Vfb (V)0.815
  • Iq (typ) (mA)0.44
  • 额定输出1
  • Vout (max) (V)13
  • Vout (min) (V)0.815
  • GradeCatalog
  • PackageQFN-12 (2x3)
  • Control ModeCOT
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Synchronous Rectification
  • Special FeaturesProgrammable Frequency, Soft Stop