High Efficiency, Fast Transient, 2A, 4.2V-20V Input Synchronous, Step-down Converter

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Product Description

The MP28259 is a fully integrated, high efficiency synchronous rectified step-down switch mode converter. It offers a very compact solution to achieve 2A continuous output current over a wide input supply range with excellent load and line regulation. The MP28259 operates at high efficiency over a wide output current load range. Constant-On-Time (COT) control mode provides fast transient response and eases loop stabilization. Full protection features include SCP, OCP, OVP, UVP and thermal shut down. The MP28259 requires a minimum number of readily available standard external components and is available in a space saving pin QFN12 (2x3mm) package.


Product Features

  • Wide 4.2V to 20V Operating Input Range
  • 2A Output Current
  • Low Rds(on) Internal Power MOSFETs
  • Proprietary Switching Loss Reduction Technique
  • Power Good Indicator in QFN Package
  • Soft Shutdown
  • Programmable Switching Frequency
  • OCP, SCP, OVP, UVP Protection and Thermal Shutdown
  • Output Adjustable from 0.815V to 13V
  • Available in a QFN12 (2x3mm) Package


  • fsw (max) (kHz)0
  • Vin (min) (V)4.2
  • Vin (max) (V)20
  • Iout (max) (A)2
  • Isw Limit (typ) (A)4
  • Vfb (V)0.815
  • Iq (typ) (mA)0.36
  • Regulated Outputs1
  • Vout (max) (V)13
  • Vout (min) (V)0.815
  • GradeCatalog
  • PackageQFN-12 (2x3)
  • Control ModeCOT
  • Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesProgrammable Frequency

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.