High Efficiency, Fast Transient, 3A, 20V Synchronous Step-down Converter with Programmable Frequency

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Product Description

The MP28258 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, and can operate 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 MP28258 requires a minimal number of readily-available standard external components. This device is available in a space saving 2mmx3mm 12-pin QFN package.


Product Features

  • Wide 4.2V to 20V Operating Input Range
  • 3A Output Current
  • Low RDS(ON) Internal Power Mosfets
  • Proprietary Switching Loss Reduction Technique
  • Power-Good Indicator in QFN Package
  • Soft Startup/Shutdown
  • Programmable Switching Frequency
  • SCP, OCP, UVP Protection and Thermal Shutdown
  • Optional OCP Protection: Latch-Off Mode and Hiccup Mode.
  • 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)3
  • Isw Limit (typ) (A)5
  • 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
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.