MP28259 Hiccup Version. 2A, 4.2V to 20V, COT, Sync Step-Down Converter with Programmable Frequency



The MP28259 is a fully-integrated synchronous, rectified, step-down switch mode converter with programmable frequency. It offers a very compact solution that can achieve a 2A 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 MP28259 requires a minimal number of readily-available standard external components.  The device is available in a space saving 2mmx3mm 12-pin QFN package.



  • 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
  • Optional OCP Protection: Latch-Off Mode and Hiccup Mode
  • Output Adjustable from 0.815V to 13V
  • Available in a QFN12 (2mmx3mm) Package


  • fsw (max) (kHz)0
  • 最小输入电压4.2
  • Vin (max) (V)20
  • Iout (max) (A)2
  • Isw Limit (typ) (A)4
  • Vfb (V)0.815
  • Iq (typ) (mA)0.36
  • 额定输出1
  • 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
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