20V, 6A Synchronous, Step-Down Converter with External Soft Start and Programmable Frequency



The MP9186 is a synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 6A continuous output current over a wide input supply range with excellent load and line regulation. The MP9186 has synchronous mode operation for higher efficiency over the output current load range. Current-mode operation provides a fast transient response and eases loop stabilization. Full protection features include over-current protection and thermal shutdown. The MP9186 requires a minimal number of readily-available standard external components and is available in a space saving 3mm×3mm 14-pin QFN package.



  • Wide 4.5V-to-20V Operating Input Range
  • 6A Output Current
  • Low RDS(ON) Internal Power MOSFETs
  • Programmable Switching Frequency
  • Programmable EN Delay
  • Frequency SYNC from 300kHz to 2MHz External Clock
  • Low Power Mode Selectable by an External Signal
  • External Soft Start
  • OCP and Thermal Shutdown
  • Available in a 14-pin 3x3mm QFN Package


  • fsw (max) (kHz)2000
  • 最小输入电压4.5
  • Vin (max) (V)20
  • Iout (max) (A)6
  • Isw Limit (typ) (A)9.4
  • Max Duty Cycle (%)0.95
  • Vfb (V)0.798
  • Iq (typ) (mA)0.8
  • 额定输出1
  • Vout (max) (V)18
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-14 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Synchronous Rectification
  • Special Features外部频率同步, Programmable Frequency
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