3A, 21V, 600kHz Step-Down Converter



The MP2377 is a monolithic step-down switch mode converter with a built in high-side power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes current limiting and thermal shutdown. The MP2377 requires a minimum number of readily available standard external components and is available in 8-pin SOIC packages with exposed pad.



  • Wide 4.5V to 21V Operating Input Range
  • 3A Output Current
  • 100mO Internal Power MOSFET Switch
  • Power Good Indicator
  • Fixed 600kHz Frequency
  • Synchronizable to >1MHz External Clock
  • Over Current Latch Off Protection
  • Thermal Shutdown
  • Output Adjustable from 0.8V to 15V
  • Stable with Low ESR Output Ceramic Capacitors
  • Available in Thermally Enhanced 8-Pin SOIC Packages
  • Supports Soft-Start into Pre-Biased Output


  • fsw (max) (kHz)600
  • 最小输入电压4.5
  • Vin (max) (V)21
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4
  • Max Duty Cycle (%)0.9
  • Vfb (V)0.808
  • Iq (typ) (mA)0.9
  • 额定输出1
  • Vout (min) (V)0.81
  • GradeCatalog
  • Common FeaturesPower Good
  • Special Features外部频率同步