3A, 23V, 380KHz Step-Down Converter



The MP2355 is a step-down regulator with a built in internal 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 cycle?y?ycle current limiting and thermal shutdown. Adjustable soft-start reduces the stress on the input source at turn-on. In shutdown mode the regulator draws 20? of supply current. The MP2355 uses a minimum number of readily available external components to complete a 3A step-down DC to DC converter solution.\



  • Programmable Soft-Start
  • 100mΩ Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 95% Efficiency
  • 20μA Shutdown Mode
  • 3A Output Current
  • Wide 4.75V to 23V Operating Input Range
  • Fixed 380kHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Under Voltage Lockout


  • fsw (max) (kHz)380
  • 最小输入电压4.75
  • Vin (max) (V)23
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4.3
  • Max Duty Cycle (%)0.9
  • Vfb (V)1.222
  • Iq (typ) (mA)1
  • 额定输出1
  • GradeCatalog
  • PackageSOIC-8N
  • Common FeaturesExternal Soft Start