3A, 28V, 1.4MHz Step-Down Converter



The MP2365 is a 1.4MHz step-down regulator with a built-in 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-by-cycle current limiting and thermal shutdown. Adjustable soft-start reduces the stress on the input source at turn-on. In shutdown mode, the regulator draws 20μA of supply current. The MP2365 is available in an 8-pin SOIC package with an exposed pad, and requires a minimum number of readily available external components to complete a 3A step-down DC to DC converter solution.



  • 3A Continuous Output Current, 4A Peak Output Current
  • Programmable Soft-Start
  • 100mΩ Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 91% Efficiency
  • 20μA Shutdown Mode
  • Fixed 1.4MHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Wide 4.75V to 28V Operating Input Range
  • Output is Adjustable From 0.92V to 21V
  • Under Voltage Lockout


  • fsw (max) (kHz)1400
  • 最小输入电压4.75
  • Vin (max) (V)28
  • Iout (max) (A)3
  • Isw Limit (typ) (A)6.5
  • Max Duty Cycle (%)0.65
  • Vfb (V)0.92
  • Iq (typ) (mA)1.3
  • 额定输出1
  • Vout (max) (V)21
  • Vout (min) (V)0.92
  • GradeCatalog
  • PackageSOIC-8N
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start