3A, 23V, 385kHz Asynchronous Step-Down Converter

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Product Description

The MP1583 is a step-down regulator with a built in internal Power MOSFET. It achieves 3A of 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 cycle­by­cycle current limiting and thermal shutdown. An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode the regulator draws 20μA of supply current. The MP1583 requires a minimum number of external components, providing a compact solution.


Product Features

  • 3A Output Current
  • Programmable Soft-Start
  • 100mΩ Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 95% Efficiency
  • 20μA Shutdown Mode
  • Fixed 385kHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Wide 4.75V to 23V Operating Input Range
  • Output Adjustable from 1.22V to 21V
  • Under Voltage Lockout


  • fsw (max) (kHz)385
  • Vin (min) (V)4.75
  • Vin (max) (V)23
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4.9
  • Max Duty Cycle (%)0.9
  • Vfb (V)1.222
  • Iq (typ) (mA)1
  • Regulated Outputs1
  • Vout (max) (V)21
  • Vout (min) (V)1.22
  • GradeCatalog
  • PackagePDIP8
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start

Reference Materials

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.