MP2309

Active
1A, 23V, 340KHz Synchronous Rectified Step-Down Converter with Soft Start


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Product Description

The MP2309 is a monolithic synchronous buck regulator. The device integrates 140mΩ MOSFETS that provide 1A continuous load current over a wide operating input voltage of 4.75V to 23V. Current mode control provides fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn-on. Shutdown mode drops the supply current to 1μA. This device, available in an 8-pin SOIC package, provides a very compact system solution with minimal reliance on external components.

Programmable

Product Features

  • 1A Output Current
  • Wide 4.75V to 23V Operating Input Range
  • Integrated 140mΩ Power MOSFET Switches
  • Output Adjustable from 0.923V to 20V
  • Up to 95% Efficiency
  • Programmable Soft-Start
  • Stable with Low ESR Ceramic Output Capacitors
  • Fixed 340kHz Frequency
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout

Parametrics

  • fsw (max) (kHz)340
  • Vin (min) (V)4.75
  • Vin (max) (V)23
  • Iout (max) (A)1
  • Isw Limit (typ) (A)2
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.923
  • Iq (typ) (mA)1.3
  • Regulated Outputs1
  • Vout (max) (V)20
  • Vout (min) (V)0.923
  • GradeCatalog
  • PackageSOIC-8
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Synchronous Rectification

Reference Materials