AEC1-Automotive Grade, High Efficiency, Force CCM Mode, 3A, 36V, Synchronous Step Down Converter with PG and Ext. Sync

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Product Description

The MPQ4423A is a high-efficiency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution that achieves 3A of continuous output current with excellent load and line regulation over a wide input supply range. The MPQ4423A uses synchronous mode operation to achieve higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include over-current protection (OCP) and thermal shutdown. The MPQ4423A requires a minimal number of readily available, standard, external components and is available in a compact QFN-8 (3mmx3mm) package.

Product Features

  • Wide 4V to 36V Continuous Operating Input Range
  • 85mO/55mO Low RDS(ON) Internal Power MOSFETs
  • High-Efficiency Synchronous Mode Operation
  • Default 410kHz Switching Frequency
  • Synchronizes to a 200kHz to 2.2MHz External Clock
  • High Duty Cycle for Automotive Cold Crank
  • Forced CCM Mode
  • Internal Soft Start
  • Power Good
  • Over-Current Protection (OCP) and Hiccup
  • Thermal Shutdown
  • Output Adjustable from 0.8V
  • Available in a QFN-8 (3mmx3mm) Package
  • Available in AEC-Q100 Grade 1


  • fsw (max) (kHz)410
  • Vin (min) (V)4
  • Vin (max) (V)36
  • Iout (max) (A)3
  • Vfb (V)0.79
  • Iq (typ) (mA)0.6
  • PGNo
  • GradeAutomotive
  • PackageQFN-8 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync