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MPS MPQ4430 - synchronous step-down converter

The MPQ4430 is a frequency programmable (350k to 2.5MHz) synchronous step-down switching regulator with integrated internal highside and low-side power MOSFETs. It provides a 3.5A (or less) highly efficient output with current mode control for fast loop response.

The wide 3.3V to 36V input range accommodates a variety of step-down applications in automotive input environments. A 1μA shutdown mode quiescent current allows use in battery-powered applications.

High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency during a light-load condition to reduce the switching and gate driving losses. An open drain power good signal indicates the output is within 90% to 110% of its nominal voltage.

Frequency foldback helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. High-duty cycle and low drop-out mode are provided for the automotive cold-crank condition.

The MPQ4430 is available in QFN-16 (3mmx4mm). 
 

Features

  • Wide 3.3V to 36V Operating Voltage Range
  • 3.5A Continuous Output Current
  • 1μA Low Shutdown Supply Current
  • 10μA Sleep Mode Quiescent Current
  • Internal 90mΩ High-Side and 40 mΩ Low-Side MOSFET
     

Applications

  • Automotive Systems
  • Industrial Power Systems


Typical application

MPS MPQ4430 block diagram

MPS MPQ4430 product image

MPS MPQ4430 related docs (html)

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Related Documents

 

MPS

MPQ4430 - Synchronous Step-Down Converter

A frequency programmable (350k to 2.5MHz) synchronous step-down switching regulator with integrated internal highside and low-side power MOSFETs.

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