MP4350

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2.5A, 4MHz, 20V Step-Down Converter


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Product Description

The MP4350 is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 2.5A output with current mode control for fast loop response and easy compensation. The wide 4.5V to 20V input range accommodates a variety of step-down applications, including those in an automotive input environment. A 100? operational 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 at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 4MHz, the MP4350 is able to prevent switching related EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MP4350 is available in a small 3mm x 3mm 10-pin QFN package.

Product Features

  • 100? Quiescent Current
  • Wide 4.5V to 20V Operating Input Range
  • 3A Peak Switch Current
  • 150mO Internal Power MOSFET
  • Up to 4MHz Programmable Switching Frequency
  • Ceramic Capacitor Stable
  • Internal Soft-Start
  • Internal Set Current Limit without a Current Sensing Resistor
  • Up to 95% Efficiency
  • Output Adjustable from 0.8V to 16V
  • Available in a 10-Pin QFN 3x 3 Package

Parametrics

  • fsw (max) (kHz)4000
  • Vin (min) (V)4.5
  • Vin (max) (V)20
  • Iout (max) (A)2.5
  • Isw Limit (typ) (A)3.5
  • Vfb (typ) (V)0.8
  • Iq (typ) (mA)0.1
  • Regulated Outputs1
  • Vout (max) (V)16
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-10 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesLight-Load Efficiency
  • Special FeaturesProgrammable Frequency