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MP2451 - Step-Down Converter

Description

The MP2451 is a high frequency (2MHz) stepdown switching regulator with integrated internal high-side high voltage power MOSFET.

It provides single 0.6A (or less) highly efficient output with current mode control for fast loop response.

Features

  • 130μA Operating Quiescent Current.
  • Wide 3.3V to 36V Operating Input Range.
  • 500mΩ Internal Power MOSFET.
  • 2MHz fixed Switching Frequency.
  • Internally compensated.
  • Stable with Ceramic Output Capacitors.
  • Internal Soft-Start.
  • Precision Current Limit Without Current Sensing Resistor.
  • > 90% Efficiency.
  • Output Adjustable from +0.8V to 0.8xVIN.
  • 3μA Low Shutdown Supply Current.
  • SOT23-6 and TSOT23-6 Packages.

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Full PDF Text Transcription

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The Future of Analog IC Technology DESCRIPTION The MP2451 is a high frequency (2MHz) stepdown switching regulator with integrated internal high-side high voltage power MOSFET. It provides single 0.6A (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 environment. A 3μA 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 at light load condition to reduce the switching and gate driving losses. Frequency fold-back helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.
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