MP2451

Active
36V, 2MHz, 0.6A Step-Down Converter


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Product Description

The MP2451 is a high frequency (2MHz) step-down 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 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 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. The MP2451 is available in the cost-effective SOT23-6 and TSOT23-6 packages.

Programmable

Product 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

Parametrics

  • fsw (max) (kHz)2000
  • Vin (min) (V)3.3
  • Vin (max) (V)36
  • Iout (max) (A)0.6
  • Isw Limit (typ) (A)1
  • Vfb (typ) (V)0.794
  • Iq (typ) (mA)0.13
  • Regulated Outputs1
  • Vout (max) (V)29
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageSOT23-6L
  • Control ModeCurrent Mode

Reference Materials