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.

The MP2451 is available in the cost-effective SOT23-6 and TSOT23-6 packages. 

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

APPLICATIONS

• High Voltage Power Conversion

• Automotive Systems

• Industrial Power Systems

• Distributed Power Systems

• Battery Powered Systems