Monolithic Power Systems MP2451

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 loopresponse.

The wide 3.3V to 36V input range accommodates a variety of step-downapplications in automotive input environment. A 3μA shutdown mode quiescent current allows use in battery-powered applications.

High power conversion efficiency over a wideload 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 SOT23-6L package.

Features

• 130μA Operating Quiescent Current
• Wide 3.3V to 36V Operating Input Range
• 500mΩInternal 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

Typical applications

• High Voltage Power Conversion
• Industrial Power Systems
• Battery Powered Systems
• Automotive Systems
• Distributed Power Systems

More information

• Datasheet
• IC product information