Monolithic Power Systems MP2451DT

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.

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
• Low Shutdown Mode Current: <1uA
• SOT23-6 and TSOT23-6 Packages

Typical applications

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

More information

• IC product information