Monolithic Power Systems MPQ2451-5-33

Description

The MPQ2451 is a high frequency, step-down, switching regulator with an integrated high-voltage high-side power MOSFET. It efficiently provides up to a 0.6A output with current-mode control for fast loop response.

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

The MPQ2451 achieves high power-conversion efficiency over a wide load range by scaling down the switching frequency under light-load condition to reduce the switching and gate driving losses.

Frequency fold-back prevents inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.

The MPQ2451 is available in a cost-effective SOT23-6L package.

Features

• Guaranteed Industrial/Automotive Temp. Range Limits
• • 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 0.8∙VIN
• • 6-Lead SOT23 Package

Typical applications

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