Monolithic Power Systems MPQ4561

Description

The MPQ4561 is a high-frequency, step-down, switching regulator with an integrated internal high-side high voltage power MOSFET. It provides up to a 1.5A output with current mode control for fast loop response and easycompensation.The wide 3.8V-to-55V input range accommodates a variety of step-down applications, including those in automotive input environment. A 12µAshutdown mode supply current makes it suitable for battery-powered applications.A scaled-down switching frequency in light-load conditions provides high power-conversion efficiency over a wide load range while reducing switching and gate driver losses.The frequency foldback prevents inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation.By switching at 2MHz, the MPQ4561 is able to prevent EMI (Electromagnetic Interference) noise problems, such as those found in AM radio andADSL applications.The MPQ4561 is available in a 3mm x 3mm QFN10 package with an exposed pad.

Features

• Guaranteed Industrial/AutomotiveTemperature Range Limits
• Wide 3.8V to 55V Operating Input Range
• 300mΩ Internal Power MOSFET
• Up to 2MHz Programmable Switching Frequency
• 140μA Quiescent Current
• Stable with Ceramic Capacitor
• External Soft-Start
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 52V
• Available in QFN10 (3mmx3mm) package

Typical applications

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

More information

• Datasheet
• IC product information