Monolithic Power Systems MPQ4558

Description

The MPQ4558 is a high-frequency, step-down switching regulator with an integrated internal high-side high-voltage power MOSFET. It provides up to a 1A 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 automotive input. A 12µA shutdown-mode supplycurrent 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 fold-back prevents inductor current runaway during startup and thermal shutdown provides reliable, fault-tolerant operation.By switching at 2MHz, the MPQ4558 can prevent EMI (electromagnetic interference) noise problems, such as those found in AM radio andADSL applications.The MPQ4558 is available in an SOIC8E and a 10-pin 3mm x 3mm QFN package.

Features

• Guaranteed Industrial/Automotive
• Temperature Range Limits
• Wide 3.8V-to-55V Operating Input Range
• 250mΩ Internal Power MOSFET
• Up to 2MHz Programmable Switching Frequency
• 140μA Quiescent Current
• Stable with Ceramic Capacitors
• Internal Soft-Start
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 52V
• Available in SOIC8E and 3mm x 3mm QFN10 Packages
• Available in AEC-Q100 Grade 1

Typical applications

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

More information

• Datasheet
• IC product information