Monolithic Power Systems MP4458

Description

The MP4458 is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 1 A output with current mode control for fast loop response and easy compensation.The wide 3.8V to 36V input range accommodates a variety of step-downapplications, including those in automotive systems. A 120µA operational quiescent current is suitable for use in battery-powered applications.The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation.In some applications, such as AM radio and ADSL applications, in which the device is sensitive to frequency band, the MP4458 can avoid the related EMI problem by setting the frequency at 4MHz.The MP4458 is available in thin 10-pin 3mm x 3mm TQFN package.

Features

• 120μA Quiescent Current
• Wide 3.8V to 36V Operating Input Range
• 300mΩ Internal Power MOSFET
• Up to 4MHz Programmable Switching Frequency
• Ceramic Capacitor Stable
• Internal Soft-Start
• Precision Current Limit without a Current Sensing Resistor
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 30V
• Available in 10-Pin 3x3mm TQFN Package

Note:Refer page no 10 inductor selection table is given

Typical applications

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

More information

• Datasheet
• IC product information