MPQ4559

Industrial Grade, 1.5A, 2MHz, 55V

Step-Down Converter

AEC-Q100 Qualified

MPQ4559 Rev. 1.01

www.MonolithicPower.com

1

6/9/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

DESCRIPTION

The MPQ4559 is a high frequency step-down

switching regulator with integrated internal high-

side high voltage power MOSFET. It provides

1.5A output with current mode control for fast loop

response and easy compensation.

The wide 3.8V to 55V input range accommodates

a variety of step-down applications, including

those in automotive input environment. A 12µA

shutdown mode supply 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.

The frequency foldback helps prevent inductor

current runaway during startup and thermal

shutdown

provides

reliable,

fault

tolerant

operation.

By switching at 2MHz, the MPQ4559 is able to

prevent EMI (Electromagnetic Interference) noise

problems, such as those found in AM radio and

ADSL applications.

The MPQ4559 is available in small 3mm x 3mm

QFN10 and SOIC8 with exposed pad packages..

FEATURES

 Guaranteed Industrial Temp Range Limits

 Wide 3.8V to 55V Operating Input Range

 250mΩ Internal Power MOSFET

 Up to 2MHz Programmable Switching

Frequency

 140μA Quiescent Current

 Ceramic Capacitor Stable

 Internal Soft-Start

 Up to 95% Efficiency

 Output Adjustable from 0.8V to 52V

 Available in QFN (3mm x 3mm) and

SOIC8E with Exposed Pad Packages

 AEC-Q100 Qualified

APPLICATIONS

 High Voltage Power Conversion

 Automotive Systems

 Industrial Power Systems

 Distributed Power Systems

 Battery Powered Systems

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance.

“MPS” and “The

Future of Analog IC Technology

” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION