MPQ4460

Industrial Grade, 2.5A, 4MHz, 36V

Step-Down Converter

MPQ4460 Rev1.21

www.MonolithicPower.com

1

12/5/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MPQ4460 is a high frequency step-down

switching regulator with an integrated internal

high-side high voltage power MOSFET. It

provides 2.5A 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-down

applications, including those in an automotive

input

environment.

A

120µA

operational

quiescent 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 4MHz, the MPQ4460 is able to

prevent EMI (Electromagnetic Interference)

noise problems, such as those found in AM

radio and ADSL applications.

The MPQ4460 is available in a small 3mm x

3mm QFN10 package.

FEATURES

• Guaranteed Industrial Temp Range Limits

• 120μA Quiescent Current

• Wide 3.8V to 36V Operating Input Range

• 150mΩ Internal Power MOSFET

• Up to 4MHz Programmable Switching

Frequency

• Ceramic Capacitor Stable

• Internal Soft-Start

• Internally Set Current Limit without a

Current Sensing Resistor

• Up to 95% Efficiency

• Output Adjustable from 0.8V to 30V

• Available in a 3mm x 3mm QFN10 Package

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

C1

10uF

50V

C3

220pF

C6

NS

L1

10uH

C4

100nF

C2

22uF

6.3V

D1

3.3V

VIN

EN

FREQ

GND

BST

SW

FB

COMP

MPQ4460

EN

6

10

1,2

5

4

8,9

3

7

Efficiency vs

Load Current

100

90

80

70

60

50

40

30

0

0.5

1.0

1.5

2.0

2.5

LOAD CURRENT (A)