MP4460

2.5A, 4MHz, 36V

Step-Down Converter

MP4460 Rev. 1.02

www.MonolithicPower.com

1

12/24/2013

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

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP4460 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.

In some applications, such as AM radio and

ADSL applications, in which the device is

sensitive to frequency band, the MP4460 can

avoid the related EMI problem by setting the

frequency at 4MHz.

The MP4460 is available in a small 3mm x 3mm

QFN10 package.

FEATURES

• 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 Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

C3

220pF

C6

NS

C4

100nF

D1

3.3V

VIN

EN

FREQ

GND

BST

SW

FB

COMP

MP4460

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)