MP2560

2.5A, 4MHz, 42V

Step-Down Converter

MP2560 Rev. 1.2

www.MonolithicPower.com

1

1/25/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2560 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 4.5V to 42V input range accommodates

a variety of step-down applications, including

those in an automotive input environment. A 12µA

shutdown mode 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 MP2560 is able to

prevent EMI (Electromagnetic Interference) noise

problems, such as those found in AM radio and

ADSL applications.

The MP2560 is available in small 3mm x 3mm

QFN10 and thermally enhanced SOIC8 packages.

FEATURES

• 120µA Quiescent Current

• Wide 4.5V to 42V Operating Input Range

• 220mΩ Internal Power MOSFET

• Up to 4MHz Programmable Switching

Frequency

• Stable with Ceramic Capacitor

• Internal Soft-Start

• Internally Set Current Limit without external

Current Sensing Resistor

• Up to 93% Efficiency

• Output Adjustable from 0.8V to 39V

• Available in 3x3 QFN10 and Thermally

Enhanced SOIC8 Packages

APPLICATIONS

• High Voltage Power Conversion

• Automotive Systems

• Industrial Power Systems

• Distributed Power Systems

• Battery Powered Systems

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

C6

NS

D1

3.3V

VIN

EN

FREQ

GND

BST

SW

FB

COMP

MP2560

EN

6

10

1,2

4

5

8,9

3

7

0.5

1

1.5

2

2.5

0

LOAD CURRENT (A)

95

90

85

80

75

70

65

60

55

50

Efficiency vs.

Load Current

fs=500kHz

=3.3V