MP1567

1.2A Synchronous Rectified

Step-Down Converter

MP1567 Rev. 2.3

www.MonolithicPower.com

1

1/3/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP1567 is a 1.2A, 800KHz DC to DC

converter designed for low voltage applications

requiring high efficiency. Capable of providing

output voltages as low as 0.9V from a 3.3V

supply voltage, the MP1567 eliminates the

need for a 5V rail, providing over 90% efficiency

via synchronous rectification and eliminating

heat issues in confined spaces. Soft-start

operation protects internal circuitry from hard

turn on issues. Switching at 800KHz reduces

the size of external components and thereby

reduces board space.

The MP1567 includes cycle-by-cycle current

limiting and under voltage lockout. Internal

power switches combined with the tiny 10-pin

MSOP or QFN packages provide a solution

requiring a minimum of space.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV0033 (MP1567DK)

2.5”X x 2.0”Y x 0.7”Z

EV0059 (MP1567DK)

2.5”X x 2.0”Y x 0.4”Z

EV0060 (MP1567DQ)

2.5”X x 2.0”Y x 0.4”Z

FEATURES

• 1.2A Output Current

• Synchronous Rectified

• Internal 180mΩ and 220mΩ Power Switches

• Over 90% Efficiency

• Zero Current Shutdown Mode

• Under Voltage Lockout Protection

• Soft-Start Operation

• Thermal Shutdown

• Internal Current Limit (Source & Sink)

• Tiny 10-Pin MSOP or QFN Packages

• Evaluation Boards Available

APPLICATIONS

• SOHO Routers, PCMCIA Cards, Mini PCI

• Handheld Computers, PDAs

• Cell Phones

• Digital Video Cameras

• Small LCD Displays

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

Power Systems, Inc.

TYPICAL APPLICATION

MP1567

SW

IN

BS

1

3

7

9

8

4

5

6

10

2

FB

BP

SS

COMP

SGND PGND

EN

1.8V/1.2A

INPUT

2.6V to 6V

OPEN IF

NOT USED

MP1567_TAC_S01

OFF ON

10nF

10nF

1nF

10nF

100

90

80

70

60

50

40

30

20

10

0

10

100

1000

LOAD CURRENT (mA)

MP1567_EC01

Efficiency vs

Load Current