MP2108

2A, 6V, 740KHz

Synchronous Buck Converter

MP2108 Rev 1.1

www.MonolithicPower.com

1

10/2/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2108 is a 2A, 740KHz synchronous

buck converter designed for low voltage

applications requiring high efficiency. It is

capable of providing output voltages as low as

0.9V, and integrates top and bottom switches to

minimize power loss and component count. The

740KHz switching frequency allows for small

filtering components, further reducing the

solution size.

The MP2108 includes cycle-by-cycle current

limiting and under voltage lockout. Internal

power switches, combined with the tiny 10-pin

MSOP or 3mm x 3mm QFN packages, provide

a solution requiring a minimum of board space.

QFN package is recommended if output current

is higher than 1.5A.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2108DQ/DK-00A

2.5”X x 2.0”Y x 0.5”Z

FEATURES

• 2A Output Current

• Synchronous Rectification

• Internal 160mΩ and 190mΩ Power Switches

• Input Range of 2.6V to 6V

• Over 95% Efficiency

• Under Voltage Lockout Protection

• Soft-Start Operation

• Thermal Shutdown

• Internal Current Limit (Source & Sink)

• Tiny 10-Pin MSOP and 3x3 QFN Packages

APPLICATIONS

• SOHO Routers, PCMCIA Cards, Mini PCI

• Handheld Computers, PDAs

• Cell phones, Digital Still and Video Cameras

• Small LCD Displays

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP2108

LX

VIN

BST

1

3

7

4

5

9

8

6

10

2

FB

COMP

SS

PGND

SGND

VREF

RUN

OUTPUT

2.5V / 2A

INPUT

2.6V to 6V

OFF ON

10nF

10nF

2.2nF

10nF

100

90

80

70

60

50

40

30

20

10

0

0.01

0.1

1

10

LOAD CURRENT (A)