MP9115

2.7-6V Input, 2.5A,1.2MHz

Synchronous Step-Down Converter

MP9115 Rev. 0.92

www.MonolithicPower.com

1

1/14/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP9115 is a fully integrated, internally

compensated 1.2MHz fixed frequency PWM

step-down converter. It is ideal for powering

portable equipment that runs from a single cell

Lithium-Ion (Li+) Battery, with an input range

from 2.7V to 6V. The MP9115 can provide up to

2.5A of load current with output voltage as low

as 0.8V. It can also operate at 100% duty cycle

for low dropout applications.

With peak current mode control and internal

compensation, the MP9115 is stable with

ceramic capacitors and small inductors. Fault

condition protection includes cycle-by-cycle

current limiting and thermal shutdown.

MP9115 is available in the small 10-pin

3mmx3mm TQFN package.

FEATURES

• Output Adjustable from 0.8V to VIN

• Up to 91% Efficiency

• 100% Duty Cycle for Low Dropout

Applications

• 1μA Shutdown Current

• 1.2MHz Fixed Switching Frequency

• 2.7V-6V Input Operation Range

• 3A Peak Output Current

• Stable with Low ESR Output Ceramic

Capacitors

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Short circuit protection

• No reverse current of LS MOS for Pre-bias

start up

• Available in 10-pin 3x3mm TQFN

APPLICATIONS

• Smart Phones

• PDA’s

• DVD+/-RW Drives

• Digital Cameras

• Portable Instruments

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

Power Systems, Inc.

TYPICAL APPLICATION

C

Cf

22pF

2

22

SHDN

L1

2.2uH

1.2

C1

R2

MP9115

SHDN

GND

LX

LX

N/C

N/C

FB

VIN

N/C

PVIN

1

2

3

4

5

10

9

8

7

6

Efficiency

LOAD CURRENT (A)

0.01

0.1

1

10

0

10

20

30

40

50

60

70

80

90

100