MP1540

1.3MHz, 18V

Step-Up Converter

MP1540 Rev. 1.0

www.MonolithicPower.com

1

8/15/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP1540 is a 5-pin thin TSOT23 current

mode step-up converter intended for small, lo w

power applications. The MP1540 switches a t

1.3MHz and allows the use of tiny, low cost

capacitors and inductors 2mm or less in height.

Internal soft-start results in small inr ush current

and extends battery life. The MP1540 operates

from an input voltage a s lo w as 2. 5V and can

generate 1 2V at up t o 200mA f rom a 5 V

supply.

The MP1540 include s under voltage lockout,

current limiting, an

d thermal overload

protection to prevent damage in the event of an

output overload. T he MP1540 is available in a

small 5-pin TSOT23 package.

FEATURES

• On Board Power MOSFET

• Uses Tiny Capacitors and Inductors

• 1.3MHz Fixed Switching Frequency

• Internal Soft-Start

• Operates with Input Voltage as Low as

2.5V and Output Voltage as High as 18V

• 12V at 200mA from 5V Input

• UVLO, Thermal Shutdown

• Internal Current Limit

• Available in a TSOT23-5 Package

APPLICATIONS

• Camera Phone Flash

• Handheld Computers and PDAs

• Digital Still and Video Cameras

• Ex ternal Modems

• Small LCD Displays

• White LED Driver

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

Power Systems, Inc.

TYPICAL APPLICATION

VIN

5V

VOUT

12V

200mA

D1

MP1540

SW

IN

FB

GND

EN

51

3

2

4

OFF ON

MP1540_TAC01

100

95

90

85

80

75

70

65

60

55

50

0

75

150 225 300 375 450

LOAD CURRENT (mA)

MP1540_TAC_EC01

Efficiency vs Load Current

VIN = 3.3V

VIN = 5V

VIN = 4.2V

http://www.Datasheet4U.com