MP1522

25V Step-Up Converter

in a SOT23-5 Package

MP1522 Rev. 1.9

www.MonolithicPower.com

1

12/9/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1522 is a step up converter that

generates up to a 25V output voltage from a

2.7V to 25V input. It uses a current limited

Variable

Frequency

control

algorithm

to

optimize efficiency and minimize external

component size and cost. The internal 0.5Ω

N-Channel MOSFET switch can withstand up to

28V allowing the MP1522 to produce high

output voltage with high efficiency.

The MP1522 includes input under voltage and

over temperature protection. The MP1522 is

available in tiny 5-pin SOT23 and 3x3 QFN6

packages.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV0022

2.2”X x 1.5”Y x 0.5”Z

FEATURES

• Internal 0.5Ω Power Switch

• Output Voltage up to 25V

• Up to 90% Efficiency

• Low 1µA Shutdown Current

• Input Under Voltage Protection

• Thermal Shutdown

• Internal Current Limit

• Available in Tiny 5-Pin SOT23 and 6-Pin

3x3 QFN Packages

APPLICATIONS

• 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

MP1522_TAC_S01

FB

SW

GND

EN

2

4

3

5

1

OFF ON

20V

3.3V

C2

1nF

D1

RB751

100

90

80

70

60

50

LOAD CURRENT (mA)

MP1522_TAC_EC01

Efficiency vs Load Current

1

100

10

1000

3.3V

5.0V

10V