MP3209

1.4MHz, 350mA

Boost Converter

MP3209 Rev. 0.941

www.MonolithicPower.com

1

11/30/2011

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© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3209 is a current mode step up

converter intended for small, low power

applications. The MP3209 switches at 1.4MHz

and allows the use of tiny, low cost inductor and

capacitor to achieve a solution less than 1mm

in height. Internal soft start results in small

inrush current and extends battery life.

The MP3209 includes under-voltage lockout,

current limiting, and thermal overload protection

to prevent damage in the event of an output

overload. The MP3209 is available in small

5-pin TSOT23 and 2mm x 2mm ultra-thin QFN

8-pin packages.

FEATURES

• 2.5V to 6V Input Voltage Range

• On Board Power MOSFET

• Uses Tiny Capacitors and Inductors

• 1.4MHz Fixed Switching Frequency

• Internally Compensated

• Internal Soft-Start

• Operates with Input Voltage as Low as 2.5V

and Output Voltage as High as 22V

• UVLO, Thermal Shutdown

• Internal Current Limit

• Available in TSOT23-5 and Ultra-Thin 2x2

QFN Packages

APPLICATIONS

• Cell Phones

• External Modems

• Small LCD Displays

• OLED Drivers

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance “MPS”

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

3V - 6V

R2

15V

C3

100pF

D1

MP3209

SW

IN

FB

GND

EN

OFF ON

95

92

89

86

83

80

10

20

30

40

50

60

LOAD CURRENT (mA)

Efficiency vs

Load Current