LM3224

L

D

SW

5

FB

2

GND

4

Battery or

Power Source

SS

8

Optional

FSLCT

6

7

SHDN

3

1

LM3224

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SNVS277C – DECEMBER 2004 – REVISED MARCH 2013

LM3224 615kHz/1.25MHz Step-up PWM DC/DC Converter

Check for Samples: LM3224

1

FEATURES

DESCRIPTION

The LM3224 is a step-up DC/DC converter with a

2

•

Operating Voltage Range of 2.7V to 7V

0.15

Ω (typ.), 2.45A (typ.) internal switch and pin

•

615kHz/1.25MHz Pin Selectable Frequency

selectable operating frequency. With the ability to

Operation

convert 3.3V to multiple outputs of 8V, -8V, and 23V,

•

Over Temperature Protection

the LM3224 is an ideal part for biasing TFT displays.

With the high current switch it is also ideal for driving

•

Optional Soft-Start Function

high current white LEDs for flash applications. The

•

8-Lead VSSOP Package

LM3224 can be operated at switching frequencies of

615kHz and 1.25MHz allowing for easy filtering and

APPLICATIONS

low noise. An external compensation pin gives the

user flexibility in setting frequency compensation,

•

TFT Bias Supplies

which makes possible the use of small, low ESR

•

Handheld Devices

ceramic capacitors at the output. An external soft-

•

Portable Applications

start pin allows the user to control the amount of

inrush current during start up. The LM3224 is

•

GSM/CDMA Phones

available in a low profile 8-lead VSSOP package.

•

Digital Cameras

•

White LED Flash/Torch Applications

Typical Application Circuit

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.