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Global Mixed-mode Technology Inc.

G5111

Micro-power Step-Up DC/DC Converters in SOT-23-5

Features

Configurable Output Voltage Up to 28V

20碌A Quiescent Current

<1碌A Shutdown Current

<1碌A Shutdown Pin Current

Supply Range from 2.5V to 6.5V

Low V

DS(on)

: 250mV (I

SW

=300mA)

Tiny SOT-23-5 Package

General Description

The G5111 boost converter is designed for small/ me-

dium size LCD panel of high bias voltage.

Due to a typical 20碌A quiescent current and 2.5V~

6.5V supply voltage range, it is suitable for battery

powered portable applications. Such as PDAs and

Handheld Computers. When the IC sets to shutdown

mode, it only consumes less than 1碌A.

Furthermore, the 350mA current limit, 500ns fixed

minimum off-time and tiny SOT-23-5 package facili-

tates the use of smaller inductor and other sur-

face-mount components to minimize the PCB size in

those space-conscious applications.

To control the IC, no other external current is needed

for the shutdown pin. It typically consumes less than

1碌A of full supply range.

Applications

STN/TFT LCD Bias

Personal Digital Assistants (PDAs)

Handheld Computers

Digital Still Cameras

Cellular Phones

WebPad

White LED Driver

Local 3V to 5V Conversion

Ordering Information

ORDER

NUMBER

G5111T11U

G5111T12U

ORDER NUMBER

(Pb free)

G5111T11Uf

G5111T12Uf

MARKING

51xx

52xx

TEMP. RANGE

-40擄C ~ +85擄C

-40擄C ~ +85擄C

PACKAGE

SOT-23-5

SOT-23-5

Pin Configuration

Typical Application Circuit

SW

1

5

VCC

10碌H

V

IN

2.5V to 4.2V

VCC

SW

1M

20V

12mA

GND 2

G5111 T11

G963

FB 3

4

SHDN

SOT-23-5

G5111

SHDN

FB

62k

1碌F

4.7碌F

GND

SHDN 1

5

FB

VCC 2

G5111 T12

G963

GND 3

4

SW

SOT-23-5

Ver: 1.2

Sep 09, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

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