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Global Mixed-mode Technology Inc.

G5105

Low-Noise Step-up DC-DC Converter

Features

90% Efficiency

Adjustable Output from V

IN

to 20V

0.8A, 0.6惟, 24V Power MOSFET

2.5V to 5.5V Input Range

Fast 1MHz Switching Frequency

SOT-23-6 and TSOT-23-6 Package

General Description

The G5105 boost converter in corporate high-per-

formance, voltage-mode, fixed-frequency (at 1MHz),

pulse width modulation (PWM) circuitry with a built-in

0.6惟 n-channel MOSFET to provide a highly efficient

regulator.

High switching frequency allows easy filtering and

faster loop performance. An external compensation

pin provides the user flexibility in determining loop dy-

namics, allowing the use of small, low ESR ceramic

output capacitors. The device can produce an output

voltage as high as 20V.

The G5105 is available in a space-saving SOT-23-6

and TSOT-23-6 package.

Applications

Small/Medium Size LCD Displays

Organic LED Bias

Portable Applications

Hand-Held Devices

Ordering Information

ORDER

NUMBER

G5105TBU

G5105TPU

MARKING

5105xx

5105x

TEMP.

RANGE

-40擄C ~ +85擄C

-40擄C ~ +85擄C

PACKAGE

(Pb free)

SOT-23-6

TSOT-23-6

Note:TB : SOT-23-6 TP: TSOT-23-6

U: Tape & Reel

Pin Configuration

Typical Application Circuit

G5105

SW

1

6

VCC

V

IN

2.5V to 5.5V

VCC

L1

4.7碌H

SW

FB

COMP

D1

V

OUT

15V, 40mA

R1

560k

C

F

47pF

SHDN

GND

2

5 COMP

C1

10碌F

GND

R

C

3.6k惟

R2

51k惟

C2

10碌F

FB

3

SOT-23-6/TSOT-23-6

4 SHDN

C

C

10nF

Ver: 0.6 Preliminary

May 10, 2006

TEL: 886-3-5788833

http://www.gmt.com.tw

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