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Global Mixed-mode Technology Inc.

G5107

Low-Voltage, High-Efficiency, Step-up DC-DC Converter

Features

1.2V Low Start-up Input Voltage

Deliver 3.3V 100mA from 2 Alkaline Battery Cell

90% Efficiency

Adjustable Output from 2.5V to 5.5V

1.5A, 0.3惟, 7V Power MOSFET

1.2V to 5.5V Input Range

Fast 1MHz Switching Frequency

SOT-23-6 & TSOT-23-6 Package

General Description

The G5107 boost converter in corporate high-per-

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

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

0.3惟 n-channel MOSFET to provide a highly efficient

regulator. The low start-up input voltage 1.2V makes

G5107 suitable for 2~4 cells alkaline battery applica-

tions.

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 various types of output

capacitors. The device can produce an output voltage

from 2.5V to 5.5V.

The G5107 is available in a space-saving SOT-23-6 &

TSOT-23-6 package.

Applications

MP3 Players

PDAs

Digital Still Cameras

Portable Applications

Hand-Held Devices

Ordering Information

ORDER

NUMBER

G5107TBU

G5107TPU

MARKING

5107xx

5107xx

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 : SOT23-6

U: Tape & Reel

TP: TSOT-23-6

Pin Configuration

Typical Application Circuit

L1

V

IN

C1

100碌F

+

4.7碌H

1N5819

V

OUT

3.3V

SW

1

6

VCC

VCC

SHDN

GND

SW

FB

COMP

R

C

C

C

R2

R1

+

C3

100碌F

GND

2

G5107

5

COMP

C2

1碌F

FB

3

SOT-23-6 / TSOT-23-6

4

SHDN

Ver: 0.3 Preliminary

May 11, 2006

TEL: 886-3-5788833

http://www.gmt.com.tw

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