Global Mixed-mode Technology Inc.
G5125
Micro-Power Boost DC/DC Converter
Features
Operating Voltage：2.7V ~ 5.5V
High Operating Frequency：1MHz
Shutdown Current：＜1μA
High Output Voltage：Up to 30V
Soft Start Function
Cycle by Cycle Current Limiting
SOT-23-5 Package
General Description
The G5125 boost converter contains a 0.7Ω internal
switch. The IC operates at constant frequency 1MHz,
allowing the use of tiny, low cost and low height in-
ductors and capacitors. The IC operates from a 2.7V
to 5.5V supply voltage and can boost supply voltage
up to 30V at the output. High inrush current at start-up
is eliminated using the soft-start function. Constant
frequency current mode PWM architecture results in
low, predictable output noise. The G5125 includes
cycle-by-cycle 850mA current limiting to maximum
inductor current and over-temperature protection cir-
cuit. The G5125 is suitable for small or medium size
LCD panel of high bias voltage with a constant current
to provide PDAs, and other portable devices. The
G5125 is available in SOT-23-5 package.
Applications
STN/OLED BIAS
Personal Digital Assistants
DSC
Ordering Information
ORDER
NUMBER
G5125T11U
Note: T1: SOT-23-5
1 : Bonding Code
U: Tape & Reel
MARKING
5125x
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
SOT-23-5
Pin Configuration
Typical Application Circuit
10µH or 22µH
G5125
LX
1
5
IN
V
IN
=2.7V to 5.5V
C
IN
4.7µF
IN
LX
V
OUT
=15V
C
OUT
10µF
GND
2
G5125
G963
FB
3
4
EN
500k
R1
FB
EN
GND
SOT-23-5
44k
R2
Ver: 1.2
Jul 08, 2010
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
