Global Mixed-mode Technology Inc.
G5122
Micro-power Inverting DC/DC Converters in SOT-23-5
Features
Configurable Output Voltage Up to -30V
20µA Quiescent Current
<1µA Shutdown Current
<1µA Shutdown Pin Current
Supply Range from 2.5V to 6.5V
Low R
DS(ON)
: 0.8Ω
Tiny SOT23-5 Package
General Description
The G5122 inverting DC/DC converter is designed for
small/ medium size LCD panel of high bias voltage.
Due to a typical 20µA 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 1µA.
Furthermore, the 350mA current limit, 500ns fixed
minimum off-time and tiny SOT23-5 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
1µA of full supply range.
Applications
STN/TFT LCD Bias
Personal Digital Assistants (PDAs)
Handheld Computers
Digital Still Cameras
Cellular Phones
Web Pad
Ordering Information
ORDER
NUMBER
G5122T11U
ORDER NUMBER
(Pb free)
G5122T11Uf
MARKING
5122x
TEMP.
RANGE
-40°C ~ +85°C
PACKAGE
SOT-23-5
Pin Configuration
Typical Application Circuit
V
IN
2.5V to 4.2V
SW
1
5
VCC
4.7µF
GND 2
10µH
0.1µF
10µH
-28V
VCC
SW
316k
*
47PF
10µF
G5122
G963
4
SHDN
G5122
SHDN
GND
FB
15k
FBN 3
SOT23-5
* option
Ver: 0.2 Preliminary
Mar 21, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
