Global Mixed-mode Technology Inc.
G5111
Micro-power Step-Up DC/DC Converters in SOT23-5
Features
Configurable Output Voltage Up to 14V
20碌A(chǔ) Quiescent Current
<1碌A(chǔ) Shutdown Current
<1碌A(chǔ) Shutdown Pin Current
Supply Range from 2.5V to 6.5V
Low V
CESAT
: 250mV (I
SW
=300mA)
Tiny SOT23-5 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(chǔ) quiescent current and
2.5V~6.5V supply voltage range, it is suitable for bat-
tery powered portable applications. Such as PDAs and
Handheld Computers. When the IC sets to shutdown
mode, it only consumes less than 1碌A(chǔ).
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
1碌A(chǔ) 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
PART
G5111
TEMP. RANGE
-40擄C ~ +85擄C
PIN-PACKAGE
SOT23-5
Pin Configuration
Typical Application Circuit
10碌H
V
IN
2.5V to 4.2V
12V
10mA
SW
1M
SW
1
5
VCC
VCC
10pF
GND
2
G5111
G963
4.7碌F
G5111
SHDN
FB
110k
1碌F
GND
FB
3
SOT23-5
4
SHDN
Ver 0.2 Preliminary
Jan 09, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
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