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, 0.6Ω, 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
0.6Ω 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°C ~ +85°C
-40°C ~ +85°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
4.7µH
SW
FB
COMP
D1
V
OUT
15V, 40mA
R1
560k
C
F
47pF
SHDN
GND
2
5 COMP
C1
10µF
GND
R
C
3.6kΩ
R2
51kΩ
C2
10µF
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
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
