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, 0.3Ω, 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
0.3Ω 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°C ~ +85°C
-40°C ~ +85°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
100µF
+
4.7µH
1N5819
V
OUT
3.3V
SW
1
6
VCC
VCC
SHDN
GND
SW
FB
COMP
R
C
C
C
R2
R1
+
C3
100µF
GND
2
G5107
5
COMP
C2
1µF
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
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
