G5107 Datasheet, PDF (1/10 Pages) Global Mixed-mode Technology Inc – Low-Voltage, High-Efficiency, Step-up DC-DC Converter

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
Applications
„ MP3 Players
„ PDAs
„ Digital Still Cameras
„ Portable Applications
„ Hand-Held Devices
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.
Pin Configuration
SW 1
6 VCC
GND 2
G5107
5 COMP
FB 3
4 SHDN
SOT-23-6 / TSOT-23-6
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Pb free)
G5107TBU
5107xx -40°C ~ +85°C SOT-23-6
G5107TPU
5107xx -40°C ~ +85°C TSOT-23-6
Note: TB : SOT23-6
TP: TSOT-23-6
U: Tape & Reel
Typical Application Circuit
V_IN
+
C1
100µF
L1
4.7µH
1N5819
V_OUT
3.3V
VCC
SW
SHDN
FB
R1
+
C3
100µF
GND COMP
C2
1µF
R2
R_C
C_C
Ver: 0.3 Preliminary
TEL: [phone]
May 11, 2006
http://www.gmt.com.tw
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