G5105 Datasheet, PDF (1/11 Pages) Global Mixed-mode Technology Inc – Low-Noise Step-up DC-DC Converter

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
Applications
„ Small/Medium Size LCD Displays
„ Organic LED Bias
„ Portable Applications
„ Hand-Held Devices
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.
Pin Configuration
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Pb free)
G5105TBU
5105xx -40°C ~ +85°C SOT-23-6
G5105TPU
5105x -40°C ~ +85°C TSOT-23-6
Note:TB : SOT-23-6 TP: TSOT-23-6
U: Tape & Reel
Typical Application Circuit
SW 1
G5105
6 VCC
GND 2
5 COMP
FB 3
4 SHDN
SOT-23-6/TSOT-23-6
V_IN
2.5V to 5.5V
C1
10µF
L1
4.7µH
VCC
SW
SHDN
FB
D1
R1
560k
C_F
47pF
V_OUT
15V, 40mA
GND COMP
R2
R_C
51kΩ
3.6kΩ
C_C
10nF
C2
10µF
Ver: 0.6 Preliminary
TEL: [phone]
May 10, 2006
http://www.gmt.com.tw
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