G5120 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 600k/1.2MHz TFT-LCD Step-Up DC-DC Converter

Global Mixed-mode Technology Inc.
G5120
600k/1.2MHz TFT-LCD Step-Up DC-DC Converter
Features
„ 90% Efficiency
„ Adjustable Output from VIN to 28V
„ 4.6A, 0.1Ω, 30V Power MOSFET
„ 2.5V to 5.5V Input Range
„ 600kHz/1.2MHz Switching Frequency
„ TDFN3X3-10 Package
Applications
„ LCD Displays
„ Portable Applications
„ Hand-Held Devices
General Description
The G5120 boost converter incorporate high-per-
formance, current-mode, and frequency selectable
pulse width modulation (PWM) circuitry with a
built-in N-channel MOSFET to provide a highly effi-
cient regulator.
The G5120’s frequency can be selected by user to
operate at either 600kHz or 1.2MHz. High switching
frequency allows easily filtering and faster loop per-
formance. An external compensation pin provides the
user flexibility in determining loop dynamics, allowing
the use of small, low ESR ceramic output capacitors.
The current-mode architecture provides fast transient
response to pulsed loads.
The internal N-channel MOSFET can produce output
voltage as high as 28V. User programmed soft-start
with an external capacitor determines the input current
ramp rate.
The G5120 is available in a 10-pin TDFN3X3 package.
Ordering Information
ORDER
NUMBER
G5120RE1U
Note :RE: TDFN3X3-10
1: Bonding Code
U: Tape & reel
MARKING
5120
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
TDFN3X3-10
Pin Configuration
Typical Application Circuit
COMP 1
FB 2
SHDN 3
GND 4
GND 5
G5120
Thermal
Pad
10 SS
9 FREQ
8 IN
7 LX
6 LX
TDFN3X3-10
Note: Recommend connecting the Thermal
Pad to the Ground or let it keep floating.
V_IN
4.5V to 5.5V
R4
10Ω
C10
1µF
C12
33nF
L1
3.6µH
D1
C3
6.3V
10µF _G5120
IN
FREQ
LX
LX
GND
GND
C4
4.7µF
25V
SHDN
FB
SS
COMP
R3
100kΩ
C8
330pF
C9
10pF
C5
4.7µF
25V
VOUT
C6
4.7µF
25V
R1
300kΩ
R2
27kΩ
Ver: 0.3
Sep 09, 2009
TEL: [phone]
http://www.gmt.com.tw
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