G5519 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – TFT-LCD DC/DC Converter with Operational Amplifiers

Global Mixed-mode Technology Inc.
G5519
TFT-LCD DC/DC Converter with Operational Amplifiers
Features
„ 2.5V to 5.5V Input Supply Range
„ 1.2MHz Current Mode Boost Converter
Š Fast Transient Response
Š 1.6% Accurate Output Voltage
Š 18V/2.5A, 0.16Ω n-channel MOSFET
Š 91% High Efficiency
„ Linear-Regulator Controllers for V_GON and V_GOFF
„ High-Performance Operational Amplifiers
Š ±150mA Output Short-Circuit Current
Š 12V/μs Slew Rate
Š 12MHz, -3dB Bandwidth
Š Rail-to-Rail Input and Outputs
„ Internal Soft Start
„ Logic-Controller, High-Voltage Switch with Ad-
justable Delay
„ Multiple Overload Protection
„ Thermal Shutdown
„ Small 32-pin 5mmX5mm TQFN package
Applications
„ LCD Monitor Panels
„ Notebook Computer Displays
„ LCD TVs
General Description
The G5519 includes a high-performance boost con-
verter, two linear-regulator controllers, and high cur-
rent operational amplifiers for TFT-LCDs. Also in-
cluded is a logic controlled, high-voltage switch with
adjustable delay.
The boost converter provides the regulated supply
voltage for the panel source driver ICs. It is a high-
frequency (1.2MHz) current-mode regulator with an
integrated 18V n-channel MOSFET that allows the use
of ultra-small inductors and ceramic capacitors. It pro-
vides fast transient response to pulsed loads while
achieving efficiencies over 86%.
Using external low-cost transistors, the linear-regulator
controllers provide tight regulation V_GON/V_GOFF for the
panel gate drivers with fault protection.
The operational amplifier are ideal for V_COM and
V_GAMMA applications. They features high output current
(±150mA), fast slew rate (12V/μs), wide bandwidth
(12MHz), and rail-to-rail inputs and outputs.
The G5519 is available in a 32-pin TQFN package for
ultra-thin LCD panels.
Ordering Information
ORDER
NUMBER
G5519RA1U
Note: RA: TQFN5X5-32
Bonding Code: 1
U: Tape & Reel
Pin Configuration
MARKING
5519
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
TQFN5X5-32
SRC 1
REF 2
AGND 3
PGND ⁴
OUT1 ⁵
NEG1 6
POS1 7
OUT2 8
Thermal
Pad
24 COMP
23 FB
22 IN
21 LX
20 OUT5
19 NEG5
18 POS5
17 OUT4
G5519 TQFN5X5-32
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 0.3
Nov 18, 2009
TEL: [phone]
http://www.gmt.com.tw
1