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
Fast Transient Response
1.6% Accurate Output Voltage
18V/2.5A, 0.16Ω n-channel MOSFET
91% High Efficiency
Linear-Regulator Controllers for V
GON
and V
GOFF
High-Performance Operational Amplifiers
±150mA
Output Short-Circuit Current
12V/μs Slew Rate
12MHz, -3dB Bandwidth
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
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.
Applications
LCD Monitor Panels
Notebook Computer Displays
LCD TVs
Ordering Information
ORDER
NUMBER
G5519RA1U
Note: RA: TQFN5X5-32
Bonding Code: 1
U: Tape & Reel
MARKING
5519
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
TQFN5X5-32
DRVN
DRVP
26
Pin Configuration
COM
DRN
DEL
CTL
32
29
31
30
FBN
27
28
SRC
REF
AGND
PGND
OUT1
NEG1
POS1
OUT2
25
FBP
1
2
3
4
5
6
7
8
12
13
14
15
10
11
16
9
24
23
22
COMP
FB
IN
LX
OUT5
NEG5
POS5
OUT4
Thermal
Pad
21
20
19
18
17
BGND
NEG2
POS3
POS4
SUP
G5519 TQFN5X5-32
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
NEG4
POS2
OUT3
Ver: 0.3
Nov 18, 2009
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
