G2523

G2523
Global Mixed-mode Technology
Integrated LCD Bias Power Supply
Features
General Description
„ 2.6V~5.5V Supply Range
„ Current Mode Boost Regulator for AVDD
Š 0.15Ω/20V/3A Embedded NMOS switch
Š Fixed 1.2MHz Switching Frequency
Š Up to 85% Efficiency
Š 1% Output Regulation
„ Voltage Mode Buck-Boost Regulator for VGL
Š Fixed 600kHz Switching Frequency
Š Up to 85% Efficiency
Š 1% Output Regulation
„ Charge Pump Regulator for VGH
„ 3-Channel Rail-to-Rail Unity-Gain Operational
The G2523 includes a high-performance boost regulator,
a buck-boost controller, a high voltage charge pump
regulator, 3 VCOM buffers (unity-gain OPA) for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs).
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„
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The boost regulator provides the regulated supply
voltage for the panel source driver ICs. It is a high
switching frequency (1.2MHz) current-mode regulator
with an integrated 20V/0.15Ω NMOS switch that allows the use of ultra small inductors and ceramic capacitors. It provides fast transient response to pulsed
loading while achieving efficiency over 85%. The device can produce output voltage as high as 18V from
an input as low as 2.8V.
Amplifier
Š ±200mA Output Short Circuit Current
Š 20V/µs Slew Rate
Š 18MHz, -3dB Bandwidth
Built-In Power On Sequence and Soft Start
Function
Protections:
Š Input Under Voltage Lockout (UVLO)
Š Over Current Protection for AVDD (OCP)
Š Output Under Voltage Protection for AVDD,
VGH and VGL (UVP)
Š Output Over Voltage Protection for AVDD,
VGL (OVP)
Š Operational Amplifier Short Circuit Protection
(SCP)
Š Over Temperature Protection (OTP)
QFN5X5-32 Package
RoHS Compliant
A voltage mode buck-boost controller cooperates with
external temperature sensor provide compensated
gate-off voltage supply to the level shifters. While the
charge pump controller regulates the external charge
pump voltage source to supply for other devices.
The VCOM buffer can drive the LCD VCOM voltage
that features high short-circuit current (200mA), fast
slew rate (20V/µs), wide bandwidth (8MHz) and
rail-to-rail input/output.
The G2523 features extensive protection functions
that include UVLO, OCP, UVP, OVP, and OTP. It is
available in a QFN5X5-32 package.
Applications
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LCD TV Panel
LCD Monitor Panel
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G2523QA1U
2523
-40°C to +85°C
QFN5X5-32
Note: QA: QFN5X5-32
1: Bonding Code
U: Tape & Reel
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.1
Aug 22, 2013
1
G2523
Global Mixed-mode Technology
SW1
SW1
PGND
PGND
FB
COMP1
AGND
DRVP
32
31
30
29
28
27
26
25
Pin Configuration
AVIN
1
24
FBP
VSUP
2
23
VREF
OPAO3
3
22
NTC
OPAI3
4
21
END
OPAO2
5
20
DRVN
OPAI2
6
19
NC
OPAO1
7
18
COMP2
OPAI1
8
17
FBN
13
15
16
VDTS
VREF
VGL
14
12
NC
PU
11
NC
FLT
9
10
OGND
Thermal
Pad
G2523 QFN5X5-32
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Typical Application Circuit
TEL: 886-3-578833
http://www.gmt.com.tw
Ver: 0.1
Aug 22, 2013
2