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G5520A PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 G5520A
部品説明 Bias Power Supply
メーカ Global Mixed-mode Technology
ロゴ Global Mixed-mode Technology ロゴ 



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G5520A Datasheet, G5520A PDF,ピン配置, 機能
Global Mixed-mode Technology
G5520A
Bias Power Supply for TFT LCD Panels
Features
„ 2.5V to 5.5V Input Supply Range
„ Active-High Enable Control
„ 1.2MHz Current-Mode Boost Regulator
Š Fast Transient Response to Pulse Load
Š ±1% Accurate Output Voltage
Š Built-In 20V/1.8A, 0.7Ω N-Channel MOSFET
Š High Efficiency up to 90%
Š Over-Current Protection
Š Output Under-Voltage Protection
„ High-Performance Operational Amplifier
Š ±150mA Output Short-Circuit Current
Š 12V/μs Slew Rate
Š 12MHz, -3dB Bandwidth
Š Rail-to-Rail Input and Output
„ 600kHz Negative Charge Pump Driver for VGL
„ 600kHz Positive Charge Pump Driver for VGH
„ Power-On Sequence Control
„ Thermal-Overload Protection
„ TQFN3X3-16 Package
Applications
„ Photo Frame
„ GPS
„ UMPC
General Description
The G5520A includes a high-performance boost regu-
lator, a VCOM buffer (unity gain OPA), a VGH charge
pump driver, and a VGL charge pump driver for ac-
tive-matrix thin-film transistor (TFT) liquid-crystal dis-
plays (LCDs).
The boost converter provides the regulated supply
voltage for the panel source driver ICs. The converter
is a high switching frequency (1.2MHz) current mode
regulator with an integrated 20V N-Channel 0.7Ω
MOSFET that allows the use of ultra-small inductors
and ceramic capacitors. It provides fast transient re-
sponse to pulsed loading while achieving efficiency
over 90%. The device can produce output voltage as
high as 18V from an input as low as 2.8V.
The VCOM buffer can drive the LCD VCOM voltage that
features high short-circuit current (150mA), fast slew
rate (12V/μs), wide bandwidth (12MHz) and rail-to-rail
input/output.
A positive and a negative charge-pump driver provide
adjustable regulated output voltages VGH and VGL to
bias the TFT. Both the charge-pump driver operate
with 600kHz switching frequency.
The G5520A includes internal power-up sequencing,
over/under voltage protections of the boost converter,
and over temperature protection to ensure in safe op-
erating.
The G5520A are available in a 16-pin 3X3TQFN
packages.
Ordering Information
ORDER
NUMBER
MARKING
G5520AR41U 5520A
Note: R4:TQFN3X3-16
1: Bonding Code
U: Tape & Reel
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
TQFN3X3-16
Pin Configuration
DRVN 1
REF 2
AGND 3
NC 4
Thermal
Pad
12 FB
11 IN
10 LX
9 PGND
Ver: 0.2
Oct 21, 2013
G5520A TQFN3X3-16
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
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