G5520A 台湾致新代理商 GMT DC-DC系列 液晶显示器的集成PMIC

Part Number	Vin (V)min.	Vin (V) max.	FSW (k Hz)	ILX (A)	VLX(V)	OPA S/R (V/us)	OPA ISC  (mA)	Note	Package
G5520A	2.5	5.5	1200	1.8	20	12	150	Async-Boost, VGH/VGL Charge-Pump, VCOM, G5520A With EN, G5520S With XAO	TQFN3X3-16

Bias Power Supply for TFT LCD Panels

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   0.7ΩMOSFET  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.

Features
„2.5V to 5.5V Input Supply Range „
Active-High Enable Control „
1.2MHz Current-Mode Boost Regulator
ŠFast Transient Response to Pulse Load Š
±1% Accurate Output Voltage
ŠBuilt-In 20V/1.8A, 0.7ΩN-Channel MOSFET Š
High Efficiency up to 90%
ŠOver-Current Protection
ŠOutput 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

Ordering Information

ORDER NUMBER	MARKING	TEMP. RANGE	PACKAGE (Green)
G5520AR41U	5520A	~40°C to 85°C	TQFN3X3-16

 Note:R4:TQFN3X3-16                   
1:  Bonding  Code          U:  Tape  &  Reel  

Pin Configuration

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