G2523 台湾致新代理商 GMT DC-DC系列 液晶显示器的集成PMIC
Integrated LCD Bias Power Supply

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
G2523	2.6	5.5	600/ 1200	3.0	20	20	200	Async-Boost, VGH Regulator, OPA*3, Buck-Boost VGL with Temp. Comp.	TQFN4X4-32

 

General Description
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  ac-tive-matrix  thin-film  transistor  (TFT)  liquid-crystal  dis-plays (LCDs).

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  al-lows  the  use  of  ultra  small  inductors  and  ceramic  ca-pacitors.  It  provides  fast  transient  response  to  pulsed  loading  while  achieving  efficiency  over  85%.  The  de-vice  can  produce  output  voltage  as  high  as  18V  from  an input as low as 2.8V.

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.

Features „
2.6V~5.5V Supply Range „
Current Mode Boost Regulator for AVDD
Š0.15Ω/20V/3A Embedded NMOS switch Š
Fixed 1.2MHz Switching Frequency
ŠUp to 85% Efficiency Š
1% Output Regulation „
Voltage Mode Buck-Boost Regulator for VGLŠ
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 Amplifier Š
±200mA Output Short Circuit Current Š
20V/μs Slew Rate
Š18MHz, -3dB Bandwidth
„Built-In Power On Sequence and Soft Start Function „
Protections:
ŠInput Under Voltage Lockout (UVLO) Š
Over Current Protection for AVDD (OCP) Š
Output Under Voltage Protection for AVDD,
VGH and VGL (UVP) ŠOutput Over Voltage Protection for AVDD, VGL (OVP) Š
Operational Amplifier Short Circuit Protection (SCP) Š
Over Temperature Protection (OTP) „
QFN5X5-32 Package
„RoHS Compliant

Applications „
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

Pin Configuration

Typical Application Circuit

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