Rainbow Electronics MAX8712 - Manual

General Description
The MAX8710/MAX8711/MAX8712 offer complete lin-
ear-regulator power-supply solutions for thin-film tran-
sistor (TFT) liquid-crystal-display (LCD) panels used in
LCD monitors and LCD TVs. All three devices include a
high-performance AVDD linear regulator, a positive
charge-pump regulator, a negative charge-pump regu-
lator, and built-in power-up sequence control. The
MAX8710 and MAX8711 also include a high-current
operational amplifier. Additionally, the MAX8710 pro-
vides logic-controlled high-voltage switches to control
the positive charge-pump output.
The linear regulator directly steps down the input volt-
age to generate the supply voltage for the source-driver
ICs (AVDD). The two built-in charge-pump regulators
are used to generate the TFT gate-on and gate-off sup-
plies. The high-current operational amplifier is typically
used to drive the LCD backplane (VCOM) and features
high output current (150mA), fast slew rate (12V/µs),
and wide bandwidth (12MHz). Its Rail-to-Rail
® inputs
and output maximize flexibility.
The MAX8710 is available in a 24-pin thin QFN package,
the MAX8711 is available in a 16-pin thin QFN package,
and the MAX8712 is available in a 12-pin thin QFN pack-
age. All three packages are 4mm x 4mm with a maximum
thickness of 0.8mm for ultra-thin LCD panel design. They
operate over the -40°C to +100°C temperature range.
Applications
LCD Monitor Panel Modules
LCD TV Panel Modules
Features
♦ High-Performance Linear Regulator
1.6% Output Accuracy
Works with Small Ceramic Output Capacitors
Fast Transient Response
Foldback Current Limit
♦ 50mA Negative Regulated Charge Pump
♦ 20mA Positive Regulated Charge Pump with
Adjustable Delay
♦ Built-In Power-Up Sequence
♦ High-Current Operational Amplifier
(MAX8710/MAX8711)
±150mA Output Short-Circuit Current
12V/µs Slew Rate
12MHz, -3dB Bandwidth
Rail-to-Rail Inputs/Output
♦ Dual-Mode™ High-Voltage Switches (MAX8710)
♦ Thermal Protection
♦ Latched Fault Protection with Timer
MAX8710/MAX8711/MAX8712
Low-Cost Linear-Regulator
LCD Panel Power Supplies
________________________________________________________________ Maxim Integrated Products 1
FBN
SUPCP
DRVN
DLP
POSB
SUPB
OUTB
NEGB
MODE
CTL
GND INL
OUTL
FBL
SHDN
DRVP
FBP
SRC
VGON
VP
AVDD
GON
DRN
THR
REF
IN
IN
VGOFF
CTL
AVDD
VCOM
REF REF
AVDD
VIN
MAX8710
Minimum Operating Circuit
24 23 22 21 20 19
SRC FBN DLP MODE FBL CTL
7 8 9 10 11 12
IN
OUTL
SUPCP
DRVN DRVP
N.C.
13
14
15
16
17
18
GND
OUTB
SUPB
THR
FBP
SHDN
6
5
4
3
2
1
NEGB
INL
POSB
REF
DRN
GON
MAX8710
THIN QFN 4mm x 4mm
TOP VIEW
Pin Configurations
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX8710 ETG -40
°
C to +100
°
C 24 Thin QFN 4mm x 4mm
MAX8711 ETE -40
°
C to +100
°
C 16 Thin QFN 4mm x 4mm
MAX8712 ETC -40
°
C to +100
°
C 12 Thin QFN 4mm x 4mm
19-3174; Rev 0; 1/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations continued at end of data sheet.
EVALUATION KIT
AVAILABLE
Rail-to-Rail is a registered trademark of Motorola, Ltd. Dual Mode is a trademark of Maxim Integrated Products, Inc.