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| 型号： | MAX1997ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/31页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY TFT LCD 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，TFT LCD |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 5 |
| 输出电压： | 2.7 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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19-2638; Rev 0; 10/02
Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
General Description
The MAX1997/MAX1998 provide the voltages required for
active-matrix, thin-film transistor liquid-crystal displays
(TFT LCDs). Both combine a high-performance step-up
regulator with two linear-regulator controllers, input pro-
tection switch control, and flexible sequence program-
ming. The MAX1997 contains two additional linear-
regulator controllers and a VCOM buffer. The MAX1997/
MAX1998 can operate from input supplies of 2.7V to 5.5V
and feature multiple levels of protection circuitry, making
them complete power-supply systems for displays.
The main DC-DC converter provides the regulated supply
voltage for the display’s source-driver ICs. The converter
is a high-frequency (up to 1.5MHz) step-up regulator with
an integrated 14V N-channel MOSFET that allows the use
of ultra-small inductors and ceramic capacitors while
achieving efficiencies over 85%. Its current-mode control
architecture provides fast transient response to pulsed
loads. Internal soft-start and cycle-by-cycle current limit
help prevent input surge currents.
The positive and negative linear-regulator controllers
postregulate charge-pump outputs for TFT gate-on and
gate-off supplies. Both linear-regulator controllers, as well
as the step-up regulator, have supply-sequencing control
Features
o 2.7V to 5.5V Input Supply Range
o Adjustable (Up to +13V) Output Voltage for
Source-Driver ICs
o Integrated High-Efficiency Power MOSFET
o Linear-Regulator Controllers for TFT Gate-On and
Gate-Off Supplies
o High-Current VCOM Buffer (MAX1997 Only)
o Two Additional Linear-Regulator Controllers
(MAX1997 Only)
o Programmable Power-Up Sequencing
o Multiple Overload Protection with Thermal
Shutdown
o 1μA Shutdown Current
o 32-Pin/20-Pin Thin QFN Packages
Ordering Information
inputs. The three outputs can be sequenced in any order
by selecting the appropriate external components.
The MAX1997 features a high-current backplane driver
(VCOM). This buffer provides peak currents exceeding
PART
MAX1997 ETJ
MAX1998 ETP
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
32 Thin QFN 5mm x 5mm
20 Thin QFN 5mm x 5mm
300mA (typ) and requires only a 0.47μF output filter
capacitor. The MAX1997’s two additional linear-regulator
controllers can be used to build the gamma reference
voltage and a logic supply.
The MAX1997/MAX1998 have a unique input switch con-
trol that can replace the typical input supply fuse. When a
fault is detected, the regulator is disconnected from the
input supply. The fault detector monitors all the regulated
output voltages and the current from the input supply. In
TOP VIEW
Pin Configurations
addition, the MAX1997/MAX1998 enter shutdown when
the internal over-temperature threshold is reached.
PGND
CT
1
2
15
14
TGNDA
LX
The MAX1997 is available in a 32-pin thin QFN package
and the MAX1998 is available in a 20-pin thin QFN pack-
age. Both packages have a maximum thickness of
0.8mm suitable for ultra-thin LCD panels.
ONN
ONP
ON2
3
4
5
MAX1998
13
12
11
DRVP
FBP
FB
Applications
Notebook Computer Displays
LCD Monitors
Car Navigation Displays
THIN QFN 5mm × 5mm
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1997EVKIT | 制造商:Maxim Integrated Products 功能描述:QUINTUPLE/TRIPLE OUTPUT TFT LCD POWER SUPPLIE - Bulk |
| MAX19983A | 功能描述:上下转换器 RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX19985AETX+ | 功能描述:上下转换器 High-Gain 700MHz to 1GHz Downconv RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX19985AETX+T | 功能描述:上下转换器 High-Gain 700MHz to 1GHz Downconv RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX19985ETX+ | 功能描述:上下转换器 Dual, SiGe, .7-1GHz Downconversion Mixer RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
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