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MAX1543

更新时间： 2024-11-05 22:57:59
品牌 Logo 应用领域
美信 - MAXIM 转换器运算放大器
页数 文件大小 规格书
20页 505K
描述
TFT LCD DC-to-DC Converter with Operational Amplifiers

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MAX1543 数据手册

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19-2741; Rev 0; 4/03  
TFT LCD DC-to-DC Converter with  
Operational Amplifiers  
General Description  
Features  
The MAX1542/MAX1543 include a high-performance  
boost regulator and two high-current operational ampli-  
fiers for active matrix, thin-film transistor (TFT), liquid-  
crystal displays (LCDs). Also included is a logic-  
controlled, high-voltage switch with adjustable delay.  
The MAX1543 includes an additional high-voltage load  
switch and features pin-selectable boost regulator  
switching frequency.  
o Ultra-High-Performance Step-Up Regulator  
Fast Transient Response to Pulsed Load Using  
Current-Mode Control Architecture  
High-Accuracy Output Voltage (1.3%)  
Built-In 14V, 1.2A, 0.2Ω N-Channel Power  
MOSFET with Lossless Current-Sensing  
High Efficiency (85%)  
8-Step Current-Controlled Digital Soft-Start  
The step-up DC-to-DC converter is a high-frequency  
640kHz (MAX1543)/1.2MHz (MAX1542/MAX1543) cur-  
rent-mode regulator with a built-in power MOSFET that  
allows the use of ultra-small inductors and ceramic  
capacitors. It provides fast transient response to pulsed  
loads while producing efficiencies over 85%.  
o Two High-Performance Operational Amplifiers  
150mA Output Short-Circuit Current  
7.5V/µs Slew Rate  
12MHz -3dB Bandwidth  
Rail-to-Rail Inputs/Outputs  
Unity Gain Stable  
The two easy-to-use, high-performance operational  
o Logic-Controlled High-Voltage Switch with  
amplifiers can drive the LCD backplane (V  
) and/or  
COM  
Adjustable Delay  
the gamma correction divider string. The devices fea-  
ture high short-circuit current (150mA), fast slew rate  
(7.5V/µs), wide bandwidth (12MHz), and Rail-to-Rail®  
inputs and outputs.  
o Timer Delay Latch FB Fault Protection  
o Thermal Protection  
o 2.6V to 5.5V Input Operating Voltage Range  
The MAX1542/MAX1543 are available in 20-pin thin  
QFN packages with a maximum thickness of 0.8mm for  
ultra-thin LCD panel design.  
o 3.6mA (Switching), 0.45mA (Not Switching)  
Quiescent Current  
o Ultra-Thin 20-Pin Thin QFN Package  
Applications  
(5mm x 5mm x 0.8mm)  
Notebook Computer Displays  
LCD Monitor Panels  
PDAs  
Car Navigation Displays  
Pin Configurations  
Ordering Information  
PART  
TEMP RANGE PIN-PACKAGE  
TOP VIEW  
MAX1542ETP  
MAX1543ETP  
-40°C to +85°C 20 Thin QFN (5mm x 5mm)  
-40°C to +85°C 20 Thin QFN (5mm x 5mm)  
COM  
1
2
3
4
5
15 FREQ  
14 IN  
SRC  
I.C.  
13 LX  
MAX1543  
PGND  
AGND  
12 SUP  
11 POS2  
THIN QFN (5mm x 5mm)  
Pin Configurations continued at end of data sheet.  
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.  
________________________________________________________________ Maxim Integrated Products  
1
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.  
1234567...20

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