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| 型号： | MAX8739ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC CONV W/OPAMP 20TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 1.8 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.8 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
19-3983; Rev 0; 1/06
ATION
EVALU
AVAIL
KIT
ABLE
TFT, LCD, DC-DC Converter with
Operational Amplifiers
General Description
The MAX8739 includes a high-performance, step-up
regulator and two high-current operational amplifiers
for active-matrix thin-film transistor (TFT) liquid-crystal
displays (LCDs). The input supply voltage range of
the MAX8739 is from 1.8V to 5.5V. The device also
includes a logic-controlled, high-voltage switch with
adjustable delay.
The step-up DC-DC converter provides the regulated
supply voltage for the panel source driver ICs. The con-
verter is a high-frequency (600kHz/1.2MHz) current-
mode regulator with an integrated 14V n-channel
MOSFET that allows the use of ultra-small inductors and
ceramic capacitors. It provides fast transient response
to pulsed loads while achieving efficiencies over 85%.
The two high-performance operational amplifiers are
designed to drive the LCD backplane (VCOM) and/or
the gamma-correction-divider string. The devices fea-
ture high output current (±150mA), fast slew rate
(7.5V/μs), wide bandwidth (12MHz), and rail-to-rail
inputs and outputs.
The MAX8739 is available in a 20-pin, 5mm × 5mm thin
QFN package with a maximum thickness of 0.8mm for
ultra-thin LCD panels.
Applications
Notebook Computer Displays
LCD Monitor Panels
Features
? 1.8V to 5.5V Input Supply Range
? 600kHz/1.2MHz Current-Mode Step-Up Regulator
Fast Transient Response to Pulsed Load
High-Accuracy Output Voltage (1.5%)
Built-In 14V, 1.9A, 0.2 ? n-Channel MOSFET
High Efficiency (> 85%)
Digital Soft-Start
? Two High-Performance Operational Amplifiers
±150mA Output Short-Circuit Current
7.5V/μs Slew Rate
12MHz, -3dB Bandwidth
Rail-to-Rail Inputs/Outputs
? Logic-Controlled, High-Voltage Switch with
Adjustable Delay
? Built-In Power-Up Sequence
? Input Supply Undervoltage Lockout
? Timer Delay Fault Latch for All Regulator Outputs
? Thermal-Overload Protection
Simplified Operating Circuit
V IN
Automotive Displays
+1.8V TO +5.5V
LX
V MAIN
Ordering Information
IN
MAX8739
FB
PART
MAX8739ETP+
TEMP RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
20 Thin QFN-EP*
(5mm x 5mm)
PKG
CODE
T2055-2
FREQ
COMP
NEG1
AGND
PGND
SUP
+ Denotes lead-free package.
OUT1
* EP = Exposed pads.
TO VCOM
BACKPLANE
NEG2
OUT2
POS1
POS2
LDO
Pin Configuration appears at end of data sheet.
FROM TCON
DEL
CTL
SRC
DRN
COM
________________________________________________________________ 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.
1
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