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MAX749ESA PDF预览

MAX749ESA

更新时间: 2024-11-26 22:25:55
品牌 Logo 应用领域
美信 - MAXIM 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
12页 107K
描述
Digitally Adjustable LCD Bias Supply

MAX749ESA 技术参数

是否无铅: 含铅是否Rohs认证: 不符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:0.150 INCH, SOP-8针数:8
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.14
Is Samacsys:N其他特性:ALSO OPERATES IN PFM
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:6 V
最小输入电压:2 V标称输入电压:5 V
JESD-30 代码:R-PDSO-G8JESD-609代码:e0
长度:4.9 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):245
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Power Management Circuits最大供电电流 (Isup):0.06 mA
表面贴装:YES切换器配置:SINGLE
最大切换频率:500 kHz技术:CMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3.9 mmBase Number Matches:1

MAX749ESA 数据手册

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19-0143; Rev 1; 2/95  
Dig it a lly Ad ju s t a b le LCD Bia s S u p p ly  
MAX749  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX749 generates negative LCD-bias contrast  
voltages from 2V to 6V inputs. Full-scale output voltage  
c a n b e s c a le d to -100V or g re a te r, a nd is d ig ita lly  
adjustable in 64 equal steps by an internal digital-to-  
analog converter (DAC). Only seven small surface-  
mount components are required to build a complete  
supply. The output voltage can also be adjusted using  
a PWM signal or a potentiometer.  
+2.0V to +6.0V Input Voltage Range  
Flexible Control of Output Voltage:  
Digital Control  
Potentiometer Adjustment  
PWM Control  
Output Voltage Range Set by One Resistor  
Low, 60µA Max Quiescent Current  
15µA Max Shutdown Mode  
A unique current-limited control scheme reduces supply  
current and maximizes efficiency, while a high switching  
frequency (up to 500kHz) minimizes the size of external  
components. Quiescent current is only 60µA max and is  
reduced to under 15µA in shutdown mode. While shut  
down, the MAX749 retains the voltage set point, simpli-  
fying software control. The MAX749 drives either an  
external P-channel MOSFET or a PNP transistor.  
Small Size – 8-Pin SO and Plastic DIP Packages  
________________________Ap p lic a t io n s  
Notebook Computers  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
8 Plastic DIP  
8 SO  
Laptop Computers  
MAX749CPA  
MAX749CSA  
MAX749C/D  
MAX749EPA  
MAX749ESA  
Palmtop Computers  
0°C to +70°C  
Personal Digital Assistants  
Communicating Computers  
Portable Data-Collection Terminals  
0°C to +70°C  
Dice*  
-40°C to +85°C  
-40°C to +85°C  
8 Plastic DIP  
8 SO  
* Contact factory for dice specifications.  
__________Typ ic a l Op e ra t in g Circ u it  
__________________P in Co n fig u ra t io n  
V
IN  
+5V  
TOP VIEW  
R
SENSE  
0.1µF  
1
2
8
7
V+  
CS  
1
2
3
4
8
7
6
5
V+  
ADJ  
CS  
ADJ  
DHI  
MAX749  
DIGITAL  
ADJUST  
DHI  
-V  
OUT  
MAX749  
6
5
3
4
CTRL  
FB  
DLOW  
GND  
DLOW  
CTRL  
FB  
ON/OFF  
GND  
R
FB  
DIP/SO  
C
COMP  
_______________________________________________________________ Maxim Integrated Products  
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .  

MAX749ESA 替代型号

型号 品牌 替代类型 描述 数据表
MAX749CSA+ MAXIM

完全替代

Switching Controller, Current-mode, 500kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INCH, SO
MAX749ESA+ MAXIM

完全替代

Switching Controller, Current-mode, 500kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INCH, SO
MAX749CSA+T MAXIM

完全替代

Switching Controller, Current-mode, 500kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INCH, SO

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