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LT1129CT5 PDF预览

LT1129CT5

更新时间: 2024-11-21 23:48:19
品牌 Logo 应用领域
其他 - ETC 稳压器
页数 文件大小 规格书
16页 224K
描述
IC-LOW DROPOUT REGULATOR

LT1129CT5 数据手册

 浏览型号LT1129CT5的Datasheet PDF文件第2页浏览型号LT1129CT5的Datasheet PDF文件第3页浏览型号LT1129CT5的Datasheet PDF文件第4页浏览型号LT1129CT5的Datasheet PDF文件第5页浏览型号LT1129CT5的Datasheet PDF文件第6页浏览型号LT1129CT5的Datasheet PDF文件第7页 
LT1129/LT1129-3.3/LT1129-5  
Micropower Low Dropout  
Regulators with Shutdown  
U
DESCRIPTIO  
FEATURES  
The LT®1129/LT1129-3.3/LT1129-5 are micropower low  
dropout regulators with shutdown. The devices are ca-  
pableofsupplying700mAofoutputcurrentwithadropout  
voltage of 0.4V at maximum output. Designed for use in  
battery-poweredsystemsthelowquiescentcurrent, 50µA  
operating and 16µA in shutdown, make them an ideal  
choice. The quiescent current does not rise in dropout as  
it does with many other low dropout PNP regulators.  
0.4V Dropout Voltage  
700mA Output Current  
50µA Quiescent Current  
No Protection Diodes Needed  
Adjustable Output from 3.8V to 30V  
3.3V and 5V Fixed Output Voltages  
Controlled Quiescent Current in Dropout  
Shutdown  
16µA Quiescent Current in Shutdown  
Other features of the LT1129 /LT1129-3.3/LT1129-5 in-  
clude the ability to operate with small output capacitors.  
They are stable with only 3.3µF on the output while most  
older devices require between 10µF and 100µF for stabil-  
ity. Alsotheinputmaybeconnectedtogroundorareverse  
voltage without reverse current flow from output to input.  
This makes the LT1129/LT1129-3.3/LT1129-5 ideal for  
backuppowersituationswheretheoutputisheldhighand  
theinputisatgroundorreversed. Undertheseconditions,  
only 16µA will flow from the output pin to ground. The  
devices are available in 5-lead TO-220, 5-lead DD, 3-lead  
SOT-223 and 20-lead TSSOP packages.  
Stable with 3.3µF Output Capacitor  
Reverse Battery Protection  
No Reverse Output Current  
Thermal Limiting  
Surface Mount SOT-223 and DD Packages  
1.1mm Thick Surface Mount TSSOP Package  
U
APPLICATIO S  
Low Current Regulator  
Regulator for Battery-Powered Systems  
Post Regulator for Switching Supplies  
5V to 3.3V Logic Regulator  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
5V Supply with Shutdown  
Dropout Voltage  
0.6  
5
1
2
5V OUT  
500mA  
IN  
OUT  
0.5  
0.4  
0.3  
+
LT1129-5  
SENSE  
GND  
3.3µF  
SOLID TANTALUM  
V
> 5.5V  
IN  
4
SHDN  
3
0.2  
0.1  
0
V
(PIN 4) OUTPUT  
SHDN  
< 0.25  
> 2.8  
NC  
OFF  
ON  
ON  
LT1129 • TA01  
0.4  
OUTPUT CURRENT (A)  
0.6 0.7  
0
0.1  
0.2 0.3  
0.5  
LT1129 • TA02  
1

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