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LT1121HVIS8 PDF预览

LT1121HVIS8

更新时间: 2024-11-07 03:19:59
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
16页 173K
描述
Micropower Low Dropout Regulators with Shutdown

LT1121HVIS8 数据手册

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LT1121/LT1121-3.3/LT1121-5  
Micropower Low Dropout  
Regulators with Shutdown  
U
FEATURES  
DESCRIPTIO  
The LT®1121/LT1121-3.3/LT1121-5 are micropower low  
dropout regulators with shutdown. These devices are  
capable of supplying 150mA of output current with a  
dropout voltage of 0.4V. Designed for use in battery-  
powered systems, the low quiescent current, 30μA oper-  
ating and 16μA in shutdown, makes them an ideal choice.  
The quiescent current is well-controlled; it does not rise in  
dropout as it does with many other low dropout PNP  
regulators.  
0.4V Dropout Voltage  
150mA Output Current  
30μA Quiescent Current  
No Protection Diodes Needed  
Adjustable Output from 3.75V to 30V  
3.3V and 5V Fixed Output Voltages  
Controlled Quiescent Current in Dropout  
Shutdown  
16μA Quiescent Current in Shutdown  
Stable with 0.33μF Output Capacitor  
Other features of the LT1121/LT1121-3.3/LT1121-5 in-  
clude the ability to operate with very small output capaci-  
tors. They are stable with only 0.33μF on the output while  
most older devices require between 1μF and 100μF for  
stability.Smallceramiccapacitorscanbeused,enhancing  
manufacturability. Also the input may be connected to  
ground or a reverse voltage without reverse current flow  
from output to input. This makes the LT1121 series ideal  
for backup power situations where the output is held high  
and the input is at ground or reversed. Under these  
conditions only 16μA will flow from the output pin to  
ground.  
Reverse Battery Protection  
No Reverse Current with Input Low  
Thermal Limiting  
Available in the 8-Lead SO, 8-Lead PDIP, 3-Lead  
SOT-23 and 3-Lead TO-92 Packages  
U
APPLICATIO S  
Low Current Regulator  
Regulator for Battery-Powered Systems  
Post Regulator for Switching Supplies  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
5V Battery-Powered Supply with Shutdown  
Dropout Voltage  
0.5  
8
1
3.3V  
OUT  
IN  
OUT  
LT1121-3.3  
150mA  
0.4  
0.3  
0.2  
0.1  
0
+
1μF  
5V  
SOLID TANTALUM  
5
SHDN  
GND  
3
V
(PIN 5) OUTPUT  
SHDN  
<0.25  
>2.8  
NC  
OFF  
ON  
ON  
LT1121 • TA01  
80  
OUTPUT CURRENT (mA)  
0
20 40 60  
100 120 140 160  
LT1121 • TA02  
1121fe  
1

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