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LT1175CQ-5-PBF

更新时间： 2024-11-13 05:43:23
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
18页 306K
描述
500mA Negative Low Dropout Micropower Regulator

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LT1175CQ-5-PBF 数据手册

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LT1175  
500mA Negative  
Low Dropout Micropower  
Regulator  
FeaTures  
DescripTion  
The LT®1175 is a negative micropower low dropout  
regulator. It features 45µA quiescent current, dropping  
to 10µA in shutdown. A new reference amplifier topology  
gives precision DC characteristics along with the ability to  
maintain good loop stability with an extremely wide range  
of output capacitors. Very low dropout voltage and high  
efficiency are obtained with a unique power transistor  
anti-saturation design. Adjustable and fixed 5V versions  
are available.  
n
Operating Current: 45µA  
n
Adjustable Current Limit  
n
Low Voltage Linear Dropout Characteristics  
n
Stable with Wide Range of Output Capacitors  
n
Shutdown Current: 10µA  
n
Positive or Negative Shutdown Logic  
n
Fixed 5V and Adjustable Versions  
n
Tolerates Reverse Output Voltage  
n
Available in 8-pin PDIP and SO Packages, 3-lead  
SOT-223, 5-Pin Surface Mount DD and Through-Hole  
TO-220 Packages  
Several new features make the LT1175 very user-friendly.  
The SHDN pin can interface directly to either positive or  
negative logic levels. Current limit is user-selectable at  
200mA, 400mA, 600mA and 800mA. The output can be  
forced to reverse voltage without damage or latchup. Un-  
likesomeearlierdesigns,theincreaseinquiescentcurrent  
during a dropout condition is actively limited.  
applicaTions  
n
Analog Systems  
n
Modems  
n
Instrumentation  
n
A/D and D/A Converters  
The LT1175 has complete blowout protection with current  
limiting, power limiting and thermal shutdown. Special  
attention was given to the problem of high temperature  
operation with micropower operating currents, preventing  
output voltage rise under no-load conditions. The LT1175  
is available in 8-pin PDIP and SO packages, 3-lead SOT-  
223 as well as 5-pin surface mount DD and through-hole  
TO-220 packages. The 8-pin SO package is specially  
constructed for low thermal resistance.  
n
Interface Drivers  
n
Battery-Powered Systems  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Typical applicaTion  
Minimum Input-to-Output Voltage  
1.0  
T
= 25°C  
Typical LT1175 Connection  
J
I
, I  
TIED TO V  
LIM2 LIM4 IN  
0.8  
0.6  
0.4  
0.2  
0
+
+
C
OUT  
C
*
IN  
≥ 0.1µF  
SHDN  
GND  
SENSE  
–5V  
UP TO 500mA  
V
–V  
IN  
IN  
I
LT1175-5  
OUTPUT  
LIM2  
I
LIM4  
*C IS NEEDED ONLY IF REGULATOR IS MORE THAN 6" FROM  
IN  
INPUT SUPPLY CAPACITOR. SEE APPLICATIONS INFORMATION  
0
0.2 0.3 0.4  
0.5 0.6 0.7  
0.1  
1175 TA01  
SECTION FOR DETAILS  
OUTPUT CURRENT (A)  
1175 TA02  
1175fe  
ꢀ
1234567...18

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