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LM2940CT-5 PDF预览

LM2940CT-5

更新时间： 2024-11-17 23:46:55
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LM2940CT-5 数据手册

 浏览型号LM2940CT-5的Datasheet PDF文件第2页浏览型号LM2940CT-5的Datasheet PDF文件第3页浏览型号LM2940CT-5的Datasheet PDF文件第4页浏览型号LM2940CT-5的Datasheet PDF文件第5页浏览型号LM2940CT-5的Datasheet PDF文件第6页浏览型号LM2940CT-5的Datasheet PDF文件第7页 
June 1999  
LM2940/LM2940C  
1A Low Dropout Regulator  
momentarily exceed the specified maximum operating volt-  
age, the regulator will automatically shut down to protect  
both the internal circuits and the load. The LM2940/  
LM2940C cannot be harmed by temporary mirror-image in-  
sertion. Familiar regulator features such as short circuit and  
thermal overload protection are also provided.  
General Description  
The LM2940/LM2940C positive voltage regulator features  
the ability to source 1A of output current with a dropout volt-  
age of typically 0.5V and a maximum of 1V over the entire  
temperature range. Furthermore, a quiescent current reduc-  
tion circuit has been included which reduces the ground cur-  
rent when the differential between the input voltage and the  
output voltage exceeds approximately 3V. The quiescent  
current with 1A of output current and an input-output differ-  
ential of 5V is therefore only 30 mA. Higher quiescent cur-  
rents only exist when the regulator is in the dropout mode  
(VIN − VOUT ≤ 3V).  
Features  
=
@
n Dropout voltage typically 0.5V IO 1A  
n Output current in excess of 1A  
n Output voltage trimmed before assembly  
n Reverse battery protection  
Designed also for vehicular applications, the LM2940/  
LM2940C and all regulated circuitry are protected from re-  
verse battery installations or 2-battery jumps. During line  
transients, such as load dump when the input voltage can  
n Internal short circuit current limit  
n Mirror image insertion protection  
n P+ Product Enhancement tested  
Typical Application  
DS008822-3  
*
Required if regulator is located far from power supply filter.  
**  
C
OUT  
must be at least 22 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible  
to the regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.  
Ordering Information  
Temperature  
Range  
Output Voltage  
9.0  
Package  
5.0  
8.0  
10  
12  
15  
0˚C ≤ TA ≤ 125˚C  
−40˚C ≤ TA ≤ 125˚C  
−40˚C ≤ TA ≤ 85˚C  
LM2940CT-5.0  
LM2940CS-5.0  
LM2940T-5.0  
LM2940S-5.0  
LM2940CT-9.0  
LM2940CS-9.0  
LM2940T-9.0  
LM2940S-9.0  
LM2940CT-12  
LM2940CS-12  
LM2940T-12  
LM2940S-12  
LM2940CT-15  
LM2940CS-15  
TO-220  
TO-263  
TO-220  
TO-263  
LM2940T-8.0  
LM2940S-8.0  
LM2940T-10  
LM2940S-10  
LM2940IMP-5.0 LM2940IMP-8.0 LM2940IMP-9.0 LM2940IMP-10 LM2940IMP-12 LM2940IMP-15 SOT-223  
L53B L54B L0EB L55B L56B L70B  
SOT-223 Package  
Marking  
The physical size of the SOT-223 is too small to contain the full device part number. The package markings indicated are what will appear on the actual device.  
Temperature  
Range  
Output Voltage  
Package  
5.0  
8.0  
12  
15  
−55˚C ≤ TA ≤ 125˚C  
LM2940J-5.0/883  
5962-8958701EA  
LM2940J-8.0/883  
5962-9088301QEA  
LM2940J-12/883  
5962-9088401QEA  
LM2940J-15/883  
5962-9088501QEA  
J16A  
LM2940WG5.0/883  
5962-8958701XA  
WG16A  
For information on military temperature range products, please go to the Mil/Aero Web Site at http://www.national.com/appinfo/milaero/index.html.  
© 1999 National Semiconductor Corporation  
DS008822  
www.national.com  
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