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LM2937IMPX-15/NOPB

更新时间： 2024-11-20 12:02:47
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德州仪器 - TI 稳压器
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24页 1991K
描述
LM2937 500 mA Low Dropout Regulator

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LM2937IMPX-15/NOPB 数据手册

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LM2937  
www.ti.com  
SNVS100E –MARCH 2000–REVISED APRIL 2013  
LM2937 500 mA Low Dropout Regulator  
Check for Samples: LM2937  
1
FEATURES  
DESCRIPTION  
The LM2937 is a positive voltage regulator capable of  
supplying up to 500 mA of load current. The use of a  
PNP power transistor provides a low dropout voltage  
characteristic. With a load current of 500 mA the  
minimum input to output voltage differential required  
for the output to remain in regulation is typically 0.5V  
(1V ensured maximum over the full operating  
temperature range). Special circuitry has been  
incorporated to minimize the quiescent current to  
typically only 10 mA with a full 500 mA load current  
when the input to output voltage differential is greater  
than 3V.  
2
•
Fully Specified for Operation Over −40°C to  
+125°C  
•
•
Output Current in Excess of 500 mA  
Output Trimmed for 5% Tolerance Under all  
Operating Conditions  
•
Typical Dropout Voltage of 0.5V at Full Rated  
Load Current  
•
•
Wide Output Capacitor ESR Range, up to 3Ω  
Internal Short Circuit and Thermal Overload  
Protection  
•
•
•
Reverse Battery Protection  
The LM2937 requires an output bypass capacitor for  
stability. As with most low dropout regulators, the  
ESR of this capacitor remains a critical design  
parameter, but the LM2937 includes special  
60V Input Transient Protection  
Mirror Image Insertion Protection  
compensation  
circuitry  
that  
relaxes  
ESR  
requirements. The LM2937 is stable for all ESR  
below 3Ω. This allows the use of low ESR chip  
capacitors.  
Ideally suited for automotive applications, the LM2937  
will protect itself and any load circuitry from reverse  
battery connections, two-battery jumps and up to  
+60V/−50V load dump transients. Familiar regulator  
features such as short circuit and thermal shutdown  
protection are also built in.  
Connection Diagrams  
Front View  
Front View  
Figure 1. TO-220 Plastic Package  
See Package Number NDE0003B  
Figure 2. SOT-223 Plastic Package  
See Package Number DCY0004A  
Top View  
Side View  
Figure 3. DDPAK/TO-263 Surface-Mount Package  
See Package Number KTT0003B  
Figure 4. DDPAK/TO-263 Surface-Mount Package  
See Package Number KTT0003B  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2000–2013, Texas Instruments Incorporated  
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LM2937IMPX-15/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2937IMP-15/NOPB TI

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