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LM2937

更新时间： 2024-11-22 11:34:35
品牌 Logo 应用领域
友顺 - UTC 稳压器
页数 文件大小 规格书
10页 223K
描述
500mA LOW DROPOUT VOLTAGE REGULATOR

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LM2937 数据手册

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UNISONIC TECHNOLOGIES CO., LTD  
LM2937  
LINEAR INTEGRATED CIRCUIT  
500mA LOW DROPOUT  
VOLTAGE REGULATOR  
1
TO-220  
„
DESCRIPTION  
The UTC LM2937 is a positive voltage regulator capable of  
supplying up to 500mA of load current. The use of a PNP power  
transistor provides a low dropout voltage characteristic. With a  
load current of 500mA the minimum input to output voltage  
differential required for the output to remain in regulation is  
typically 0.5V(1V guaranteed maximum over the full operating  
temperature range). Special circuitry has been incorporated to  
minimize the quiescent current to typically only 10mA with a full  
500mA load current when the input to output voltage differential is  
greater than 3V.  
1
TO-263  
1
TO-263-3  
The UTC 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 compensation circuitry that relaxes ESR  
requirements. The UTC LM2937 is stable for all ESR below  
3Ω.This allows the use of low ESR chip capacitors.  
1
TO-263-5  
Ideally suited for automotive applications, the UTC 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.  
„
FEATURES  
* Fully specified for operation over -40°C~ +125°C  
* Output current in excess of 500mA  
* 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 3ꢀ  
* Reverse battery protection  
* Internal short circuit and thermal overload protection  
* 60V input transient protection  
* Mirror image insertion protection  
* Built-in ON/OFF control function  
„ ORDERING INFORMATION  
Order Number  
Package  
Packing  
Lead Free  
Halogen Free  
LM2937L-xx-TA3-T  
LM2937L-xx-TQ2-R  
LM2937L-xx-TQ2-T  
LM2937L-xx-TQ3-R  
LM2937L-xx-TQ3-T  
LM2937L-xx-TQ5-R  
LM2937L-xx-TQ5-T  
LM2937G-xx-TA3-T  
LM2937G-xx-TQ2-R  
LM2937G-xx-TQ2-T  
LM2937G-xx-TQ3-R  
LM2937G-xx-TQ3-T  
LM2937G-xx-TQ5-R  
LM2937G-xx-TQ5-T  
TO-220  
TO-263  
Tube  
Tape Reel  
Tube  
TO-263  
TO-263-3  
TO-263-3  
TO-263-5  
TO-263-5  
Tape Reel  
Tube  
Tape Reel  
Tube  
www.unisonic.com.tw  
1 of 10  
Copyright © 2011 Unisonic Technologies Co., Ltd  
QW-R102-012.G  
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