Datasheet > LM2937

LM2937

更新时间： 2024-11-21 22:55:43

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
11页	311K
描述
500 mA Low Dropout Regulator

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LM2937 数据手册

March 2000

LM2937

500 mA Low Dropout Regulator

nections, 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.

General Description

The LM2937 is a positive voltage regulator capable of sup-

plying 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 guaranteed maximum over the full operat-

ing temperature range). Special circuitry has been incorpo-

rated to minimize the quiescent current to typically only

10 mA with a full 500 mA load current when the input to out-

put voltage differential is greater than 3V.

Features

n Fully specified for operation over −40˚C to +125˚C

n Output current in excess of 500 mA

n Output trimmed for 5% tolerance under all operating

conditions

n Typical dropout voltage of 0.5V at full rated load current

n Wide output capacitor ESR range, up to 3Ω

n Internal short circuit and thermal overload protection

n Reverse battery protection

n 60V input transient protection

n Mirror image insertion protection

The LM2937 requires an output bypass capacitor for stabil-

ity. As with most low dropout regulators, the ESR of this ca-

pacitor remains a critical design parameter, but the LM2937

includes special compensation circuitry that relaxes ESR re-

quirements. 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 con-

Connection Diagram and Ordering Information

TO-220 Plastic Package

SOT-223 Plastic Package

DS011280-2

DS011280-26

Front View

Order Number LM2937ET-5.0, LM2937ET-8.0,

Order Number LM2937IMP-5.0,

LM2937IMP-8.0, LM2937IMP-10,

LM2937IMP-12 or LM2937IMP-15

See NS Package Number MP04A

LM2937ET-10, LM2937ET-12 or LM2937ET-15

See NS Package Number T03B

TO-263 Surface-Mount Package

DS011280-6

Side View

DS011280-5

Top View

Order Number LM2937ES-5.0, LM2937ES-8.0,

LM2937ES-10, LM2937ES-12 or LM2937ES-15

See NS Package Number TS3B

DS011280

www.national.com

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与LM2937相关器件

型号	品牌	获取价格	描述	数据表
LM2937_11	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR
LM2937_17	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR
LM2937-10.0(5TO-263)	UTC	获取价格	Regulator, 1 Output, BIPolar
LM2937-10.0(TO-220)	UTC	获取价格	Regulator, 1 Output, BIPolar
LM2937-10.0(TO-263)	UTC	获取价格	Regulator, 1 Output, BIPolar
LM2937-10.0(TO-263-5)	UTC	获取价格	Regulator, 1 Output, BIPolar
LM2937-10.0V(T0-263)	UTC	获取价格	Regulator, 1 Output, BIPolar,
LM2937-10-TA3-R	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR
LM2937-10-TQ2-R	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR
LM2937-10-TQ3-R	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR

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