Datasheet > LM2940-15

LM2940-15

更新时间： 2024-11-24 23:46:55

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LM2940-15 数据手册

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

(V_IN− V_OUT≤ 3V).

Features

n Dropout voltage typically 0.5V I_O1A

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.

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

0˚C ≤ T_A≤ 125˚C

−40˚C ≤ T_A≤ 125˚C

−40˚C ≤ T_A≤ 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

−55˚C ≤ T_A≤ 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.

DS008822

www.national.com

12 3 4 5 6 7...17

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与LM2940-15相关器件

型号	品牌	获取价格	描述	数据表
LM2940-15(16DIP)	UTC	获取价格	Regulator, 1 Output, BIPolar, PDIP16,
LM2940-15(16SOP)	UTC	获取价格	Regulator, 1 Output, BIPolar, PDSO16,
LM2940-15(TO-263-3)	UTC	获取价格	Regulator, 1 Output, BIPolar,
LM2940-15-AA3-D-R	UTC	获取价格	Regulator
LM2940-15-AA3-R	UTC	获取价格	1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
LM2940-15-AA3-T	UTC	获取价格	1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
LM2940-15-D16-T	UTC	获取价格	Regulator
LM2940-15-S16-T	UTC	获取价格	Regulator
LM2940-15-TA3-R	UTC	获取价格	1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
LM2940-15-TA3-T	UTC	获取价格	1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR

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