LM2940T-10 National Semiconductor, LM2940T-10 Datasheet

LM2940T-10

Manufacturer Part Number

LM2940T-10

Description

Manufacturer

National Semiconductor

Datasheets

1.LM2940T-9.0.pdf (19 pages)

2.LM2940T-9.0.pdf (17 pages)

Specifications of LM2940T-10

Case

TO220-3L

Date_code

09+

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM2940T-10

Manufacturer:

Quantity:

20 000

Company:

BOSTOCK HK LIMITED

Part Number:

LM2940T-10.0

Manufacturer:

Quantity:

1 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM2940T-10.0/NOPB

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NS/国半

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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.

0˚C ≤ T

−40˚C ≤ T

125˚C

−40˚C ≤ T

125˚C

−40˚C ≤ T

85˚C

LM2940/LM2940C

1A Low Dropout Regulator

General Description

The LM2940/LM2940C positive voltage regulator features

the ability to source 1A of output current with a dropout

voltage of typically 0.5V and a maximum of 1V over the

entire temperature range. Furthermore, a quiescent current

reduction circuit has been included which reduces the

ground current when the differential between the input volt-

age and the output voltage exceeds approximately 3V. The

quiescent current with 1A of output current and an input-

output differential of 5V is therefore only 30 mA. Higher

quiescent currents only exist when the regulator is in the

dropout mode (V

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

Typical Application

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

Package Marking

Required if regulator is located far from power supply filter.

Temperature

OUT

SOT-223

Range

must be at least 22 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible

≤ 125˚C

≤

LM2940CT-5.0

LM2940CS-5.0

LM2940LD-5.0

LM2940LDX-5.0

LM2940T-5.0

LM2940S-5.0

LM2940IMP-5.0

LM2940IMPX-5.0 LM2940IMPX-8.0 LM2940IMPX-9.0 LM2940IMPX-10 LM2940IMPX-12 LM2940IMPX-15

− V

L53B

5.0

OUT

≤ 3V).

LM2940T-8.0

LM2940S-8.0

LM2940IMP-8.0

LM2940LDX-8.0 LM2940LDX-9.0

LM2940LD-8.0

L54B

8.0

DS008822

LM2940CT-9.0

LM2940CS-9.0

LM2940LD-9.0

LM2940T-9.0

LM2940S-9.0

LM2940IMP-9.0

L0EB

9.0

Output Voltage

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.

Features

n Dropout voltage typically 0.5V

n Output current in excess of 1A

n Output voltage trimmed before assembly

n Reverse battery protection

n Internal short circuit current limit

n Mirror image insertion protection

n P

LM2940T-10

LM2940S-10

LM2940IMP-10

LM2940LDX-10 LM2940LDX-12

LM2940LD-10

Product Enhancement tested

L55B

00882203

LM2940CT-12

LM2940CS-12

LM2940LD-12

LM2940T-12

LM2940S-12

LM2940IMP-12

L56B

LM2940CT-15

LM2940CS-15

LM2940LD-15

LM2940LDX-15

LM2940IMP-15

= 1A

L70B

January 2003

www.national.com

TO-220

TO-263

LLP 1k

Units

Tape and

Reel

LLP 4.5k

Units

Tape and

Reel

TO-220

TO-263

SOT-223

in Tape

and Reel

Package

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