LM2940T-10 National Semiconductor, LM2940T-10 Datasheet

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LM2940T-10

Manufacturer Part Number
LM2940T-10
Description
Manufacturer
National Semiconductor
Datasheets

Specifications of LM2940T-10

Case
TO220-3L
Date_code
09+

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2940T-10.0
Manufacturer:
NS
Quantity:
1 000
Company:
Part Number:
LM2940T-10.0/NOPB
Manufacturer:
TI
Quantity:
5 000
© 2003 National Semiconductor Corporation
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
C
OUT
SOT-223
Range
J
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
J
J
J
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
IN
− 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
10
00882203
LM2940CT-12
LM2940CS-12
LM2940LD-12
LM2940T-12
LM2940S-12
LM2940IMP-12
L56B
12
@
LM2940CT-15
LM2940CS-15
LM2940LD-15
LM2940LDX-15
LM2940IMP-15
I
O
= 1A
L70B
15
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
SOT-223
in Tape
and Reel
Package

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