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LM2940IMP-5.0 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce LM2940IMP-5.0
Description  1A Low Dropout Regulator
Download  37 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM2940IMP-5.0 Fiches technique(HTML) 1 Page - Texas Instruments

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VIN
Unregulated Input
VOUT
Regulated Output
C1*
0.47 µF
COUT**
22 µF
LM2940
IQ
+
IN
OUT
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LM2940-N, LM2940C
SNVS769J – MARCH 2000 – REVISED DECEMBER 2014
LM2940x 1-A Low Dropout Regulator
1 Features
3 Description
The
LM2940-N
and
LM2940C
positive
voltage
1
Input Voltage Range = 6 V to 26 V
regulators feature the ability to source 1 A of output
Dropout Voltage Typically 0.5 V at IOUT = 1 A
current with a dropout voltage of typically 0.5 V and a
Output Current in Excess of 1 A
maximum of 1 V over the entire temperature range.
Furthermore, a quiescent current reduction circuit has
Output Voltage Trimmed Before Assembly
been included which reduces the ground current
Reverse Battery Protection
when the differential between the input voltage and
Internal Short Circuit Current Limit
the output voltage exceeds approximately 3 V. The
quiescent current with 1 A of output current and an
Mirror Image Insertion Protection
input-output differential of 5 V is therefore only 30
P+ Product Enhancement Tested
mA. Higher quiescent currents only exist when the
regulator is in the dropout mode (VIN − VOUT ≤ 3 V).
2 Applications
Designed also for vehicular applications, the LM2940-
Post Regulator for Switching Supplies
N and LM2940C and all regulated circuitry are
Logic Power Supplies
protected from reverse battery installations or 2-
Industrial Instrumentation
battery jumps. During line transients, such as load
dump when the input voltage can momentarily
space
exceed the specified maximum operating voltage, the
space
regulator will automatically shut down to protect both
space
the internal circuits and the load. The LM2940-N and
LM2940C cannot be harmed by temporary mirror-
image insertion. Familiar regulator features such as
short circuit and thermal overload protection are also
provided.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOT-223 (4)
6.50 mm x 3.50 mm
WSON (8)
4.00 mm x 4.00 mm
LM2940-N
TO-263 (3)
10.18 mm x 8.41 mm
TO-220 (3)
14.986 mm x 10.16 mm
TO-263 (3)
10.18 mm x 8.41 mm
LM2940C
TO-220 (3)
14.986 mm x 10.16 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
*Required if regulator is located far from power supply filter.
**COUT 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.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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