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lm2941ct datasheet - pdf download free

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LM2941, LM2941C
SNVS770I – JUNE 1999 – REVISED JANUARY 2015
LM2941x 1-A Low Dropout Adjustable Regulator
1 Features
3 Description











The LM2941 positive voltage regulator features the
ability to source 1 A of output current with a typical
dropout voltage of 0.5 V and a maximum of 1 V over
the entire temperature range. Furthermore, a
quiescent current reduction circuit has been included
which reduces the ground pin current when the
differential between the input voltage and the output
voltage exceeds approximately 3 V. The quiescent
current with 1 A of output current and an input-output
differential of 5 V is therefore only 30 mA. Higher
quiescent currents only exist when the regulator is in
the dropout mode (VIN − VOUT ≤ 3 V).
1
Operating VIN Range: 6 V to 26 V
Output Voltage Adjustable From 5 V to 20 V
Dropout Voltage Typically 0.5 V at IOUT = 1 A
Output Current in Excess of 1 A
Trimmed Reference Voltage
Reverse Battery Protection
Internal Short-Circuit Current Limit
Mirror Image Insertion Protection
P+ Product Enhancement Tested
TTL, CMOS Compatible ON/OFF Switch
WSON Space-Saving Package
Designed also for vehicular applications, the LM2941
and all regulated circuitry are protected from reverse
battery installations or two-battery jumps. During line
transients, such as load dump when the input voltage
can momentarily exceed the specified maximum
operating voltage, the regulator will automatically shut
down to protect both the internal circuits and the load.
Familiar regulator features such as short circuit and
thermal overload protection are also provided.
2 Applications


Industrial
Automotive
Device Information(1)
PART NUMBER
LM2941
LM2941C
PACKAGE
BODY SIZE (NOM)
WSON (8)
4.00 mm x 4.00 mm
TO-263 (5)
10.16 mm x 8.42 mm
TO-220 (5)
14.986 mm x 10.16 mm
TO-220 (5)
10.16 mm x 8.51 mm
TO-263 (5)
10.16 mm x 8.42 mm
TO-220 (5)
14.986 mm x 10.16 mm
TO-220 (5)
10.16 mm x 8.51 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VIN
VOUT
LM2941
6 V to 26 V
CIN
470 nF
IN
5 V to 20 V
OUT
R2
ON/OFF
ADJ
COUT