LM2941_15 Datasheet, PDF (1/29 Pages) Texas Instruments – LM2941x 1-A Low Dropout Adjustable Regulator

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LM2941, LM2941C
SNVS770I – JUNE 1999 – REVISED JANUARY 2015
LM2941x 1-A Low Dropout Adjustable Regulator
1 Features
•1 Operating V_IN Range: 6 V to 26 V
• Output Voltage Adjustable From 5 V to 20 V
• Dropout Voltage Typically 0.5 V at I_OUT = 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
2 Applications
• Industrial
• Automotive
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 (V_IN − V_OUT ≤ 3 V).
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
WSON (8)
4.00 mm x 4.00 mm
LM2941
TO-263 (5)
TO-220 (5)
10.16 mm x 8.42 mm
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
LM2941C
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.
V_IN
6 V to 26 V
C_IN
470 nF
Simplified Schematic
LM2941
IN
OUT
R2
V_OUT
5 V to 20 V
C_OUT
22 µF
ON/OFF
ADJ
R1
GND
LOAD
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.