LM2941_07 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – 1A Low Dropout Adjustable Regulator

November 7, 2007
LM2941/LM2941C
1A Low Dropout Adjustable Regulator
General Description
The LM2941 positive voltage regulator features the ability to
source 1A of output current with a typical dropout voltage of
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 pin current when the dif-
ferential between the input voltage and the output voltage
exceeds approximately 3V. The quiescent current with 1A of
output current and an input-output differential of 5V is there-
fore only 30mA. Higher quiescent currents only exist when the
regulator is in the dropout mode (V_IN − V_OUT ≤ 3V).
Designed also for vehicular applications, the LM2941 and all
regulated circuitry are protected from reverse battery instal-
lations 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.
Features
■ ^{LLP space saving package}
■ ^{Output voltage adjustable from 5V to 20V}
■ ^{Dropout voltage typically 0.5V @ I}_O ^{= 1A}
■ ^{Output current in excess of 1A}
■ ^{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}
Connection Diagram and Ordering Information
TO-220 Plastic Package
TO-263 Surface-Mount Package
Top View
882302
Order Number LM2941T or LM2941CT
See NS Package Number TO5A
882308
Order Number LM2941S, LM2941SX or
LM2941CS, LM2941CSX
See NS Package Number TS5B
882309
16-Lead Ceramic Dual-in-Line Package 16-Lead Ceramic Surface Mount
Package
8-Lead LLP Surface Mount Package
Top View
882331
Order Number LM2941J/883
LM2941J-QMLV, 5962-9166701QEA
See NS Package Number J16A
Top View
882332
Order Number LM2941WG/883
LM2941WG-QMLV, 5962-9166701QYA
See NS Package Number WG16A
Top View
882333
Ordering Number LM2941LD,
LM2941LDX
See NS Package Number LDC08A
Note: Pin 2 & 7 are fused to center DAP
© 2007 National Semiconductor Corporation 8823
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