Datasheet

LM2941, LM2941C
www.ti.com SNVS770G –JUNE 1999–REVISED APRIL 2013
Electrical Characteristics—LM2941T, LM2941S, LM2941LD (continued)
5V ≤ V
O
≤ 20V, V
IN
= V
O
+ 5V, C
O
= 22μF, unless otherwise specified. Specifications in standard typeface apply for T
J
= 25°C,
while those in boldface type apply over the full Operating Temperature Range.
LM2941T
LM2941S Units
Parameter Conditions Typ
LM2941LD (Limits)
Limit
10Hz–100kHz
RMS Output Noise, % of V
OUT
0.003 %
I
O
= 5mA
Ripple Rejection f
O
= 120Hz, 1 Vrms, I
L
= 100mA 0.005 0.02/0.04 %/V(max)
Long Term Stability 0.4 %/1000 Hr
I
O
= 1A 0.5 0.8/1.0 V(max)
Dropout Voltage
I
O
= 100mA 110 200/200 mV(max)
Short Circuit Current V
IN
Max = 26V
(2)
1.9 1.6 A(min)
Maximum Line Transient V
O
Max 1V Above Nominal V
O
75 60/60 V(min)
R
O
= 100, t ≤ 100ms
Maximum Operational Input Voltage 31 26/26 V
DC
Reverse Polarity
R
O
= 100, V
O
≥ −0.6V −30 −15/−15 V(min)
DC Input Voltage
Reverse Polarity
t ≤ 100ms, R
O
= 100Ω −75 −50/−50 V(min)
Transient Input Voltage
ON/OFF Threshold
I
O
≤ 1A 1.30 0.80/0.80 V(max)
Voltage ON
ON/OFF Threshold
I
O
≤ 1A 1.30 2.00/2.00 V(min)
Voltage OFF
ON/OFF Threshold
V
ON/OFF
= 2.0V, I
O
≤ 1A 50 100/300 μA(max)
Current
(2) Output current capability will decrease with increasing temperature, but will not go below 1A at the maximum specified temperatures.
Electrical Characteristics—LM2941CT, LM2941CS
5V ≤ V
O
≤ 20V, V
IN
= V
O
+ 5V, C
O
= 22μF, unless otherwise specified. Specifications in standard typeface apply for T
J
= 25°C,
while those in boldface type apply over the full Operating Temperature Range.
Limit Units
Parameter Conditions Typ
(1)
(Limits)
1.237/1.211 V(min)
Reference Voltage 5mA ≤ I
O
≤ 1A
(2)
1.275
1.313/1.339 V(max)
Line Regulation V
O
+ 2V ≤ V
IN
≤ 26V, I
O
= 5mA 4 10 mV/V(max)
Load Regulation 50mA ≤ I
O
≤ 1A 7 10 mV/V(max)
100 mADC and 20 mArms
Output Impedance 7 mΩ/V
f
O
= 120Hz
V
O
+ 2V ≤ V
IN
< 26V, I
O
= 5mA 10 15 mA(max)
Quiescent Current
V
IN
= V
O
+ 5V, I
O
= 1A 30 45/60 mA(max)
RMS Output Noise, 10Hz–100kHz
0.003 %
% of V
OUT
I
O
= 5mA
Ripple Rejection f
O
= 120Hz, 1 Vrms, I
L
= 100mA 0.005 0.02 %/V(max)
Long Term Stability 0.4 %/1000 Hr
I
O
= 1A 0.5 0.8/1.0 V(max)
Dropout Voltage
I
O
= 100mA 110 200/200 mV(max)
Short Circuit Current V
IN
Max = 26V
(3)
1.9 1.6 A(min)
(1) All limits specified at room temperature (standard typeface) and at temperature extremes (boldface type). All room temperature limits are
100% production tested. All limits at temperature extremes are ensured via correlation using standard Statistical Quality Control (SQC)
methods.
(2) The output voltage range is 5V to 20V and is determined by the two external resistors, R1 and R2. See Typical Application Circuit.
(3) Output current capability will decrease with increasing temperature, but will not go below 1A at the maximum specified temperatures.
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