LM2940-N, LM2940C
SNVS769I –MARCH 2000–REVISED APRIL 2013
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Electrical Characteristics
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
Parameter Conditions
5V
8V
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Units
Limit(2)
Limit(2)
Output Voltage
5 mA ≤ IO ≤ 1A
6.25V ≤ VIN ≤ 26V
9.4V ≤ VIN ≤ 26V
5.00
20
4.85/4.75
5.15/5.25
4.85/4.75
8.00
20
7.76/7.60
8.24/8.40
7.76/7.60
VMIN
5.15/5.25
8.24/8.40
VMAX
Line Regulation
Load Regulation
VO + 2V ≤ VIN ≤ 26V,
IO = 5 mA
50
40/50
80
50/80
mVMAX
mVMAX
50 mA ≤ IO ≤ 1A
LM2940-N, LM2940-N/883
LM2940C
35
35
50/80
50/100
55
55
80/130
80/130
50
80
Output Impedance
Quiescent Current
100 mADC and
20 mArms,
35
1000/1000
55
1000/1000
mΩ
fO = 120 Hz
VO +2V ≤ VIN ≤ 26V,
IO = 5 mA
LM2940-N, LM2940-N/883
LM2940C
10
10
30
15/20
15
15/20
50/60
10
30
15/20
45/60
15/20
50/60
mAMAX
mAMAX
μVrms
VIN = VO + 5V,
IO = 1A
45/60
Output Noise Voltage 10 Hz − 100 kHz,
150
700/700
240
1000/1000
IO = 5 mA
Ripple Rejection
fO = 120 Hz, 1 Vrms
IO = 100 mA
LM2940-N
,
72
72
60/54
66
66
54/48
dBMIN
dBMIN
LM2940C
60
54
fO = 1 kHz, 1 Vrms
IO = 5 mA
,
60/50
54/48
Long Term Stability
Dropout Voltage
20
32
mV/
1000 Hr
VMAX
IO = 1A
0.5
0.8/1.0
0.7/1.0
0.5
0.8/1.0
0.7/1.0
IO = 100 mA
110
150/200
150/200
110
150/200
150/200
mVMAX
(3)
Short Circuit
Current
See
1.9
1.6
1.5/1.3
1.9
1.6
1.6/1.3
AMIN
Maximum Line
Transient
RO = 100Ω
LM2940-N, T ≤ 100 ms
LM2940-N/883, T ≤ 20 ms
LM2940C, T ≤ 1 ms
RO = 100Ω
75
55
60/60
75
55
60/60
VMIN
40/40
40/40
45
45
Reverse Polarity
DC Input Voltage
LM2940-N, LM2940-N/883
LM2940C
−30
−30
−15/−15
−15
−15/−15
−30
−30
−15/−15
−15
−15/−15
VMIN
(1) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits at TA = TJ = 25°C are 100% production tested. All limits at temperature extremes are specified via correlation
using standard Statistical Quality Control methods.
(2) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits are 100% production tested and are used to calculate Outgoing Quality Levels.
(3) Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
4
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