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