LM2940/LM2940C
Electrical Characteristics
Output Voltage (V
O
)
Parameter
Maximum Line
Transient
Conditions
R
O
= 100Ω
LM2940, T
≤
100 ms
(Continued)
V
IN
= V
O
+ 5V, I
O
= 1A, C
O
= 22 µF, unless otherwise specified.
Boldface limits apply over the entire operating tempera-
ture range of the indicated device.
All other specifications apply for T
A
= T
J
= 25˚C.
5V
LM2940
Typ
Limit
75
55
−30
−30
−75
−55
60/60
40/40
45
−15/−15
−15
−50/−50
−45/−45
−45/−45
−15/−15
55
−30
−30
−75
45
−15/−15
−15
−50/−50
−45/−45
V
MIN
−15/−15
V
MIN
LM2940/883
Limit
75
Typ
8V
LM2940
Limit
60/60
40/40
LM2940/883
Limit
Units
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
Reverse Polarity
DC Input Voltage
Reverse Polarity
Transient Input
Voltage
R
O
= 100Ω
LM2940, LM2940/883
LM2940C
R
O
= 100Ω
LM2940, T
≤
100 ms
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
V
MIN
Electrical Characteristics
V
IN
= V
O
+ 5V, I
O
= 1A, C
O
= 22 µF, unless otherwise specified.
Boldface limits apply over the entire operating tempera-
ture range of the indicated device.
All other specifications apply for T
A
= T
J
= 25˚C.
Output Voltage (V
O
)
Parameter
Conditions
Typ
9V
LM2940
Limit
10.5V
≤
V
IN
≤
26V
Output Voltage
Line Regulation
Load Regulation
5 mA
≤
I
O
≤1A
V
O
+ 2V
≤
V
IN
≤
26V,
I
O
= 5 mA
50 mA
≤
I
O
≤
1A
LM2940
LM2940C
Output Impedance
100 mADC and
20 mArms,
f
O
= 120 Hz
Quiescent
Current
V
O
+2V
≤
V
IN
<
26V,
I
O
= 5 mA
LM2940
LM2940C
V
IN
= V
O
+ 5V, I
O
= 1A
Output Noise
Voltage
Ripple Rejection
10 Hz − 100 kHz,
I
O
= 5 mA
f
O
= 120 Hz, 1 V
rms
,
I
O
= 100 mA
LM2940
LM2940C
Long Term
Stability
Dropout Voltage
I
O
= 1A
I
O
= 100 mA
64
64
34
0.5
110
5
10V
LM2940
Typ
Limit
11.5V
≤
V
IN
≤
26V
10.00
20
9.70/9.50
10.30/10.50
100
V
MIN
V
MAX
mV
MAX
Units
9.00
20
8.73/8.55
9.27/9.45
90
60
60
60
90/150
90
65
100/165
mV
MAX
65
mΩ
10
10
30
270
15/20
15
45/60
10
30
300
15/20
45/60
mA
MAX
mA
MAX
µV
rms
52/46
52
63
36
51/45
dB
MIN
mV/
1000 Hr
0.8/1.0
150/200
0.5
110
0.8/1.0
150/200
V
MAX
mV
MAX
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