Datasheet

LM2940-N, LM2940C
www.ti.com SNVS769I –MARCH 2000–REVISED APRIL 2013
Electrical Characteristics (continued)
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
) 5V 8V
Parameter Conditions Typ LM2940-N LM2940- Typ LM2940-N LM2940-
Units
Limit
(1)
N/883 Limit
(1)
N/883
Limit
(2)
Limit
(2)
Reverse Polarity R
O
= 100Ω
Transient Input
LM2940-N, T ≤ 100 ms −75 −50/−50 −75 −50/−50 V
MIN
Voltage
LM2940-N/883, T ≤ 20 ms −45/−45 −45/−45
LM2940C, T ≤ 1 ms −55 −45/−45
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
) 9V 10V
LM2940-N LM2940-N
Units
Parameter Conditions Typ Limit Typ Limit
(1) (1)
Output Voltage 10.5V ≤ V
IN
≤ 26V 11.5V ≤ V
IN
≤ 26V
5 mA ≤ I
O
≤1A 9.00 8.73/8.55 10.00 9.70/9.50 V
MIN
9.27/9.45 10.30/10.50 V
MAX
Line Regulation V
O
+ 2V ≤ V
IN
≤ 26V, 20 90 20 100 mV
MAX
I
O
= 5 mA
Load Regulation 50 mA ≤ I
O
≤ 1A
LM2940-N 60 90/150 65 100/165 mV
MAX
LM2940C 60 90
Output Impedance 100 mADC and
20 mArms, 60 65 mΩ
f
O
= 120 Hz
Quiescent Current V
O
+2V ≤ V
IN
< 26V,
I
O
= 5 mA
LM2940-N 10 15/20 10 15/20 mA
MAX
LM2940C 10 15
V
IN
= V
O
+ 5V, I
O
= 1A 30 45/60 30 45/60 mA
MAX
Output Noise Voltage 10 Hz − 100 kHz, 270 300 μV
rms
I
O
= 5 mA
Ripple Rejection f
O
= 120 Hz, 1 V
rms
,
I
O
= 100 mA
LM2940-N 64 52/46 63 51/45 dB
MIN
LM2940C 64 52
Long Term 34 36 mV/
Stability
1000 Hr
Dropout Voltage I
O
= 1A 0.5 0.8/1.0 0.5 0.8/1.0 V
MAX
I
O
= 100 mA 110 150/200 110 150/200 mV
MAX
Short Circuit Current See
(2)
1.9 1.6 1.9 1.6 A
MIN
(1) 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.
(2) Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
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