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LM2940S50 数据手册 - National Semiconductor（美国国家半导体）
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LM2940S50数据手册
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM2940S, J, WG, T, MP ≤ 100
ms
60V
LM2940CS, T ≤ 1 ms
45V
Internal Power Dissipation
(Note 2)
Internally Limited
Maximum Junction Temperature 150°C
Storage Temperature Range
−65°C ≤ T
J
≤ +150°C
Soldering Temperature (Note 3)
TO-220 (T), Wave 260°C, 10s
TO-263 (S) 235°C, 30s
SOT-223 (MP) 260°C, 30s
LLP-8 (LD) 235°C, 30s
ESD Susceptibility (Note 4) 2 kV
Operating Conditions (Note 1)
Input Voltage 26V
Temperature Range
LM2940T, LM2940S
−40°C ≤ T
J
≤ 125°C
LM2940CT, LM2940CS
0°C ≤ T
J
≤ 125°C
LM2940IMP
−40°C ≤ T
A
≤ 85°C
LM2940J, LM2940WG
−55°C ≤ T
J
≤ 125°C
LM2940LD
−40°C ≤ T
J
≤ 125°C
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
) 5V 8V
Units
LM2940 LM2940/883 LM2940 LM2940/883
Parameter Conditions Typ Limit Limit Typ Limit Limit
(Note 5) (Note 6)
(Note 5) (Note 6)
6.25V ≤ V
IN
≤ 26V 9.4V ≤ V
IN
≤ 26V
Output Voltage
5 mA ≤ I
O
≤ 1A
5.00 4.85/4.75 4.85/4.75 8.00 7.76/7.60 7.76/7.60
V
MIN
5.15/5.25 5.15/5.25 8.24/8.40 8.24/8.40 V
MAX
Line Regulation
V
O
+ 2V ≤ V
IN
≤ 26V,
20 50 40/50 20 80 50/80
mV
MAX
I
O
= 5 mA
Load Regulation
50 mA ≤ I
O
≤ 1A
LM2940, LM2940/883 35 50/80 50/100 55 80/130 80/130 mV
MAX
LM2940C 35 50 55 80
Output 100 mADC and
Impedance 20 mArms, 35 1000/1000 55 1000/1000
mΩ
f
O
= 120 Hz
Quiescent
V
O
+2V ≤ V
IN
≤ 26V,
Current I
O
= 5 mA
LM2940, LM2940/883 10 15/20 15/20 10 15/20 15/20 mA
MAX
LM2940C 10 15
V
IN
= V
O
+ 5V,
30 45/60 50/60 30 45/60 50/60
mA
MAX
I
O
= 1A
Output Noise 10 Hz − 100 kHz,
150
700/700 240
1000/1000
μV
rms
Voltage I
O
= 5 mA
Ripple Rejection f
O
= 120 Hz, 1 V
rms
,
I
O
= 100 mA
LM2940 72 60/54 66 54/48 dB
MIN
LM2940C 72 60 66 54
f
O
= 1 kHz, 1 V
rms
,
60/50
54/48
dB
MIN
I
O
= 5 mA
Long Term 20 32 mV/
Stability 1000 Hr
Dropout Voltage I
O
= 1A 0.5 0.8/1.0 0.7/1.0 0.5 0.8/1.0 0.7/1.0 V
MAX
I
O
= 100 mA 110 150/200 150/200 110 150/200 150/200 mV
MAX
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