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参数资料
| 型号： | LM78XXA |
| 厂商： | Fairchild Semiconductor Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正电压稳压器 |
| 文件页数： | 17/28页 |
| 文件大小： | 570K |
| 代理商： | LM78XXA |
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17
www.fairchildsemi.com
LM78XX/LM78XXA Rev. 1.0.1
L
Electrical Characteristics (LM7812A)
(Continued)
Refer to the test circuits. 0°C
<
T
J
<
125°C, I
O
= 1A, V
I
= 19V, C
I
= 0.33
μ
F, C
O
= 0.1
μ
F, unless otherwise specified.
Note:
29. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
30. These parameters, although guaranteed, are not 100% tested in production.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
V
O
Output Voltage
T
J
= +25°C
I
O
= 5mA to 1A, P
O
≤
15W,
V
I
= 14.8V to 27V
V
I
= 14.8V to 30V, I
O
= 500mA
V
I
= 16V to 22V
T
J
= +25°C
V
I
= 14.5V to 27V
V
I
= 16V to 22V
T
J
= +25°C, I
O
= 5mA to 1.5A
I
O
= 5mA to 1A
I
O
= 250mA to 750mA
T
J
= +25°C
11.75
12.0
12.25
V
11.5
12.0
12.5
Regline
Line Regulation
(29)
–
10.0
120
mV
–
4.0
120
–
10.0
120
–
3.0
60.0
Regload
Load Regulation
(29)
–
12.0
100
mV
–
12.0
100
–
5.0
50.0
I
Q
I
Q
Quiescent Current
–
5.1
6.0
mA
Quiescent Current Change I
O
= 5mA to 1A
–
–
0.5
mA
V
I
= 14V to 27V, I
O
= 500mA
V
I
= 15V to 30V, T
J
= +25°C
I
O
= 5mA
f = 10Hz to 100kHz, T
A
= +25°C
f = 120Hz, I
O
= 500mA,
V
I
= 14V to 24V
I
O
= 1A, T
J
= +25°C
f = 1kHz
–
–
0.8
–
–
0.8
V
O
/
T
V
N
RR
Output Voltage Drift
(30)
–
-1.0
–
mV/°C
Output Noise Voltage
Ripple Rejection
(30)
–
10.0
–
μ
V/V
O
dB
–
60.0
–
V
DROP
r
O
I
SC
I
PK
Dropout Voltage
Output Resistance
(30)
–
2.0
–
V
–
18.0
–
m
Short Circuit Current
Peak Current
(30)
V
I
= 35V, T
A
= +25°C
T
J
= +25°C
–
250
–
mA
–
2.2
–
A
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