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参数资料
| 型号： | L78XX |
| 厂商： | 意法半导体 |
| 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： | 6/23页 |
| 文件大小： | 264K |
| 代理商： | L78XX |
ELECTRICALCHARACTERISTICS FOR L7812
(refer to the test circuits, T
j
= -55 to 150
o
C,
V
i
= 19V, I
o
= 500 mA,C
i
= 0.33
μ
F, C
o
= 0.1
μ
F unlessotherwise specified)
Symbol
Parameter
Test Conditions
T
j
= 25
o
C
V
o
OutputVoltage
I
o
= 5mA to1 A
V
i
= 15.5 to 27 V
V
o
*
Line Regulation
V
i
= 14.5 to 30 V
V
i
= 16 to 22 V
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
I
o
= 250 to 750mA
I
d
Quiescent Current
T
j
= 25
o
C
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
I
d
Quiescent Current Change
V
i
= 15 to 30 V
V
o
T
eN
OutputNoise Voltage
B = 10Hz to100KHz T
j
= 25
o
C
SVR
Supply Voltage Rejection
V
i
= 15 to 25 V
V
d
Dropout Voltage
I
o
= 1 A
R
o
OutputResistance
f = 1 KHz
I
sc
Short Circuit Current
V
i
= 35 V
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
Min.
Typ.
Max.
Unit
V
o
OutputVoltage
11.5
12
12.5
V
P
o
≤
15W
11.4
12
12.6
V
T
j
= 25
o
C
T
j
=25
o
C
T
j
=25
o
C
T
j
=25
o
C
120
60
mV
mV
100
60
mV
mV
6
mA
0.5
mA
0.8
mA
mV/
o
C
OutputVoltage Drift
I
o
= 5mA
1.5
40
μ
V/V
O
dB
f = 120 Hz
61
T
j
=25
o
C
2
2.5
V
18
m
A
T
j
=25
o
C
0.75
1.2
1.3
2.2
3.3
A
ELECTRICALCHARACTERISTICS FOR L7808
(refer to the test circuits, T
j
= -55 to 150
o
C,
V
i
= 14V, I
o
= 500 mA,C
i
= 0.33
μ
F, C
o
= 0.1
μ
F unlessotherwise specified)
Symbol
Parameter
Test Conditions
V
o
OutputVoltage
T
j
= 25
o
C
V
o
OutputVoltage
I
o
= 5mA to1 A
V
i
= 11.5 to 23 V
V
o
*
Line Regulation
V
i
= 10.5 to 25 V
V
i
= 11 to 17 V
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
I
o
= 250 to 750mA
I
d
Quiescent Current
T
j
= 25
o
C
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
I
d
Quiescent Current Change
V
i
= 11.5 to 25 V
V
o
T
eN
OutputNoise Voltage
B = 10Hz to100KHz T
j
= 25
o
C
SVR
Supply Voltage Rejection
V
i
= 11.5 to 21.5 V
V
d
Dropout Voltage
I
o
= 1 A
R
o
OutputResistance
f = 1 KHz
I
sc
Short Circuit Current
V
i
= 35 V
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
Min.
7.7
Typ.
8
Max.
8.3
Unit
V
P
o
≤
15W
7.6
8
8.4
V
T
j
= 25
o
C
T
j
=25
o
C
T
j
=25
o
C
T
j
=25
o
C
80
40
mV
mV
100
40
mV
mV
6
mA
0.5
mA
0.8
mA
mV/
o
C
OutputVoltage Drift
I
o
= 5mA
1
40
μ
V/V
O
dB
f= 120 Hz
62
T
j
=25
o
C
2
2.5
V
16
m
A
T
j
=25
o
C
0.75
1.2
1.3
2.2
3.3
A
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle isused.
L7800
6/25
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