LM78XX/LM78XXA 3-Terminal 1A Positive Voltage Regulator
Electrical Characteristics (LM7808)
(Continued)
Refer to the test circuits. -40°C
<
T
J
<
125°C, I
O
= 500mA, V
I
= 14V, C
I
= 0.33µF, C
O
= 0.1µF, unless otherwise specified.
Symbol
V
O
Parameter
Output Voltage
T
J
= +25°C
Conditions
5mA
≤
I
O
≤
1A, P
O
≤
15W,
V
I
= 10.5V to 23V
Min.
7.7
7.6
–
–
–
–
–
–
–
–
–
56.0
–
–
–
–
Typ.
8.0
8.0
5.0
2.0
10.0
5.0
5.0
0.05
0.5
-0.8
52.0
73.0
2.0
17.0
230
2.2
Max.
8.3
8.4
160
80.0
160
80.0
8.0
0.5
1.0
–
–
–
–
–
–
–
Unit
V
Regline
Line Regulation
(5)
T
J
= +25°C
T
J
= +25°C
T
J
= +25°C
V
I
= 10.5V to 25V
V
I
= 11.5V to 17V
I
O
= 5mA to 1.5A
I
O
= 250mA to 750mA
mV
Regload Load Regulation
(5)
mV
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
DROP
r
O
I
SC
I
PK
Quiescent Current
Quiescent Current Change
Output Voltage Drift
(6)
Output Noise Voltage
Ripple Rejection
(6)
Dropout Voltage
Output Resistance
(6)
Short Circuit Current
Peak Current
(6)
mA
mA
I
O
= 5mA to 1A
V
I
= 10.5V to 25V
I
O
= 5mA
f = 10Hz to 100kHz, T
A
= +25°C
f = 120Hz, V
O
= 11.5V to 21.5V
I
O
= 1A, T
J
= +25°C
f = 1kHz
V
I
= 35V, T
A
= +25°C
T
J
= +25°C
mV/°C
µV/V
O
dB
V
mΩ
mA
A
Notes:
5. 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.
6. These parameters, although guaranteed, are not 100% tested in production.
5
LM78XX/LM78XXA Rev. 1.0.1
www.fairchildsemi.com
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
