Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
V = 14 V, I = 1 A, T = 0 to 125 °C (L7808AC), T = -40 to 125 °C (L7808AB), unless
I
O
J
J
otherwise specified.
Table 7. Electrical characteristics of L7808A
Test conditions Min.
Symbol
Parameter
Output voltage
Typ.
Max.
Unit
VO
VO
VO
TJ = 25°C
7.84
7.7
8
8
8
8.16
8.3
V
V
V
Output voltage
Output voltage
IO = 5 mA to 1 A, VI = 10.6 to 21 V
IO = 1 A, VI = 21 to 23 V, TJ = 25°C
7.7
8.3
VI = 10.6 to 25 V, IO = 500 mA,
TJ = 25°C
12
80
mV
(1)
VI = 11 to 17 V
15
5
80
40
80
100
100
50
6
mV
mV
mV
VO
Line regulation
VI = 11 to 17 V, TJ = 25°C
VI = 10.4 to 23 V, TJ = 25°C
IO = 5 mA to 1 A
12
25
30
10
4.3
(1)
VO
Load regulation
I
O = 5 mA to 1.5 A, TJ = 25°C
mV
IO = 250 to 750 mA
TJ = 25°C
mA
mA
mA
mA
mA
Iq
Quiescent current
6
VI = 11 to 23 V, IO = 500 mA
0.8
0.8
0.5
Iq
Quiescent current change VI = 10.6 to 23 V, TJ = 25°C
O = 5 mA to 1 A
I
VI = 11.5 to 21.5 V, f = 120 Hz,
IO = 500 mA
SVR
Supply voltage rejection
62
dB
Vd
eN
RO
Isc
Dropout voltage
IO = 1 A, TJ = 25°C
TA = 25°C, B =10 Hz to 100 kHz
f = 1 kHz
2
V
µV/VO
m
A
Output noise voltage
Output resistance
10
18
Short circuit current
Short circuit peak current
VI = 35 V, TA = 25°C
TJ = 25°C
0.2
2.2
-0.8
Iscp
A
VO/T Output voltage drift
mV/°C
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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