Datasheet

V
I
= 14 V, I
O
= 1 A, T
J
= 0 to 125 °C (L7808AC), T
J
= -40 to 125 °C (L7808AB), unless otherwise specified.
Table 5. Electrical characteristics of L7808A
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage
T
J
= 25 °C
7.84 8 8.16 V
V
O
Output voltage
I
O
= 5 mA to 1 A, V
I
= 10.6 to 21 V
7.7 8 8.3 V
V
O
Output voltage
I
O
= 1 A, V
I
= 21 to 23 V, T
J
= 25 °C
7.7 8 8.3 V
∆V
O
(1)
Line regulation
V
I
= 10.6 to 25 V, I
O
= 500 mA, T
J
= 25 °C
12 80 mV
V
I
= 11 to 17 V
15 80 mV
V
I
= 11 to 17 V, T
J
= 25 °C
5 40 mV
V
I
= 10.4 to 23 V, T
J
= 25 °C
12 80 mV
∆V
O
(1)
Load regulation
I
O
= 5 mA to 1 A
25 100
mV
I
O
= 5 mA to 1.5 A, T
J
= 25 °C
30 100
I
O
= 250 to 750 mA
10 50
I
q
Quiescent current
T
J
= 25 °C
4.3 6 mA
6 mA
∆I
q
Quiescent current change
V
I
= 11 to 23 V, I
O
= 500 mA
0.8 mA
V
I
= 10.6 to 23 V, T
J
= 25 °C
0.8 mA
I
O
= 5 mA to 1 A
0.5 mA
SVR Supply voltage rejection
V
I
= 11.5 to 21.5 V, f = 120 Hz, I
O
= 500 mA
62 dB
V
d
Dropout voltage
I
O
= 1 A, T
J
= 25 °C
2 V
eN Output noise voltage
T
A
= 25 °C, B =10 Hz to 100 kHz
10
µV/V
O
R
O
Output resistance f = 1 kHz 18 mΩ
I
sc
Short circuit current
V
I
= 35 V, T
A
= 25 °C
0.2 A
I
scp
Short circuit peak current
T
J
= 25 °C
2.2 A
∆V
O
/∆T
Output voltage drift -0.8 mV/°C
1. 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 cycle is used.
Note: Minimum load current for regulation is 5 mA.
L78
Electrical characteristics
DS0422 - Rev 36
page 8/55