Datasheet

Electrical characteristics L78xx, L78xxC, L78xxAB, L78xxAC
12/57 DocID2143 Rev 31
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 7. 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
mVI
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
6mA
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 m
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.