Datasheet

L78xx - L78xxC Electrical characteristics
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Table 6. Electrical characteristics of L7808 (refer to the test circuits, T
J
= -55 to 150 °C, V
I
= 14V,
I
O
= 500 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage T
J
= 25°C 7.7 8 8.3 V
V
O
Output voltage
I
O
= 5 mA to 1A, P
O
≤ 15 W
V
I
= 11.5 to 23 V
7.6 8 8.4 V
ΔV
O
(1)
Line regulation
V
I
= 10.5 to 25 V, T
J
= 25°C 80
mV
V
I
= 11 to 17 V, T
J
= 25°C 40
ΔV
O
(1)
Load regulation
I
O
= 5 mA to 1.5 A, T
J
= 25°C 100
mV
I
O
= 250 to 750 mA, T
J
= 25°C 40
I
d
Quiescent current T
J
= 25°C 6 mA
ΔI
d
Quiescent current change
I
O
= 5 mA to 1 A 0.5
mA
V
I
= 11.5 to 25 V 0.8
ΔV
O
/ΔT Output voltage drift I
O
= 5 mA 1 mV/°C
eN Output noise voltage B =10 Hz to 100 kHz, T
J
= 25°C 40 µV/V
O
SVR Supply voltage rejection V
I
= 11.5 to 21.5 V, f = 120 Hz 62 dB
V
d
Dropout voltage I
O
= 1 A, T
J
= 25°C 2 2.5 V
R
O
Output resistance f = 1 kHz 16 mΩ
I
sc
Short circuit current V
I
= 35 V, T
J
= 25°C 0.75 1.2 A
I
scp
Short circuit peak current T
J
= 25°C 1.3 2.2 3.3 A
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.