Datasheet

Electrical characteristics L78xx, L78xxC, L78xxAB, L78xxAC
14/57 DocID2143 Rev 31
V
I
= 19 V, I
O
= 1 A, T
J
= 0 to 125 °C (L7812AC), T
J
= -40 to 125 °C (L7812AB), unless
otherwise specified.
Table 9. Electrical characteristics of L7812A
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage T
J
= 25°C 11.75 12 12.25 V
V
O
Output voltage I
O
= 5 mA to 1 A, V
I
= 14.8 to 25 V 11.5 12 12.5 V
V
O
Output voltage I
O
= 1 A, V
I
= 25 to 27 V, T
J
= 25°C 11.5 12 12.5 V
V
O
(1)
Line regulation
V
I
= 14.8 to 30 V, I
O
= 500 mA,
T
J
= 25°C
13 120 mV
V
I
= 16 to 12 V 16 120 mV
V
I
= 16 to 12 V, T
J
= 25°C 6 60 mV
V
I
= 14.5 to 27 V, T
J
= 25°C 13 120 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 4.4 6 mA
6mA
I
q
Quiescent current change
V
I
= 15 to 30 V, I
O
= 500 mA 0.8 mA
V
I
= 14.8 to 27 V, T
J
= 25°C 0.8 mA
I
O
= 5 mA to 1 A 0.5 mA
SVR Supply voltage rejection V
I
= 15 to 25 V, f = 120 Hz, I
O
= 500 mA 60 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 -1 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.