Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
V = 19 V, I = 1 A, T = 0 to 125 °C (L7812AC), T = -40 to 125 °C (L7812AB), unless
I
O
J
J
otherwise specified.
Table 9. Electrical characteristics of L7812A
Test conditions Min.
Symbol
Parameter
Output voltage
Typ.
Max.
Unit
VO
VO
VO
TJ = 25°C
11.75
11.5
11.5
12
12
12
12.25
12.5
12.5
V
V
V
Output voltage
Output voltage
IO = 5 mA to 1 A, VI = 14.8 to 25 V
IO = 1 A, VI = 25 to 27 V, TJ = 25°C
VI = 14.8 to 30 V, IO = 500 mA,
TJ = 25°C
13
120
mV
(1)
VI = 16 to 12 V
16
6
120
60
mV
mV
mV
VO
Line regulation
VI = 16 to 12 V, TJ = 25°C
VI = 14.5 to 27 V, TJ = 25°C
IO = 5 mA to 1 A
13
25
30
10
4.4
120
100
100
50
(1)
VO
Load regulation
I
O = 5 mA to 1.5 A, TJ = 25°C
mV
IO = 250 to 750 mA
TJ = 25°C
6
mA
mA
mA
mA
mA
dB
Iq
Quiescent current
6
VI = 15 to 30 V, IO = 500 mA
0.8
0.8
0.5
Iq
Quiescent current change VI = 14.8 to 27 V, TJ = 25°C
O = 5 mA to 1 A
I
SVR
Vd
Supply voltage rejection
Dropout voltage
VI = 15 to 25 V, f = 120 Hz, IO = 500 mA
IO = 1 A, TJ = 25°C
60
2
V
eN
RO
Isc
Output noise voltage
Output resistance
TA = 25°C, B = 10 Hz to 100 kHz
f = 1 kHz
10
18
0.2
2.2
-1
µV/VO
m
A
Short circuit current
Short circuit peak current
VI = 35 V, TA = 25°C
TJ = 25°C
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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