Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
VI = 19 V, IO = 1 A, TJ = 0 to 125 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless
otherwise specified.
Table 9.
Symbol
Electrical characteristics of L7812A
Parameter
Output voltage
Test conditions
Min.
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
ΔVO
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)
ΔVO
Load regulation
I
O = 5 mA to 1.5 A, TJ = 25°C
O = 250 to 750 mA
mV
I
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
ΔIq
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
mΩ
A
Short circuit current
VI = 35 V, TA = 25°C
Iscp
Short circuit peak current TJ = 25°C
A
ΔVO/ΔT Output voltage drift
mV/°C
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be
O
taken into account separately. Pulse testing with low duty cycle is used.
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STMICROELECTRONICS [ ST ]
