Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
Refer to the test circuits, T
J
= 0 to 125 °C, V
I
= 28 V, I
O
= 500 mA, C
I
= 0.33 µF, C
O
= 0.1 µF
unless otherwise specified.
Table 21.
Symbol
V
O
V
O
V
O
ΔV
O(1)
ΔV
O(1)
I
d
ΔI
d
ΔV
O
/ΔT
eN
SVR
V
d
R
O
I
sc
I
scp
Electrical characteristics of L7820C
Parameter
Output voltage
Output voltage
Output voltage
Line regulation
T
J
= 25°C
I
O
= 5 mA to 1 A, V
I
= 23 to 33 V
I
O
= 1 A, V
I
= 33 to 35 V, T
J
= 25°C
V
I
= 22.5 to 35 V, T
J
= 25°C
V
I
= 26 to 32 V, T
J
= 25°C
Load regulation
Quiescent current
Quiescent current change
Output voltage drift
Output noise voltage
Supply voltage rejection
Dropout voltage
Output resistance
Short circuit current
Short circuit peak current
I
O
= 5 mA to 1.5 A, T
J
= 25°C
I
O
= 250 to 750 mA, T
J
= 25°C
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= 23 to 35 V
I
O
= 5 mA
B = 10 Hz to 100 kHz, T
J
= 25°C
V
I
= 24 to 35 V, f = 120 Hz
I
O
= 1 A, T
J
= 25°C
f = 1 kHz
V
I
= 35 V, T
J
= 25°C
T
J
= 25°C
52
2
24
0.18
2.1
-1
150
Test conditions
Min.
19.2
19
19
Typ.
20
20
20
Max.
20.8
21
21
400
mV
200
400
mV
200
8
0.5
mA
1
mV/°C
µV/V
O
dB
V
mΩ
A
A
mA
Unit
V
V
V
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.
26/56
Doc ID 2143 Rev 22
STMICROELECTRONICS [ STMICROELECTRONICS ]
