L78xx, L78xxC, L78xxAB, L78xxAC
Electrical characteristics
Refer to the test circuits, T = 0 to 125 °C, V = 26 V, I = 500 mA, C = 0.33 µF, C = 0.1 µF
J
I
O
I
O
unless otherwise specified.
Table 20. Electrical characteristics of L7818C
Test conditions Min.
Symbol
Parameter
Output voltage
Typ.
Max.
Unit
VO
VO
VO
TJ = 25°C
17.3
17.1
17.1
18
18
18
18.7
18.9
18.9
360
180
360
180
8
V
V
V
Output voltage
Output voltage
IO = 5 mA to 1 A, VI = 21 to 31 V
IO = 1 A, VI = 31 to 33 V, TJ = 25°C
VI = 21 to 33 V, TJ = 25°C
(1)
VO
Line regulation
mV
VI = 24 to 30 V, TJ = 25°C
I
O = 5 mA to 1.5 A, TJ = 25°C
(1)
VO
Load regulation
mV
mA
mA
IO = 250 to 750 mA, TJ = 25°C
TJ = 25°C
Id
Quiescent current
I
O = 5 mA to 1 A
0.5
1
Id
Quiescent current change
VI = 21 to 33 V
VO/T Output voltage drift
IO = 5 mA
-1
mV/°C
µV/VO
dB
eN
SVR
Vd
Output noise voltage
Supply voltage rejection
Dropout voltage
B = 10 Hz to 100 kHz, TJ = 25°C
VI = 22 to 32 V, f = 120 Hz
IO = 1 A, TJ = 25°C
f = 1 kHz
110
53
2
V
RO
Isc
Output resistance
22
m
A
Short circuit current
Short circuit peak current
VI = 35 V, TJ = 25°C
TJ = 25°C
0.20
2.1
Iscp
A
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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