L78xx, L78xxC, L78xxAB, L78xxAC
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 20. Electrical characteristics of L7818C
Symbol
Parameter
Output voltage
Test conditions
Min.
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)
ΔVO
Line regulation
mV
VI = 24 to 30 V, TJ = 25°C
I
O = 5 mA to 1.5 A, TJ = 25°C
(1)
ΔVO
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
ΔId
Quiescent current change
VI = 21 to 33 V
ΔVO/ΔT 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
mΩ
A
Short circuit current
VI = 35 V, TJ = 25°C
0.20
2.1
Iscp
Short circuit peak current TJ = 25°C
A
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 ]
