Electrical Characteristics (LM7818) (Continued)
Refer to the test circuits. -40°C < T < 125°C, I = 500mA, V = 27V, C = 0.33µF, C = 0.1µF, unless otherwise specified.
J
O
I
I
O
Symbol
Parameter
Conditions
Min.
17.3
17.1
Typ.
18.0
18.0
Max.
18.7
18.9
Unit
V
Output Voltage
T = +25°C
V
O
J
5mA ≤ I ≤ 1A, P ≤ 15W,
O
O
V = 21V to 33V
I
(15)
(15)
Regline Line Regulation
T = +25°C V = 21V to 33V
–
–
15.0
5.0
15.0
5.0
5.2
–
360
180
360
180
8.0
0.5
1.0
–
mV
mV
J
I
V = 24V to 30V
I
Regload Load Regulation
T = +25°C
I
I
= 5mA to 1.5A
–
J
O
O
= 250mA to 750mA
–
I
Quiescent Current
T = +25°C
–
mA
mA
Q
J
∆I
Quiescent Current Change I = 5mA to 1A
–
Q
O
V = 21V to 33V
–
–
I
(16)
∆V /∆T Output Voltage Drift
I
= 5mA
–
-1.0
110
69.0
2.0
22.0
250
2.2
mV/°C
O
O
V
Output Noise Voltage
f = 10Hz to 100kHz, T = +25°C
–
–
µV/V
N
A
O
(16)
RR
Ripple Rejection
Dropout Voltage
f = 120Hz, V = 22V to 32V
53.0
–
–
dB
V
I
V
I
= 1A, T = +25°C
–
DROP
O
J
(16)
r
Output Resistance
f = 1kHz
V = 35V, T = +25°C
–
–
mΩ
mA
A
O
I
Short Circuit Current
–
–
SC
I
A
(16)
I
Peak Current
T = +25°C
–
–
PK
J
Notes:
15. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must
O
be taken into account separately. Pulse testing with low duty is used.
16. These parameters, although guaranteed, are not 100% tested in production.
10
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LM78XX/LM78XXA Rev. 1.2