Electrical Characteristics (LM7818)
(Refer to the test circuits. 40 C
T
125 C, I = 500mA, V = 27V, C = 0.33 F, C = 0.1 F, unless otherwise specified)
J
O
I
I
O
Parameter
Symbol
Conditions
Min
Typ
18.0
18.0
15.0
5.0
Max
18.7
18.9
360
180
360
180
8.0
0.5
1.0
–
Unit
Output Voltage
V
T
=
J
25 C
17.3
O
V
5mA
I
1A, P
15W, V = 21V to 33V
17.1
–
O
O
I
Line Regulation
(Note 12)
Regline
T
T
T
=
=
=
25 C
25 C
25 C
V = 21V to 33V
I
J
J
J
mV
V = 24V to 30V
–
I
Load Regulation
(Note 12)
Regload
I
I
= 5mA to 1.5mA
–
15.0
5.0
O
O
mV
mA
= 250mA to 750mA
–
Quiescent Current
Quiescent Current Change
I
–
5.2
Q
I
I
= 5mA to 1A
O
–
–
Q
mA
V = 21V to 33V
–
–
I
Output Voltage Drift (Note 17)
Output Noise Voltage
V
/
T
I
= 5mA
O
–
1.0
mV/ C
O
V
f = 10Hz to 100KHz, T
=
25 C
–
110
69.0
2.0
–
V/V
dB
V
N
A
O
Ripple Rejection (Note 17)
Dropout Voltage
RR
f = 120Hz, V = 22V to 32V
53.0
–
–
I
V
I
= 1A, T =
J
25 C
–
DROP
rO
O
Output Resistance (Note 17)
Short Circuit Current
f = 1KHz
V = 35V, T =
A
–
22.0
250
2.2
–
m
I
25 C
–
–
mA
A
SC
I
Peak Current (Note 17)
I
T
= 25 C
J
–
–
PK
Note 16: Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account separately. Pulse testing with
O
low duty is used.
Note 17: These parameters, although guaranteed, are not 100% tested in production.
Electrical Characteristics (LM7824)
(Refer to the test circuits. 40 C
T
125 C, I = 500mA, V = 33V, C = 0.33 F, C = 0.1 F, unless otherwise specified)
J
O
I
I
O
Parameter
Symbol
Conditions
Min
Typ
24.0
24.0
17.0
6.0
Max
25.0
25.25
480
240
480
240
8.0
0.5
1.0
–
Unit
Output Voltage
V
T
=
J
25 C
23.0
O
V
5mA
I
1A, P
15W, V = 27V to 38V
22.8
–
O
O
I
Line Regulation
(Note 18)
Regline
T
T
T
=
=
=
25 C
25 C
25 C
V = 27V to 38V
I
J
J
J
mV
V = 30V to 36V
–
I
Load Regulation
(Note 18)
Regload
I
I
= 5mA to 1.5mA
–
15.0
5.0
O
O
mV
mA
= 250mA to 750mA
–
Quiescent Current
Quiescent Current Change
I
–
5.2
Q
I
I
= 5mA to 1A
O
–
0.1
Q
mA
V = 27V to 38V
–
0.5
I
Output Voltage Drift (Note 19)
Output Noise Voltage
V
/
T
I
= 5mA
O
–
1.5
mV/ C
O
V
f = 10Hz to 100KHz, T
=
25 C
–
60.0
67.0
2.0
–
V/V
dB
V
N
A
O
Ripple Rejection (Note 19)
Dropout Voltage
RR
f = 120Hz, V = 28V to 38V
50.0
–
–
I
V
I
= 1A, T =
J
25 C
–
DROP
rO
O
Output Resistance (Note 19)
Short Circuit Current
f = 1KHz
V = 35V, T =
A
–
28.0
230
2.2
–
m
I
25 C
–
–
mA
A
SC
I
Peak Current (Note 19)
I
T
= 25 C
J
–
–
PK
Note 18: Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account separately. Pulse testing with
O
low duty is used.
Note 19: These parameters, although guaranteed, are not 100% tested in production.
7
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