Electrical Characteristics (LM7824) (Continued)
Refer to the test circuits. -40°C < T < 125°C, I = 500mA, V = 33V, C = 0.33µF, C = 0.1µF, unless otherwise specified.
J
O
I
I
O
Symbol
Parameter
Conditions
Min.
23.0
22.8
Typ.
24.0
24.0
Max.
25.0
Unit
V
Output Voltage
T = +25°C
V
O
J
5mA ≤ I ≤ 1A, P ≤ 15W,
25.25
O
O
V = 27V to 38V
I
(17)
(17)
Regline Line Regulation
T = +25°C V = 27V to 38V
–
–
17.0
6.0
480
240
480
240
8.0
0.5
1.0
–
mV
mV
J
I
V = 30V to 36V
I
Regload Load Regulation
T = +25°C
I
I
= 5mA to 1.5A
–
15.0
5.0
J
O
O
= 250mA to 750mA
–
I
Quiescent Current
T = +25°C
–
5.2
mA
mA
Q
J
∆I
Quiescent Current Change I = 5mA to 1A
–
0.1
Q
O
V = 27V to 38V
–
0.5
I
(18)
∆V /∆T Output Voltage Drift
I
= 5mA
–
-1.5
60.0
67.0
2.0
mV/°C
O
O
V
Output Noise Voltage
f = 10Hz to 100kHz, T = +25°C
–
–
µV/V
N
A
O
(18)
RR
Ripple Rejection
Dropout Voltage
f = 120Hz, V = 28V to 38V
50.0
–
–
dB
V
I
V
I
= 1A, T = +25°C
–
DROP
O
J
(18)
rO
Output Resistance
f = 1kHz
V = 35V, T = +25°C
–
28.0
230
2.2
–
mΩ
mA
A
I
Short Circuit Current
–
–
SC
I
A
(18)
I
Peak Current
T = +25°C
–
–
PK
J
Notes:
17. 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.
18. These parameters, although guaranteed, are not 100% tested in production.
11
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LM78XX/LM78XXA Rev. 1.2
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
