Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
V = 33 V, I = 1 A, T = 0 to 125 °C (L7824AC), T = -40 to 125 °C (L7824AB), unless
I
O
J
J
otherwise specified.
Table 11. Electrical characteristics of L7824A
Test conditions Min.
Symbol
Parameter
Output voltage
Typ.
Max.
Unit
VO
VO
VO
TJ = 25°C
23.5
23
24
24
24
31
35
14
31
25
30
10
4.6
24.5
25
V
Output voltage
Output voltage
IO = 5 mA to 1 A, VI = 27.3 to 37 V
IO = 1 A, VI = 37 to 38 V, TJ = 25°C
VI = 27 to 38 V, IO = 500 mA, TJ = 25°C
VI = 30 to 36 V
V
23
25
V
240
200
120
240
100
100
50
mV
mV
mV
mV
(1)
VO
Line regulation
VI = 30 to 36 V, TJ = 25°C
VI = 26.7 to 38 V, TJ = 25°C
I
O = 5 mA to 1 A
IO = 5 mA to 1.5 A, TJ = 25°C
O = 250 to 750 mA
(1)
VO
Load regulation
mV
I
TJ = 25°C
6
mA
mA
mA
mA
mA
dB
Iq
Quiescent current
6
VI = 27.3 to 38 V, IO = 500 mA
0.8
0.8
0.5
Iq
Quiescent current change VI = 27.3 to 38 V, TJ = 25°C
IO = 5 mA to 1 A
SVR
Vd
Supply voltage rejection
Dropout voltage
VI = 28 to 38 V, f = 120 Hz, IO = 500 mA
54
2
IO = 1 A, TJ = 25°C
TA = 25°C, B = 10 Hz to 100 kHz
f = 1 kHz
V
eN
RO
Isc
Output noise voltage
Output resistance
10
µV/VO
m
A
20
Short circuit current
Short circuit peak current
VI = 35 V, TA = 25°C
TJ = 25°C
0.2
2.2
-1.5
Iscp
A
VO/T Output voltage drift
mV/°C
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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