Electrical characteristics
L78xx, L78xxC, L78xxAB, L78xxAC
VI = 33 V, IO = 1 A, TJ = 0 to 125 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless
otherwise specified.
Table 11. Electrical characteristics of L7824A
Symbol
Parameter
Output voltage
Test conditions
Min.
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)
ΔVO
Line regulation
VI = 30 to 36 V, TJ = 25°C
VI = 26.7 to 38 V, TJ = 25°C
IO = 5 mA to 1 A
(1)
ΔVO
Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
mV
I
O = 250 to 750 mA
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
ΔIq
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
mΩ
A
20
Short circuit current
VI = 35 V, TA = 25°C
0.2
2.2
-1.5
Iscp
Short circuit peak current TJ = 25°C
A
ΔVO/ΔT Output voltage drift
mV/°C
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 ]
