L78xx, L78xxC, L78xxAB, L78xxAC
Electrical characteristics
VI = 15 V, IO = 1 A, TJ = 0 to 125 °C (L7809AC), TJ = -40 to 125 °C (L7809AB), unless
otherwise specified.
Table 8.
Symbol
Electrical characteristics of L7809A
Parameter
Output voltage
Test conditions
Min.
Typ.
Max.
Unit
VO
VO
VO
TJ = 25°C
8.82
8.65
8.65
9
9
9
9.18
9.35
9.35
V
V
V
Output voltage
Output voltage
IO = 5 mA to 1 A, VI = 10.6 to 22 V
IO = 1 A, VI = 22 to 24 V, TJ = 25°C
VI = 10.6 to 25 V, IO = 500 mA,
TJ = 25°C
12
90
mV
(1)
VI = 11 to 17 V
15
5
90
45
90
100
100
50
6
mV
mV
mV
ΔVO
Line regulation
VI = 11 to 17 V, TJ = 25°C
VI = 11.4 to 23 V, TJ = 25°C
IO = 5 mA to 1 A
12
25
30
10
4.3
(1)
ΔVO
Load regulation
I
O = 5 mA to 1.5 A, TJ = 25°C
O = 250 to 750 mA
mV
I
TJ = 25°C
mA
mA
mA
mA
mA
Iq
Quiescent current
6
VI = 11 to 25 V, IO = 500 mA
0.8
0.8
0.5
ΔIq
Quiescent current change VI = 10.6 to 23 V, TJ = 25°C
O = 5 mA to 1 A
VI = 11.5 to 21.5 V, f = 120 Hz,
I
SVR
Supply voltage rejection
61
dB
IO = 500 mA
Vd
eN
RO
Isc
Dropout voltage
IO = 1 A, TJ = 25°C
TA = 25°C, B =10 Hz to 100 kHz
f = 1 kHz
2
V
µV/VO
mΩ
A
Output noise voltage
Output resistance
Short circuit current
10
18
VI = 35 V, TA = 25°C
0.2
2.2
-0.8
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.
Doc ID 2143 Rev 30
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STMICROELECTRONICS [ ST ]
