78XX
Electrical Characteristics
7818
I
Electrical characteristics at specified virtual junction temperature, V
= 27V, I
O
= 500mA (unless otherwise noted)
Parameter
Test Conditions*
7818
Units
Min
17.3
17.1
Typ
Max
18.7
18.9
Output voltage**
25C
0C to 125C
18
18
V
I
O
= 5mA to 1A,
= 21V to 33V, P≤
V
I
mV
25C
15
5
360
180
Input regulation
V
V
I
= 21V to 33V
I= 24V to 30V
0C to 125C
25C
53
69
dB
Ripple rejection
V
I
= 22V to 32V,
f= 120Hz
= 5mA to 1.5A
= 250mA to 750mA
mV
12
4
360
180
Output regulation
IO
IO
Output resistance
f= 1KHz
= 5mA
f= 10 Hz to 100 KHz
= 1A
0C to 125C
0C to 125C
25C
0.022
-1.0
110
2.0
Ω
Temperature coefficient of output voltage
Output noise voltage
Dropout voltage
I
O
mV/C
µ
V
IO
25C
V
Bias current
25C
4.5
8
mA
A
0C to 125C
1
Bias current change
V
IO
I
= 21V to 33V
= 5mA to 1A
0.5
Short-circuit output current
Peak output current
25C
25C
200
2.1
*
Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately.
**
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Electrical Characteristics
7820
I
Electrical characteristics at specified virtual junction temperature, V
= 29V, I
O
= 500mA (unless otherwise noted)
Units
Parameter
Test Conditions*
MIK7820
Output voltage**
25C
19.2
20
20.8
V
0C to 125C
19
20
21
I
O
= 5mA to 1A,
= 23V to 35V, P≤
V
I
mV
25C
0C to 125C
25C
18
7
400
200
Input regulation
V
V
I
= 23V to 35V
I= 26V to 32V
51
66
dB
Ripple rejection
V
I= 24V to 34V,
f= 120Hz
mV
15
7
400
200
Output regulation
I
O
= 5mA to 1.5A
I
O
= 250mA to 750mA
Output resistance
f= 1KHz
= 5mA
f= 10 Hz to 100 KHz
= 1A
0C to 125C
0C to 125C
25C
0.027
-1.3
150
2.0
Ω
Temperature coefficient of output voltage
Output noise voltage
Dropout voltage
I
O
mV/C
µ
V
IO
25C
V
Bias current
25C
4.5
8
mA
A
0C to 125C
1
Bias current change
V
IO
I
= 23V to 35V
= 5mA to 1A
0.5
Short-circuit output current
Peak output current
25C
25C
180
2.1
BEIJING ESTEK ELECTRONICS CO.,LTD
7
ESTEK [ Estek Electronics Co. Ltd ]
