MC78xxCT Series
Vishay Semiconductor
Ratings and
Characteristic Curves
(T
A
= 25°C unless otherwise noted)
Fig. 1 – Power Dissipation vs.
Ambient Temperature (MC78xxCT)
20
θ
JC
= 5°C/W
θ
JA
= 65°C/W
T
J (max)
= 150°C
2.5
Fig. 2 – Dropout Voltage
vs. Junction Temperature
V
IN
-- V
OUT,
Input - Output
Voltage Differential (V)
16
Io = 1.0A
2.0
Io = 500mA
Power Dissipation (W)
θ
HS
= 5°C/W
12
1.5
Io = 200mA
Io = 20mA
1.0
Io = 0mA
8.0
θ
HS
= 15°C/W
No Heatsink
4.0
0
0.5
0
25
50
75
100
125
150
0
25
50
75
100
125
Ambient Temperatue (°C)
Fig. 3 – Peak Output Current
3.00
80
Fig. 4 –Ripple Rejection Ratio
vs. Output Voltage
f = 120Hz
I
o
= 20mA
˘Vin = 1.0V (RMS)
I
o
-- Output Current (A)
2.25
T
J
= --40°C
T
J
= 0°C
RR -- Ripple Rejection (db)
70
1.50
60
Part # / V
in
7805 / 10V
7806 / 11V
7808 / 14V
7812 / 19V
7815 / 23V
7818 / 27V
7824 / 33V
4.0
6.0
8.0
10
12
14
16
18
20
22
24
T
J
= 25°C
T
J
= 125°C
0.75
50
0
40
0
6.0
12
18
24
30
Input -- Output Voltage Differential (V)
V
o
-- Output Voltage (V)
Fig. 5 – Output Impedance (mΩ)
vs. Output Voltage
1000
f = 120Hz
I
o
= 500mA
C
L
= OuF
6.20
Fig. 6 – Output Voltage
vs. Junction Temperature
V
in
= 10V
V
o
= 6.0V
I
o
= 20mA
6.10
100
V
o
-- Output Voltage (V)
4.0
8.0
12
16
20
24
6.00
5.90
10
5.80
--75 --50 --25
0
25
50
100 125 150 175 200
V
o
-- Output Voltage (V)
Document Number 74813
29-Nov-01
T
J
-- Junction Temperature (°C)
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