MC7806 Motorola, MC7806 Datasheet - Page 15

• Manufacturer Part Number: MC7806
• Description: THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS
• Manufacturer: Motorola

change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques such
that the average chip temperature is not significantly affected.
change in load current at constant chip temperature.
device dissipation for which the regulator will operate within
specifications.
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Line Regulation – The change in output voltage for a
Load Regulation – The change in output voltage for a
Maximum Power Dissipation – The maximum total
8.0
4.0
20
16
12
0
–50
Figure 11. Worst Case Power Dissipation versus
–25
Ambient Temperature (Case 221A)
T A , AMBIENT TEMPERATURE ( C)
0
No Heatsink
HS = 0 C/W
HS = 15 C/W
25
50
HS = 5 C/W
MC7800, MC7800A, LM340, LM340A Series
Figure 13. D 2 PAK Thermal Resistance and Maximum
80
70
60
50
40
30
75
0
Power Dissipation versus P.C.B. Copper Length
T J(max) = 150 C
JC = 5 C/W
JA = 65 C/W
100
Mounted
Vertically
Free Air
5.0
125
L, LENGTH OF COPPER (mm)
10
DEFINITIONS
150
Minimum
Size Pad
R JA
P D(max) for T A = 50 C
15
not delivered to the load.
with constant load and no input ripple, measured over a
specified frequency range.
accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.
Quiescent Current – That part of the input current that is
Output Noise Voltage – The rms ac voltage at the output,
Long Term Stability – Output voltage stability under
2.5
2.0
1.5
1.0
0.5
20
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
0
Figure 12. Input Output Differential as a Function
–75
Î Î Î Î
Î Î Î Î
Î Î Î Î
Î Î Î Î
I O = 500 mA
I O = 200 mA
L
I O = 20 mA
2.0 oz. Copper
I O = 1.0 A
I O = 0 mA
of Junction Temperature (MC78XXC, AC)
–50
25
L
–25
T J , JUNCTION TEMPERATURE ( C)
30
– – – Extended Curve for MC78XXB
V O = 2% of V O
3.5
3.0
2.5
2.0
1.5
1.0
0
25
50
75
100
15
125