MC7809ACTG datasheet(22/34 Pages) ONSEMI

Part #	MC7809ACTG

Description	1.0 A Positive Voltage Regulators

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MC7800, MC7800A, MC7800AE, NCV7800

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22

Figure 13. Worst Case Power Dissipation versus

Ambient Temperature (Case 221A)

Figure 14. Input Output Differential as a Function

of Junction Temperature (MC78XXC, AC, B)

20

16

12

8.0

4.0

0

-50

-25

025

5075

100

125

150

TA, AMBIENT TEMPERATURE (°C)

qHS = 0°C/W

0.5

0

-75

-50

-25

0

25

50

75

100

125

TJ, JUNCTION TEMPERATURE (°C)

IO = 0 mA

IO = 20 mA

IO = 1.0 A

IO = 500 mA

IO = 200 mA

DVO = 2% of VO

- - - Extended Curve for MC78XXB

qJC = 5°C/W

qJA = 65°C/W

TJ(max) = 150°C

qHS = 5°C/W

qHS = 15°C/W

No Heatsink

2.0

1.5

1.0

2.5

Figure 15. D2PAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

30

40

50

60

70

80

1.0

1.5

2.0

2.5

3.0

3.5

010

20

30

25

15

5.0

L, LENGTH OF COPPER (mm)

PD(max) for TA = 50°C

Minimum

Size Pad

2.0 oz. Copper

L

Free Air

Mounted

Vertically

RqJA

40

50

60

70

80

90

100

0

0.4

0.8

1.2

1.6

2.0

2.4

010

20

30

25

15

5.0

L, LENGTH OF COPPER (mm)

PD(max) for TA = 50°C

Minimum

Size Pad

L

Free Air

Mounted

Vertically

RqJA

2.0 oz. Copper

Figure 16. DPAK Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

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MC7809ACTG Datasheet(PDF) 22 Page - ON Semiconductor

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