MC33269, NCV33269
170
150
130
110
90
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
100
90
80
70
60
50
40
P
for T = 50°C
D(max)
A
Free Air
Mounted
Vertically
P
for T = 50°C
A
D(max)
2.0 oz. Copper
L
2.4
2.0
1.6
1.2
0.8
0.4
Minimum
Size Pad
Graph represents symmetrical layout
L
2.0 oz.
L
Copper
70
L
3.0 mm
50
R
q
JA
R
q
JA
30
0
5.0
10
15
20
25
30
0
10
20
30
40
50
L, LENGTH OF COPPER (mm)
L, LENGTH OF COPPER (mm)
Figure 9. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 8. SOP−8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
280
2.50
P
for T = 50°C
D(max)
A
Free Air
Mounted
Vertically
240
200
160
120
80
1.25
2.0 oz. Copper
0.83
L
Minimum
Size Pad
0.63
L
0.50
0.42
0.35
R
q
JA
40
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
Figure 10. SOT−223 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
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