MC33269D-33G Datasheet, PDF (5/12 Pages) ON Semiconductor – 800 mA, Adjustable Output, Low Dropout Voltage Regulator

MC33269, NCV33269
170
3.2
150
2.8
P_D(max) for T_A = 50C
130
2.4
110
90
70
Graph represents symmetrical layout ^2.0
ÏÏÏ ÏÏÏ _L
2.0 oz.
Copper
ÏÏÏÏÏÏÏÏÏÏÏÏÏ _L
1.6
1.2
3.0 mm
50
0.8
R_qJA
30
0.4
0
10
20
30
40
50
L, LENGTH OF COPPER (mm)
Figure 8. SOP−8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
100
2.4
Free Air
P_D(max) for T_A = 50C
90
Mounted
2.0
Vertically
80
Minimum
70
Size Pad
60
2.0 oz. Copper
L
1.6
ÏÏÏÏÏÏ _1.2
L
ÏÏÏÏÏÏ _0.8
50
0.4
R_qJA
40
0
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
Figure 9. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
280
2.50
Free Air
P_D(max) for T_A = 50C
240
Mounted
1.25
Vertically
200
Minimum
160
Size Pad
120
2.0 oz. Copper
L
0.83
ÏÏÏÏ _L
0.63
ÏÏÏÏÏÏÏÏ_0.50
80
0.42
R_qJA
40
0.35
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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