LM317AT National Semiconductor, LM317AT Datasheet - Page 12

• Manufacturer Part Number: LM317AT
• Description: IC, ADJ LINEAR REG, 1.2V TO 37V, TO-220
• Manufacturer: National Semiconductor

Specifications of LM317AT

• Primary Input Voltage: 40V
• Output Voltage Adjustable Range: 1.2V To 37V
• Dropout Voltage Vdo: 2V
• No. Of Outputs: 1
• No. Of Pins: 3
• Output Current: 1.5A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Note: * Tab of device attached to topside of copper.
Layout
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Top Side (in
0.0123
0.066
0.066
0.066
0.066
0.066
0.066
0.066
0.175
0.284
0.392
0.53
0.76
0.3
1.0
0.5
FIGURE 9. θ
TABLE 1. θ
2
)*
Copper Area
JA
vs 2oz Copper Area for TO-252
JA
Different Heatsink Area
12
Bottom Side (in
0.066
0.175
0.284
0.392
0.2
0.4
0.6
0.8
1.0
0.5
0
0
0
0
0
0
2
)
906361
Thermal Resistance
(θ
JA
°C/W) TO-252
103
87
60
54
52
47
84
70
63
57
57
89
72
61
55
53