LM317AMDT National Semiconductor, LM317AMDT Datasheet - Page 11

• Manufacturer Part Number: LM317AMDT
• Description: IC, ADJ LINEAR REG, 1.2V TO 37V, TO252-3
• Manufacturer: National Semiconductor

Specifications of LM317AMDT

• Primary Input Voltage: 40V
• Dropout Voltage Vdo: 2V
• No. Of Outputs: 1
• No. Of Pins: 3
• Output Current: 500mA
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application Hints
Note: * Tab of device attached to topside of copper.
Layout
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
(Continued)
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
11
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
00906361
)
Thermal Resistance
(θ
JA
˚C/W) TO-252
103
87
60
54
52
47
84
70
63
57
57
89
72
61
55
53
www.national.com