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LM317S/NOPB Datasheet(PDF) 31 Page - Texas Instruments

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Part # LM317S/NOPB
Description  LM117, LM317-N Wide Temperature Three-Pin Adjustable Regulator
PDF  51 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM317S/NOPB Datasheet(HTML) 31 Page - Texas Instruments

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LM117, LM317-N
www.ti.com
SNVS774Q – MAY 2004 – REVISED JUNE 2020
Product Folder Links: LM117 LM317-N
Submit Documentation Feedback
Copyright © 2004–2020, Texas Instruments Incorporated
Layout Guidelines (continued)
(1)
Tab of device attached to topside of copper.
Table 1. RθJA Different Heatsink Area
LAYOUT
COPPER AREA
THERMAL RESISTANCE
Top Side (in2)(1)
Bottom Side (in2)
(RθJA°C/W) TO-252
1
0.0123
0
103
2
0.066
0
87
3
0.3
0
60
4
0.53
0
54
5
0.76
0
52
6
1.0
0
47
7
0.066
0.2
84
8
0.066
0.4
70
9
0.066
0.6
63
10
0.066
0.8
57
11
0.066
1.0
57
12
0.066
0.066
89
13
0.175
0.175
72
14
0.284
0.284
61
15
0.392
0.392
55
16
0.5
0.5
53
Figure 41. RθJA vs 2-oz. Copper Area for TO-252
Figure 42. Maximum Allowable Power Dissipation vs
Ambient Temperature for TO-252



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