LM2940T-12 National Semiconductor, LM2940T-12 Datasheet - Page 15

• Manufacturer Part Number: LM2940T-12
• Description: LM2940T-12
• Manufacturer: National Semiconductor

Application Hints
(Continued)
00882240
FIGURE 5. θ
vs. Copper (2 ounce) Area for the
00882239
(JA)
SOT-223 Package
FIGURE 4. Maximum Power Dissipation vs. T
for
AMB
the TO-263 Package
Figure 5 and Figure 6 show the information for the SOT-223
package. Figure 6 assumes a θ
of 74˚C/W for 1 ounce
(JA)
copper and 51˚C/W for 2 ounce copper and a maximum
junction temperature of 125˚C.
00882241
FIGURE 6. Maximum Power Dissipation vs. T
for the SOT-223 Package
AMB
15
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