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LP38843 Datasheet(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de pieza LP38843
Descripción Electrónicos  3A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors
PDF  11 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP38843 Datasheet(HTML) 9 Page - National Semiconductor (TI)

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Application Hints (Continued)
As shown in the graph below, increasing the copper area
beyond 1 square inch produces very little improvement. The
minimum value for
θ
JA for the TO-263 package mounted to a
PCB is 32˚C/W.
Figure 2 shows the maximum allowable power dissipation
for TO-263 packages for different ambient temperatures,
assuming
θ
JA is 35˚C/W and the maximum junction tempera-
ture is 125˚C.
20102925
FIGURE 1.
θ
JA vs Copper (1 Ounce) Area for TO-263
package
20102926
FIGURE 2. Maximum power dissipation vs ambient
temperature for TO-263 package
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