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LM137HPQML Scheda tecnica(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM137HPQML
Spiegazioni elettronici  3-Terminal Adjustable Negative Regulators
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM137HPQML Scheda tecnica(HTML) 5 Page - National Semiconductor (TI)

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Connection Diagrams (Continued)
TO-220
Plastic Package
3-Lead SOT-223
00906707
Front View
Order Number LM337T
See NS Package Number T03B
00906734
Front View
Order Number LM337IMP
Package Marked N02A See NS Package Number MP04A
Application Hints
When a value for
θ
(H−A) is found using the equation shown,
a heatsink must be selected that has a value that is less than
or equal to this number.
HEATSINKING SOT-223 PACKAGE PARTS
The SOT-223 (“MP”) packages use a copper plane on the
PCB and the PCB itself as a heatsink. To optimize the heat
sinking ability of the plane and PCB, solder the tab of the
package to the plane.
Figures 3, 4 show the information for the SOT-223 package.
Figure 4 assumes a
θ
(J−A) of 75˚C/W for 1 ounce copper and
51˚C/W for 2 ounce copper and a maximum junction tem-
perature of 125˚C.
Please see AN1028 for power enhancement techniques to
be used with the SOT-223 package.
00906732
FIGURE 3.
θ
(J−A) vs Copper (2 ounce) Area for the
SOT-223 Package
00906733
FIGURE 4. Maximum Power Dissipation vs. T
AMB for
the SOT-223 Package
www.national.com
5


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