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I'm reverse engineering / hacking a Chinese board which has the footprint for this regulator which i want to replace. I am not quite sure what the package is though, I'm certain someone here does.

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It's a D-Pak aka TO-252.

The ST datasheet for 78M05 shows this as a standard package for this part.

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  • 2
    \$\begingroup\$ Hard to beat the speed of Photons :D \$\endgroup\$ – Wesley Lee Sep 28 '17 at 17:30
  • \$\begingroup\$ +1 That's not an ST part though, it's a domestic manufacturer. \$\endgroup\$ – Spehro Pefhany Sep 28 '17 at 17:39
  • \$\begingroup\$ yup, it's not ST. \$\endgroup\$ – Orbitronics Sep 28 '17 at 18:02
  • \$\begingroup\$ @SpehroPefhany, obviously it's better to use the datasheet from the specific manufacturer if you know what it is. But if you don't, for jelly bean parts like this, the low cost vendors will be duplicating the designs of bigger companies like ST/TI/On/... and will match the package very closely. \$\endgroup\$ – The Photon Sep 28 '17 at 18:07
  • \$\begingroup\$ @ThePhoton Absolutely, and it's more than justified in this case, but worth keeping in mind especially when the congruence may be sketchy to the point where words like 'counterfeit' come to mind. Like some of the "National" switching regulator chips that come from China. I have bought parts from this particular maker and they're okay in my experience. \$\endgroup\$ – Spehro Pefhany Sep 28 '17 at 19:08
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Looks like D-PAK (TO-252AA)

Dimension E should be 6.5mm, and e ~2.3mm

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