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I'd like to identify or find a replacement for a LDO component in the board above:

LDO in question with a ruler next to it

  • It's a 3.3V LDO.
  • It reads "AMS1117 3.3 DN18".
  • The body is around 4mm width.
  • Similar to SOT-223 package, but it's smaller.

I was looking for AMS1117 but according to datasheet it is available only in SOT-223, TO-252 and SO-8 factors.

He're another photo, with a SOT-223 AMS1117 that I had at hand. I was considering bending LDO but then I saw that top "tab" pin won't fit, so it doesn't look like a viable option.

Top view

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The body is around 4mm width.

It could be a SOT-89 package like this version of the AMS1117: -

enter image description here

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A SOT89-3 package looks like a smaller version of a SOT-223.

The body will be around 4.5 mm in width, and the lead spacing is 1.5 mm or 3 mm between the centerlines of the outer leads.

Armed with an idea of the package, go to your favorite supplier and put that and your other needs into their selector.

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Some second-source vendors make the AMS1117 in other packages, such as the 4.5mm SOT-89.

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