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I am trying to identify this 5 pin SOT-23 regulator. It's labeled S80D (Maybe S8OD, the letter O not number 0). But a search for that top code does not come up with anything specific to it.

enter image description here

I do not recognize the logo used. It looks like a comma, or a lopsided rainbow. I have searched for the manufacturer logo on a few sites but nothing matches. Since it's not even an initial or recognizable shape, I can't even narrow it down.

No, it's not broken.

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  • \$\begingroup\$ It is almost impossible to tell which it really is, the codes are not unique and the part might be counterfeit anyways. Try smdcode.com it tells me that it may be a rico RP103x LDO or anything compatible. The real question is: what are you planning to do with the knowledge, and if there is a better way to deal with this \$\endgroup\$
    – PlasmaHH
    Apr 14, 2016 at 8:14
  • \$\begingroup\$ @PlasmaHH I know that the top-code alone isn't that useful or unique, but combined with the package, it being a regulator, and especially having a manufacturers logo is should eventually be identifiable. The main reason I want this is because I don't recognize the manufacturer, and I would like to know it's specs (max input, if its fixed or adjustable, and if adj, the formula) \$\endgroup\$
    – Passerby
    Apr 14, 2016 at 8:30
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    \$\begingroup\$ I have found two more IC-s with this logo, one, two. But nothing more, it is maybe from a Japanese manufacturer, not certain. \$\endgroup\$
    – Bence Kaulics
    Apr 14, 2016 at 12:25
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    \$\begingroup\$ That logo seems to be used by "Nanjing Micro One Electronics Inc". \$\endgroup\$
    – brhans
    Apr 14, 2016 at 16:16
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    \$\begingroup\$ @brhans if you want to add that as an answer, with a link to their page or normal logo, I'd accept it. Since they don't have downloadable datasheets, I doubt an identification down to the part is feasible. \$\endgroup\$
    – Passerby
    Apr 15, 2016 at 5:19

2 Answers 2

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cannot name the manufacturer, however on my Pro Micros and Minis (all "counterfeit Chinese knockoffs" which I would rephrase as "inexpensive and reliable open source providers from China) the regulators are labeled S2PC, S80C, S80D (micros) and S8PL (mini), all with the same manufacturer symbol. I have tested the dropout voltage and measured 240 mV at 65 mA load.

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It's a counterfeit 3.3v LDO, common on Chinese Arduino Pro Mini knockoffs.

Source: I have one sitting in front of me.

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    \$\begingroup\$ What makes it counterfeit? \$\endgroup\$
    – Passerby
    Mar 16, 2017 at 20:31

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