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Recently I was working on a 5V switching power supply project and I found the best PCB for building it. But in the middle I got confused when I saw an IC with the letters ID2J.

It has 5 pins like an op-amp or an optoisolator SMD. I searched for it and found nothing, no manufacturer and no datasheet. On the PCB silkscreen it's called IC1.

Does any one know what kind of IC is this?

enter image description here

enter image description here enter image description here

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  • \$\begingroup\$ That is a SOT23-5 package. \$\endgroup\$
    – KyranF
    Oct 27, 2014 at 8:45
  • \$\begingroup\$ IC1 means it probably one of the first stages of the schematic. Often they are power input/filtering/management schematics, so this is possibly a low power linear regulator or a reset supervisor, or similar IC. \$\endgroup\$
    – KyranF
    Oct 27, 2014 at 8:45
  • \$\begingroup\$ Also what's with the crap photo quality? It would really help for a wider shot to see the context of the IC, and it's surrounding components. Also, how is this a 5V switching supply project, how did you just "find the best PCB"? \$\endgroup\$
    – KyranF
    Oct 27, 2014 at 8:59
  • \$\begingroup\$ I zoomed in for the IC letters. so that makes it crap. I will be really happy if you give me a helpful answer... \$\endgroup\$
    – kia_rst
    Oct 27, 2014 at 9:03
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    \$\begingroup\$ Could be a voltage regulator like smdcode.com/en/smd/code/… in general omitting the first or last digits when googling helps sometimes. \$\endgroup\$
    – PlasmaHH
    Nov 11, 2014 at 11:41

1 Answer 1

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Searches on ID2J seem to draw a complete blank.

However a search on 1D2J brings up this page... http://m.cnledw.com/bbs/topic/view/163682.html

which contains the entry

表面代码丝印 1DYJ 1DZJ 1D0J 1D1J 1D2J 1D3J 1D4J 1D5J 1D6J 1D7J 1D8J 1D9J 封装SOT23-6封装SOT23-5封装SOT23是什么型号?

unfortunately I can't get you any closer than that ... maybe someone else can? May be misleading because the mark does look like "I" rather than "1"

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  • \$\begingroup\$ yes, I agree it does look more like an I than a 1. \$\endgroup\$
    – KyranF
    Oct 27, 2014 at 10:07
  • \$\begingroup\$ yes that's an "I". \$\endgroup\$
    – kia_rst
    Oct 27, 2014 at 10:25

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