I have a circuit powered by a 3.3 V regulator. The regulator is a SMD one, with this marking on its surface T1A30:

I am in need of a comprehensive identification and description of the SMD voltage regulator with the code "T1A30," which is utilized as a power supply element in my circuit. Specifically, I seek information about its manufacturer, specifications, pinout, and any relevant datasheets that provide technical details.

I've a circuit powered by a 3.3 V regulator. The regulator is a SMD one, with this logo and code on its surface:

Drawing of top marking and logo

footprint is SOT23-3 or very similar.

I need to know the information about this voltage regulator. Unfortunately, I do not find any information about this marking code.

Any hint about how to continue?

The pinout is:

enter image description here

  • \$\begingroup\$ I’m not sure which IC this is, but maybe you could try replacing it with a pin-compatible IC with the same functionality and input/output voltage range? Something like the LP3992IMFX-1.5/NOPB assuming those are the output voltages that you need and the output current would be sufficient. \$\endgroup\$
    – jvnlendm
    Commented Oct 5, 2023 at 22:23
  • \$\begingroup\$ Thank you I think you are right, will give it a try. \$\endgroup\$ Commented Oct 5, 2023 at 23:08
  • \$\begingroup\$ Is that possible to provide a better quality image? And can you confirm that the package dimension is SOT-23-5 ? \$\endgroup\$
    – vivier
    Commented Oct 23, 2023 at 21:08

1 Answer 1


That could be a R3134N33EC from RICOH. (now Nisshinbo) Significant code would be T1A. Unfortunately I didn't find any picture.

enter image description here enter image description here


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