I'm in need for some help to identify 2 components marked with:

  • S3TJ
  • S2TI



There are found in PC Controller from 8bitdo and it contains 3.7v battery and charges using USB.

  • \$\begingroup\$ The manufacturer is MICRONE and the parts are probably LDOs. MICRONE doesn't seem to specify the markings in their datasheet, so you will have to measure it to be sure which one it is. \$\endgroup\$
    – nanash1
    Commented Jul 12, 2023 at 20:26

1 Answer 1


S2TI 5V to 3,3V converter

  • PIN 1 - 5V IN
  • PIN 2 - GND
  • PIN 3 - 5V IN
  • PIN 4 - NC
  • PIN 5 - 3,3V OUT
  • PIN 1 and 3 connected

This pinout was written based on PCB with S2TI

  • \$\begingroup\$ Either pin 1 or pin 3 is probably an enable input. \$\endgroup\$
    – Hearth
    Commented Nov 20, 2023 at 1:13

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