iFixit - Answers With Device "Nothing Audio"

Nothing Ear (2): Help identifying 5-pin SOT-23 IC ( “AK3T7”) on Nothing Ear 2024 case

Fri, 08 May 2026 01:10:38 -0700

Hi all,

I’m trying to identify a small 5-pin IC on the flex PCB of a Nothing earbud charging case (Nothing Ear).

Details:

Package: SOT-23-5
Top marking: AK3T7 (or very close)
Location: on flex cable going to pogo pins (earbud charging contacts)

Issue:

Right earbud not detected
Voltage drop only on right side when flex is connected:
- Left side: ~4.2V (normal)
- Right side: drops to ~3.8V under load

What I tested:

Disconnect flex → both sides read 4.2V
Connect flex → right side voltage drops
Removed the IC → voltage returns to normal
BUT detection LED no longer lights up without the IC

Observations:

Pin 2 = GND
Pin 4 ≈ 3V (input)
Pin 5 ≈ 3V (output)
Likely has EN/control pins

Also found a damaged resistor connected to VOUT, which may have caused the failure.

Questions:

What IC could this be? (Load switch? Power distribution? Detection IC?)
Any known equivalents or replacements?

Photos attached.

Appreciate any help 🙏

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