I am completely blanking on what this component is called/what it does. Can someone help me out… -_-
Electronic – this component
breadboardcomponentsidentification
Related Solutions
The massive planes and the small tap off of the gate suggest a switching power supply design, so I assumed a power MOSFET. The Q on the silkscreen is another telling sign. This marking chart looks much the same, note the line over the year and week.
In addition this pinout looks about right to the usage. The only confusion is the capacitor between gate and source. A little bit of context might help that. Hope this helps.
Fried bugs in an SOT23-5 package with carmelized epoxy toxic fumes
http://www.ti.com/lit/ds/symlink/tlv62565.pdf
p.s.
There is another SMPS , U20 which is likely for 3.3V USB and other logic chips.
Since this SMPS is located near the speaker port, I am having second thoughts about the function of this regulator. By tracing the output, you may find it is used as a boost regulator like +12V used for Speaker port amplifier (not visible) and the MOTOV1 port. Shorting either of those outputs may have contributed to the problem of fusing the regulator. Although they tend to have UVP, OVP, OTP features that only works if the sense input is not damaged. So handle with care and use a very low current limited lab supply in your experiments and gradually raise the current limit to 50mA with a preset voltage.
Best Answer
This looks like either a ceramic disk capacitor or a thermistor. Those two are easy to distinguish. Test it with a ohmmeter, and a capacitor will read like a open circuit. A thermistor will have some finite resistance. Then warm it up with your hand and see if it changes. Make sure to not be touching the leads when you measure it warm, else your body resistance will distort the reading. If the resistance changed (probably lower) a decent measurable amount from hand warming, you should be able to see it slowly go back to the original value as it cools back to room temperature.
If this is a capacitor, it is probably in the range of a few pF to a few nF. Thermistors can vary from a few Ω to a few 100kΩ in the same package between models.