Hello everyone,
I am currently on a project to create a PCB with esp32.
Except that problem, I solder everything well, all the tracks are good, I changed the dc down (tps62162), but nothing helped.
If I supply my PCB with 6v, the PCB works without any problems and the esp32 starts.
If I supply my PCB with a voltage greater than 6v the esp42 does not start and the voltage at the terminal is less than 3v.
I changed the esp several times, I changed the dc-down.
When I connect a development esp32 in bypass it does not work either.
Not having an oscilloscope, I plugged a white led of 3.2v on 2 pins of the PCB to see (Yeah it looks stupid like that), the led flashes as if the TPS62162 restarts infinitely, I therefore think that the output voltage is not stable and the voltmeter does not detect it.
Now that I know the problem, I tried to look for where it could come from .. but I still can't find ..
For the regulator connection see the diagram below.
I use VLCF4020T-2R2N1R7 inductor has L2
Thank you.