Is POWER really the biggest issue here?

[SomeKyleGuy]

I'm using ESP-WROOM-32 and I've found the absolute hardest part of operating this thing is powering it. If you don't have EXACTLY 3.3v constant, it'll crap out on you. Any advice? Suggested setups? Be gentle on terminology, not a pro.

Also, powering it for the programming is one thing.... I need this to be portable in the end... So, can anyone simply break down the best (and easiest) way to power an ESP32 from a 3.6v 3500mAh Li-ion? Just a simple diagram would be enough.

Thank you.

[ESP_Sprite]

That doesn't match my experience; I'm powering them from 3.0V all the time and they boot like a charm. Are you sure your power supply can deliver the 300-500mA that is needed for phy calibration? If not, you probably see the ESP32 brown out there.

[frax84]

Van you provide a bit more of detail on how are you actually powering esp32? Are you using a voltage regulator? Is it an LDO (low drop out)? Is maximum output current of the regulator compatibile with initial calibration?

[ESP_Sprite]

At work we use standard LM11117-3.3 LDOs with an USB power supply; never had any problem with these. I think I tried designing my schematic with an ADP170-3.0 which can in theory output 300mA, but I noticed that without enough capacitance on the output, it can sometimes flake out. As a hack, I've put two of them in parallel and now my ESP32 is rock-solid.