Capacitor voltage rating is not considered for 12V output

[pmnxis]

TAJB107K006RNJ
C16133
1.7Ω 100kHz 6.3V -55℃~+125℃ 100uF ±10% CASE-B_3528 Tantalum Capacitors ROHS

Your schematic considered to use 12V for output. But output capacitor does not consider to use it. Because It's 6.3V rating.
Also can you check maximum ESR for capcitor?

[M4a1x]

Hi,
thanks for taking interest in my little project, I really appreciate you opening an issue.

You're completely right, the capacitors are not suited for the 12V output option. It was added a bit hastily after the fact and I haven't verified all specs. Obviously that wasn't the greatest idea and you probably shouldn't use the 12V output.

Regarding the ESR: I remember that the ESR was more on the low side, as it needs to be high enough to prevent ringing on the output. There's a section in the datasheet (8.2.3) on using ceramic capacitors with a resistor network for the output filter. That also means using a electrolytic cap instead would be perfectly fine.

I currently don't have much time at hand, but I'll try to redo the calculations for the output capacitors including ESR next week. I don't know how I'll change the current ones though, as the idea was to use only basic parts from JLCPCB and the ones currently used have the highest capacitance of those AFAIK.

I'm open to any suggestions.

Cheers,
Max