WiFi AP keep turn OFF, sudden TURN OFF

[tsctrl]

Hi,

I have issue with WiFi connection unstable and keep disconnected for STA modes and sudden WiFi turn off on AP mode.
My investigation for this issue was happens because of unstable vdd voltage/not enough amp from the USB. The voltage drop is on 5v USB rail reduced up to 4.7V for some long duration during operation, measuring vdd on the esp pin is consistent 3.27+- with no significant drop and burnout set on 2.5V was not triggered but i not sure why WiFi and esp effected by this.

For this as the power draw from USB was limited to 2Amp, and i am not able to increase the power input, it there any approach or configuration for me to potentially stabilize the WiFi connection to avoid or reduce the occurrence of this issue?

Thanks!