3v3 Power
BeagleY-AI generates it's 3v3 power from Buck 1 of the TPS65129 PMIC, meaning that it has up to 3.5A of current available.
This rail is shared with other on-board peripherals such as the HDMI framer, USB hub and Ethernet PHY, so expect to have about 500mA usable.
An external supply coupled with a 3v3 regulator is recommended for powering 3.3v projects.