Are there any guidelines regarding what is the permissible (or recommended) maximum current draw from the 3.3V power rail (i.e. the 3.3V pins on GPIO) for a HAT used with the Pi 5?
From what I have found, there are various unofficial figures floating around the 'net, but all of them are concerning earlier versions of the Pi, and have either been derived experimentally or through postulation over the specifications of the PMIC used in different models of Pi. Figures I've seen range from 800mA for the 1B+, to 500mA for all models, to 1.5A for 3B/4.
I have in mind an application for a HAT that would draw around 300mA from 3.3V. I'm wondering whether I should use the 3.3V rail directly, or add a regulator/converter to generate my own 3.3V from 5V.
From what I have found, there are various unofficial figures floating around the 'net, but all of them are concerning earlier versions of the Pi, and have either been derived experimentally or through postulation over the specifications of the PMIC used in different models of Pi. Figures I've seen range from 800mA for the 1B+, to 500mA for all models, to 1.5A for 3B/4.
I have in mind an application for a HAT that would draw around 300mA from 3.3V. I'm wondering whether I should use the 3.3V rail directly, or add a regulator/converter to generate my own 3.3V from 5V.
Statistics: Posted by HwAoRrDk — Thu Mar 07, 2024 3:51 pm