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LP Alpha 3.3V output current

Posted: Tue Jan 26, 2021 1:47 pm
by jarihy
What is the output current specification from the 3.3V pins?
I'm looking to power a device that would consume 300-400 mA.

Re: LP Alpha 3.3V output current

Posted: Wed Apr 28, 2021 12:16 pm
by jarihy
I'm looking for the maximum current for the 3.3V power pins as shown in the image on the Hardware Interface and Playability page and not the GPIO pins.
Pins marked 3.3V are outside the Arduino block so I was hoping they could output more current.
Maybe the 3.3V on the eDP connector can provide more current.

Re: LP Alpha 3.3V output current

Posted: Wed Apr 28, 2021 2:33 pm
by ccs_hello
I don't know the technical answer. Only the circuit designers would know.

On the other hand, I strongly recommend for high current drain usage, an external, separate DC-DC buck converter would be a better solution. Yes, I know that will be ugly. However, recognizing LP Alpha/Delta is an expensive SBC. Taking a safer route would be a conservaive bet.

Alternative way is to use the USB 3.0 port and its minimally 5V 500mA capability to feed a DC-DC (5V -> 3.3V 500mA) buck converter.