What's the maximum source/sink current of 52832 VDD pins?

RE: What's the maximum source/sink current of 52832 VDD pins?

awneil — Tue, 30 Oct 2018 11:42:26 GMT

Really should be properly documented - see: https://devzone.nordicsemi.com/f/nordic-q-a/39956/how-much-current-can-a-nrf52840-pin-sink-before-it-is-damaged/155082#155082

RE: What's the maximum source/sink current of 52832 VDD pins?

Kenneth — Fri, 12 Oct 2018 07:53:01 GMT

You can safely assume 50mA in total through VDD, including mcu and radio. I can check internally if higher is possible.

Best regards,

Kenneth

RE: What's the maximum source/sink current of 52832 VDD pins?

awneil — Fri, 12 Oct 2018 07:43:58 GMT

I'd have thought it should be safe to assume that the power pins should be able to support the max current from at least one GPIO - and would hope that it would be more.

Your username suggests that you are with Avnet? If so, do you not have direct access to Nordic support to ask them?

RE: What's the maximum source/sink current of 52832 VDD pins?

WrightLin.Avnet — Fri, 12 Oct 2018 01:59:56 GMT

Hi Turbo J & awneil:

Again, thanks for your helping.

I'd like to know if I could say that the maximum current could go through VDD pins is nearly around 20mA~35mA?

RE: What's the maximum source/sink current of 52832 VDD pins?

awneil — Tue, 09 Oct 2018 07:48:38 GMT

Turbo J - that's not the question the OP was asking!

That table just gives the spec of an individual GPIO pin - OP is asking if there's also a separate specification for the supply pins.

In other words, can all the GPIO pins be used at maximum current simultaneously - or will that overload the supply connections?

This is sometimes specified by other chip makers; eg:

RE: What's the maximum source/sink current of 52832 VDD pins?

WrightLin.Avnet — Tue, 09 Oct 2018 02:31:27 GMT

Thanks for your great reply!

But I have another question, could the figure you mentioned represent the current curve of VDD pins of 52832 (pin 13/48/36)?

RE: What's the maximum source/sink current of 52832 VDD pins?

Turbo J — Mon, 08 Oct 2018 12:18:05 GMT

See PS 1.4 page 156, figure 24: The current typically levels off around 25mA.

You will have some variance due to production tolerances, so I'd expect the actual short circuit current in the 20-35mA range for a high drive gpio.