STM32N6 max power consumption versus GPIOs usage

[GBA]

New question from this thread.

Hi @mƎALLEm 

I am using STM32N6 Nucleo-144 board. In this board VDDIO is the power supplied at VDD, VBAT. VDDIO2, VDDIO4, and VDDIO5. So this the the power supply which is driving GPIOs. This power is generated by LD39020ADTPU33R which is a LDO Voltage Regulators which can supply maximum 200 mA current.

I am worried about if i can only use 10 GPIOs? What if i need to more GPIOs in my design?

[TDK]

Use as many GPIOs as you want, but don't expect them all to source 20 mA at the same time. This is not typical in design. What are you doing with the GPIOs?

[Andrew Neil]

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@GBA wrote:

Voltage Regulators which can supply maximum 200 mA current.

I am worried about if i can only use 10 GPIOs? What if i need to more GPIOs in my design?

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You can use as many GPIOs as you like - but the total current must not exceed 200mA.

If you need to drive more current than that, you will need to supply separate power and drivers.

PS:

Don't forget that the regulator's 200mA includes other stuff as well as the GPIOs - so it won't all be available for the GPIOs.

And Remember that the regulator will also have a power dissipation limit - which might be exceeded before the current limit ...