I am a beginner about electronic circuits and english

I am designing a circuit to use two three-terminal regulators L78S05CV (5V2A) to cover the power supply of Raspberry Pi Zero 2 W, because 5V 2.5A is recommended.

However, many sources say that the maximum measured current consumption of the RPi Zero2W is about 5V0.6A.
https://picockpit.com/raspberry-pi/...i-zero-2-w/#Raspberry_Pi_Zero_2_W_power_usage

Does the difference between the catalog specs and the actual measured current mean that it is just a safety margin?
I am producing a work for myself, so I am not looking for excessively high reliability

Due to the size of the board, I interpret the maximum current consumption as 5V0.8A and would like to use other components.
Thank you

 

Welcome to AAC.

My understanding of the current rating for the RPi Zero 2 W is that its basis is the maximum safe current draw by the board and its connected peripherals. So, rather than being a requirement for operation, it is a maximum possible rating before damage and so also represents the maximum practical supply requirement.

If you are not bus-powering peripherals then the number isn't the one you want. I would suggest empirical measurement of your own configuration, but do be careful to measure startup currents which can be much higher than steady state running. You might find a voltage supervisor useful to ensure a stable boot.

 

Thanks for the answer.
I had forgotten about USB bus power.
I will design the power supply circuit while actually watching the current consumption during startup!