Hi, a bit of a noob question.
Does anyone know why the voltage regulator bypass caps (C5 and C6) are 10x the recommended values in the Torex datasheet [1]? They are 10 uF rather than the recommended 1 uF.
What is the power consumption of the CPU, which is really “How much of the regulator’s 200 mA is left for the peripherals that I attach?”
Thanks, Brian.
The reason for using 10uF next to the capacitor of the regulator is: 10uF is better than 1uF for the filtering effect of the circuit, and secondly, when the peripheral is momentarily mounted on the high current, the voltage is not easily dropped.
Can you provide more details, not sure what you mean here
Hi,
The regulator can supply 200 mA. This is a fact from it’s data sheet. Some of this 200 mA will be used by the SAMD21 chip, let’s call this Icpu. So the amount of current that the user’s connected peripherals may draw from the 3.3.Volt pin is Iuser = 0.2 - Icpu.
What is Iuser (or Icpu)?
Thanks, Brian.
In addition to the power consumption of the other devices on the board, the Iuser is approximately 170MA