Connection and external components for SMPS
Hi, I have some questions about the connection and its external components for the SMPS step-down converter of the MCU.
The microcontroller I'm using is a STM32H745IIT6. On the datasheet I found this schematic and these indications for the components:
Question 1: The ESR is indicated for capacitors, but I can't find this information in the datasheets of any ceramic capacitors, is it because the ESR of ceramics cap is so low that it is not even indicated? How can I tell if the capacitors I have chosen are good?
I was thinking of using these: 885012208094 for 4.7uF and 885012214001 for 10uF.
Question 2: The DC resistance is indicated for the inductor, but is this a maximum value or must it be that resistance?
Just to understand, between these two inductances: 74479276222C and 74479288222, which one is better?
Question 3: regarding the capacitors on VCAP and VDDLDO, I still follow the pattern I see a few pages before the datasheet? This:
To conclude this is the circuit I was thinking of doing, could it work well?
