STM32H725RG VFQFPN68 power scheme. Am I doing it right?

[jmarino]

 

Can somebody tell me whether I am, or not, powering this STM32H725RG in the right way?

As far as I know, after reading several times the specs, the 68 pin package doesn't have LDO (SMPS only).

I've built my first board this way and the MCU got burnt.

 

Thanks.

[STTwo-32]

Hello @jmarino 

I'm not a HW expert. But i can recommand you to take a look at the AN5419. It should be really helpful.

Best Regards.

STTwo-32 

[jmarino]

Thank you, but I already did:

 

https://community.st.com/t5/stm32-mcus-boards-and-hardware/what-s-the-correct-power-supply-scheme-for-h725-735-vfqfpn68/m-p/644714

[MHoll.2]

Ok You say you did check AN5419, so please add the missing capacitors from Table 2. (4x 100nF + 1x 4.7nF on VDD, 1x 220pF on VLXSMPS)

What is connected to VDDA and VBAT?

[jmarino]

All the VSS pins and exposed pad are connected to GND.

The schematic doesn't show all of VSS pins because Kicad symbols hide them and leave only one.

 

Thank you for your time.