direct SMPS Hardware design

[khanhcong861989]

Dear all!

this is the first time i design PCB for STM32H755, as my understand for direct SMPS that i design like attach file, really i don't know is it correct, so can you help take look and let me know if any mistake.

[MHoll.2]

Please consult the reference manual (RM0399) chapter 7.4, the Datasheet (DS12919 Rev 2) chapter 6.3.3, and the Application note (AN4938).

1) Inductor in VLXSMPS should be 2.2uH, Isat >= 1.7A, Irms >=1.4A

2) There should be a 220pF Capacitor on Pin VLXSMPS

3) VDDSMPS should have a 4.7uF Capacitor

4) All VDD pins should have a decopling capacitor (normaly 100nF)  and one 4.7uF Capacitor

5) If VBAT is not used it should be connected to VDD

6) 10uH as filter Inductor on VREF, VDDA seems very big