STM32H747XIH / STM32H743XIH Power design

[fastfret]

Hi there,

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My major devices are STM32H747XIH and STM32H743XIH.

I prepare to design a board.

This board can be replaced with these two devices each other. (Two devices share this board)

As I knew about hardware, these two devices are diffenet only in SMPS pins.

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These are my design. Could you help to review my design, is it correct?

I will supply power to VDDLDO 3.3V and VCAP connect 2.2uF capacitors.

SMPS pins let them float. Only use LDO supply power to Vcore.​

If any comments and suggestions, please let me know.

[FBL]

Hello @fastfret​,

I suggest checking RM0399 section 7.4 Power supplies, Fig22 System supply configurations, VLXSMPS should be floating.

[CYANG.1]

Hi

VSSSMPS pin needs to be tied to ground.

[Javier1]

oh boy, contradicting ST info