Hello all, I have a question because this is not clear according to datasheet. I am using STM32H755XIH3 MCU and I wand to know if I want to use VOS0 MODE. can I use the SMPS on and supply only the LDO and work at VOS0 mode? thanks all.

[IGAL TALOR]

at the datasheet:

LDO only - can work with VOS0

SMPS directly cant work with VOS0.

SMPS on and supplies only the LDO - ?

[IGAL TALOR]

the schematic:

[KDJEM.1 · Accepted solution]

Hello @IGAL TALOR​ ,

For STM32H755xxx3 sales types (industrial temperature range) the voltage regulator output can be set only to VOS2 or VOS3 in Run mode.

The different hardware configurations for power supply is mentioned in DS12919 figure 16: Direct SMPS supply and External SMPS supply, LDO supplied by SMPS.

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Kaouthar