STM32H747BGT6 SMPS and USB supply pins

[el659]

Hi, Im planning on using STM32H747BGT6 in LDO mode only and no USB interfaces will be used. What should I do with SMPS pins (VSSSMPS, VLXSMPS, VDDSMPS, VFBSMPS) and USB supply pins (VDD50_USB and VDD33_USB)? The datasheet nor the application note don't say much about what to do with these pins when not used.

Thanks in advance.

[TDK · Accepted solution]

VDDSMPS, VFBSMPS, VSSSMPS to VSS, leave VLXSMPS floating.

STM32H745/755 and STM32H747/757 advanced Arm<Sup>®</Sup>-based 32-bit MCUs - Reference manual

Hook up VDD33_USB and VDD50_USB to VDD.

FAQ: Configuring the VDD50USB and VDD33USB pins on... - STMicroelectronics Community