Wiring of VLXSMPS and VDDSMPS pins on STM32U575xx when SMPS is not used?

[Sud_09]

I am referring to the note AN5373 and MB1550/1549 schematics to design a STM32U575xx based board. The note AN5373 shows no connection for the VLXSMPS and VDDSMPS  pins when SMPS is not used. Do i just leave them floating? How should I connect them if I do not want to use the SMPS? Also there is no 'VCAP' pin on my symbol.
Please Assist.

[TDK]

Connect them to GND, per the Reference Manual.

 

What is the full part number of the chip you are using?

 

Also see:

Getting started with STM32U5 MCU hardware development - Application note

 

[Sud_09]

I am using STM32G474VIT6Q.

[TDK]

> I am using STM32G474VIT6Q.

That is not a valid part number.

[TDK]

My first reply should be what you need then. VDD11 are effectively your VCAP pins here. A 2.2 uF cap bypassed to ground on each pin will work.

 

[Sud_09]

Thank you for the information.