STM32U3C5 - SMPS: Is an inductor needed for each VDD11?

[AQB]

Hello,
I am working on a design incorporating the STM32U3C5CIU6Q in SMPS mode. This package includes two VDD11 pins. I am having trouble interpreting the datasheet when it comes to the number of inductors I will need. This note under Figure 24 in the datasheet is clear that each pin will need a capacitor to VSSSMPS, but it seems like it could also imply that each VDD11 pin requires its own inductor between VLXSMPS.

The power supply scheme (with SMPS) is also not clear to me:

This section seems more like it is expecting a single inductor:

Am I okay to use a single inductor between the VLXSMPS pin and VD11 node, with each VD11 pin having its own capacitors, or should I treat each VD11 as a separate loop with its own inductor as well?

Thanks for any help!

[mƎALLEm · Accepted solution]

Hello,

I recommend to refer to the AN6011 "Getting started with STM32U3 MCU hardware development" / Section 8 Reference design:

Hope that helps.

PS: I'll escalate internally to remove this confusion from the datasheet. Internal ticket for follow-up: CDM0062340.