Hello, I am designing my Hadrware base on STM32H743VI. Was looking for Power supply application note I could not find any. I would like to know how I would have to connect my VCAP as the LDO is not used or provided. Shall I put it on 100n??

[SAbis]

What about Vref+??

As I am not using any Battery, I have decided to connect Vbat directly to VDD, is that correct?

OSC32 will not be used in my app, will it be possible for to leave it open?

[Danish1]

Have you checked AN4938 "Getting started with STM32H74xI/G and STM32H75xI/G hardware development"

or the data sheet for your stm32?

I see a couple of figures of "Power Supply Scheme"

They show 2 x 2.2 uF capacitors on VCap - make them ceramic because they need to be low inductance and low ESR to allow the stm32 to take gulps of current.

If you're not using the built-in LDO, how to you plan to power the Core Domain VCore?

Hope this helps,

Danish

[SAbis]

thanks for the quick feedback. I saw the AN4938 later and used it for the power supply. My µC does not have a dedicated pin to supply the embedded LDO.

By reading the datasheet, they also said, the VDDLDO is tied to VDD, when not available on a package (See oint on joint picture)