2020-06-21 12:03 PM
Hello, I was looking for an stm32h7 part where I could provide voltage to the internal ldo from a vddldo pin to achieve lower power consumption using an external smps. I'm looking at the h743 lineup but cannot find any package with such exposed pin even if the documentation mentions it, am I doing something wrong? Would I be better directly supplying the vcore from the vcap pins? (I wanted to avoid if possible and still use the core ldo to avoid the need to boot the mcu from the ldo and then swap vcore supplies)
2020-06-21 01:28 PM
You can open up the datasheet and search for VDDLDO to see which packages have these pins. Unfortunately, it's only the BGA packages.
https://www.st.com/resource/en/datasheet/stm32h743bi.pdf
If you need lower power consumption, there's probably better families. But only you know your project requirements.