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Graduate II
May 6, 2025
Solved

LDO Power Supply for STM32H757ZIYx

  • May 6, 2025
  • 1 reply
  • 268 views

Hello, I have seen in the post That many users had a problem with the LDO power supply for STM32H757ZI

I wanted to ask, can you confirm that I have a correct implementation of the power supply for LDO? 

STM_32_power_Supply.jpg

    This topic has been closed for replies.
    Best answer by mƎALLEm

    Hello,

    1- VLXSMPS must be kept floating. It's already indicated in the post you have referred to.

    2- Regarding VCAP3 (from AN4938) :

    mALLEm_0-1746551462344.png

    VCAP3 must be connected to other VCAP pins with only 2x2.2uF:

    mALLEm_1-1746551793819.png

    1 reply

    mƎALLEmAnswer
    Technical Moderator
    May 6, 2025

    Hello,

    1- VLXSMPS must be kept floating. It's already indicated in the post you have referred to.

    2- Regarding VCAP3 (from AN4938) :

    mALLEm_0-1746551462344.png

    VCAP3 must be connected to other VCAP pins with only 2x2.2uF:

    mALLEm_1-1746551793819.png