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R
Ronil
Associate III
May 6, 2025
Solved

LDO Power Supply for STM32H757ZIYx

  • May 6, 2025
  • 1 reply
  • 269 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

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

mƎALLEm
mƎALLEmBest answer
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

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