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STM32H755XIH6 SMPS

IGAL TALOR
Associate II

‎2025-09-11 8:16 AM - last edited on ‎2025-09-11 8:53 AM by

Hello,

I am using on my board STM32H755XIH6 CPU and I connected the SMPS feature.
The board voltage is 3.3V, the SMPS regulate the voltage to 1.8V and supplies the LDO.
I am using VOS1 and right now it's working WELL at room temperature.
I measured the VLXSMPS and I want to be sure if the overshoot and undershoot is ok?
can the component be damaged from this overshoot and undershoot?
can you explain to me why I see this?
SAFE_POWER.JPGSAFE_SMPS.jpgSAFE_VLXSMPS.jpg 

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2 REPLIES 2
AleksBak
Associate III

‎2025-09-11 10:34 AM

In principle, normal operation is shown here (on oscillograms). I use it the same way as you and checked it in schematic, everything seems to work normal (I also recently started working with the built-in SMPS controller). Here it can also be compared with the factory product from STM on similar controllers.

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IGAL TALOR
Associate II

‎2025-09-15 10:45 PM

Any power Engineer of STMICRO?

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