Power Supply for STM32F030 Cortex TSSOP20 VDDA and VDD pin

[fredy]

Please i need help.

The datasheet, says the VDDA voltage level must be always greater or equal to the VDD voltage level
and must be provided first.

My qustion is: will my circuit work, if I tie the VDDA and VDD together, to be powered by the same  LDO DC-DC converter?

Thanks in advance.

[Andrew Neil · Accepted solution]

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@fredy wrote:

The datasheet, says the VDDA voltage level must be always greater or equal to the VDD voltage level
and must be provided first..

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Indeed it does:

https://www.st.com/resource/en/datasheet/stm32f030f4.pdf#page=13

However, Application note AN4080, Getting started with STM32F0x1/x2/x8 hardware development, does say that it is OK to connect VDDA and VDD together to a single supply:

@STTwo-32 so it does seem that the datasheet wording is a bit misleading ...

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Discussion of the datasheet wording split to new thread: 

STM32F030 datasheet: Misleading VDDA vs VDD sequencing description?

[TDK]

> will my circuit work, if I tie the VDDA and VDD together, to be powered by the same  LDO DC-DC converter?

Yes, if you tie VDD and VDDA together, then they are equal, and that satisfies the condition. That is the most common configuration.

[fredy]

Thank you all for your swift help.

I'll proceed with the design and share my finding after the circuit is build.

regards,

[mƎALLEm]

Hello @fredy and welcome to the community,

Better to close this thread by accepting the post that answered your question.

If you have further questions about this subject, you can open a new thread and refer to this one.

Thank you

[mƎALLEm]

Hello;

I said you need to accept the post that answered your question, not my post.