Switch off VREFBUF on STM32U5

Is it possible to switch VREFBUF clock off after configuration for power save? So the clock is off and the buffer is providing Vref.

In DS there is no mention about it (e.g OPAMP has this note).

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MGAGE.1Best answer

ST Employee

Hello @Tomas Hamouz,

Yes, it's possible to switch off the clock of VREFBUF for power save.

Once the VREFBUF is configured and stabilized, the clock can be disabled, while the buffer continues to provide the reference voltage.

If you need to reconfigure VREFBUF, you will need to re-enable the clock, make the changes, wait for stabilization, and then disable the clock.

Thank you for your message,

Best regards.