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AO.2
Visitor II
June 21, 2022
Question

What is the STM32WL55 LDO mode output capacitor value on the VFBSMPS pin?

  • June 21, 2022
  • 1 reply
  • 1079 views

The datasheet indicates the value of 470nF for the SMPS mode on the VFBSMPS pin. But for the LDO mode, I didn't find the required value.

Thanks

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1 reply

Louis AUDOLY
ST Employee
June 28, 2022

Hello @AO.2​  and welcome to the community,

For LDO mode, you just have to remove the SMPS coil and keep the 470nF capacitance as you can see in the figure 3 of the datasheet .

Best regards