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Issue with sw1 regulator

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Issue with sw1 regulator

‎08-11-2025 09:24 PM
1,308 次查看
Shivani_Elavena
Contributor III

Hi,

I hope this message finds you well.

We are currently working with the PF5020 in (TBB) mode SW1 regulator, and we have encountered an issue. While writing to the SW1 RUN VOLT register, the values do not appear to be reflected on the SW1LX pin as expected.

Could you please provide guidance on why this might be happening or suggest any troubleshooting steps we should follow to resolve this issue? And please provide sw1 regulator configuration sequence.

Best regards,

[Shivani]

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‎08-11-2025 09:42 PM
1,302 次查看
guoweisun
NXP TechSupport
NXP TechSupport

If you want to operate TBB mode please use our recommend socket board or EVB and use the special timing to enter into TBB mode then update the registers.

PF502x Programming Board | NXP Semiconductors

For more detail  you can read  attached file from page21--- 7.2 Operating in TBB mode

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