https://community.nxp.com/t5/Power-Management/Issue-with-sw1-regulator/m-p/2150528#M4582 <P>Hi,</P><P>I hope this message finds you well.</P><P>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.</P><P>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.</P><P>Best regards,</P><P>[Shivani]</P> Tue, 12 Aug 2025 04:24:57 GMT Shivani_Elavena 2025-08-12T04:24:57Z https://community.nxp.com/t5/Power-Management/Issue-with-sw1-regulator/m-p/2150528#M4582 <P>Hi,</P><P>I hope this message finds you well.</P><P>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.</P><P>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.</P><P>Best regards,</P><P>[Shivani]</P> Tue, 12 Aug 2025 04:24:57 GMT https://community.nxp.com/t5/Power-Management/Issue-with-sw1-regulator/m-p/2150528#M4582 Shivani_Elavena 2025-08-12T04:24:57Z https://community.nxp.com/t5/Power-Management/Issue-with-sw1-regulator/m-p/2150535#M4583 <P>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.</P> <P><A href="https://www.nxp.com/design/design-center/software/analog-expert-software-and-tools/sdk-analog-expert-drivers/pf502x-socket-programming-board:KITPF502xSKTEVM" target="_blank">PF502x Programming Board | NXP Semiconductors</A></P> <P>For more detail&nbsp; you can read&nbsp; attached file from page21--- 7.2 Operating in TBB mode</P> Tue, 12 Aug 2025 04:42:02 GMT https://community.nxp.com/t5/Power-Management/Issue-with-sw1-regulator/m-p/2150535#M4583 guoweisun 2025-08-12T04:42:02Z