https://community.nxp.com/t5/Power-Management/FS26-LPOFF-MODE/m-p/2134922#M4512 <P>Hi,<BR />We are using FS26 with S32k358.<BR />In a recent batch, we are facing an issue that is causing an unwanted LPOFF state. After powering up the board we are not getting outputs at the regulators (<STRONG>VREF=5V,VLDO1=5V,VLDO2=5V,VCORE=1.5V</STRONG>). We programmed <STRONG>VBST for 8V</STRONG>,<STRONG>VPRE for 6V</STRONG> and <STRONG>VPRE_LP_OTP for 5.35V.<BR /><BR /></STRONG>We are getting <STRONG>5.35V at VPRE</STRONG>.<BR />The RSTB is <STRONG>lOW</STRONG> and pulled up to <STRONG>VDDIO is 5V (VLDO1, currently not available).<BR /><BR /></STRONG>In another post (<A href="https://community.nxp.com/t5/S32K/How-to-wake-wake-up-MFS2633-from-LPOFF-Mode/m-p/1758802" target="_blank" rel="noopener">link</A>) in the community, we came to know that without any wake up event selected,&nbsp;the FS26 will be&nbsp;stuck until a power-on reset event.&nbsp;<BR /><BR /><STRONG><SPAN>Now, what is the best way to come out of this state? what is the way to do a manual POR?<BR /><BR /><a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/12216">@TomasVaverka</a>&nbsp;<BR /></SPAN><BR /><BR /><BR /></STRONG></P> Wed, 16 Jul 2025 10:19:28 GMT abunayeeem 2025-07-16T10:19:28Z https://community.nxp.com/t5/Power-Management/FS26-LPOFF-MODE/m-p/2134922#M4512 <P>Hi,<BR />We are using FS26 with S32k358.<BR />In a recent batch, we are facing an issue that is causing an unwanted LPOFF state. After powering up the board we are not getting outputs at the regulators (<STRONG>VREF=5V,VLDO1=5V,VLDO2=5V,VCORE=1.5V</STRONG>). We programmed <STRONG>VBST for 8V</STRONG>,<STRONG>VPRE for 6V</STRONG> and <STRONG>VPRE_LP_OTP for 5.35V.<BR /><BR /></STRONG>We are getting <STRONG>5.35V at VPRE</STRONG>.<BR />The RSTB is <STRONG>lOW</STRONG> and pulled up to <STRONG>VDDIO is 5V (VLDO1, currently not available).<BR /><BR /></STRONG>In another post (<A href="https://community.nxp.com/t5/S32K/How-to-wake-wake-up-MFS2633-from-LPOFF-Mode/m-p/1758802" target="_blank" rel="noopener">link</A>) in the community, we came to know that without any wake up event selected,&nbsp;the FS26 will be&nbsp;stuck until a power-on reset event.&nbsp;<BR /><BR /><STRONG><SPAN>Now, what is the best way to come out of this state? what is the way to do a manual POR?<BR /><BR /><a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/12216">@TomasVaverka</a>&nbsp;<BR /></SPAN><BR /><BR /><BR /></STRONG></P> Wed, 16 Jul 2025 10:19:28 GMT https://community.nxp.com/t5/Power-Management/FS26-LPOFF-MODE/m-p/2134922#M4512 abunayeeem 2025-07-16T10:19:28Z https://community.nxp.com/t5/Power-Management/FS26-LPOFF-MODE/m-p/2135268#M4514 <P>Had replied to you based on your case.</P> Wed, 16 Jul 2025 22:50:05 GMT https://community.nxp.com/t5/Power-Management/FS26-LPOFF-MODE/m-p/2135268#M4514 guoweisun 2025-07-16T22:50:05Z