topic KW36A BUCK AUTOSTART in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/KW36A-BUCK-AUTOSTART/m-p/996733#M55818 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I want to use KW36A chip in buck auto start mode. I have the VDCDCIN and DCDC-CFG and PSWITCH wired together.</P><P></P><P>Is it all thats required to power up the MCU?</P><P></P><P>I have not connected the 1P8OUT back to the VDD0 and VDD1 pins. Is there any issues with not doing that?</P><P></P><P>What are the implications if VDD0 and 1 are in the NC state?</P><P></P><P>I have connected VDDA, VREFH to 1P8OUT. Will that suffice?</P><P></P><P>Regards,</P><P>Kiran</P></BODY></HTML> Sat, 11 Jan 2020 07:43:15 GMT kiransajeev 2020-01-11T07:43:15Z KW36A BUCK AUTOSTART https://community.nxp.com/t5/Kinetis-Microcontrollers/KW36A-BUCK-AUTOSTART/m-p/996733#M55818 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I want to use KW36A chip in buck auto start mode. I have the VDCDCIN and DCDC-CFG and PSWITCH wired together.</P><P></P><P>Is it all thats required to power up the MCU?</P><P></P><P>I have not connected the 1P8OUT back to the VDD0 and VDD1 pins. Is there any issues with not doing that?</P><P></P><P>What are the implications if VDD0 and 1 are in the NC state?</P><P></P><P>I have connected VDDA, VREFH to 1P8OUT. Will that suffice?</P><P></P><P>Regards,</P><P>Kiran</P></BODY></HTML> Sat, 11 Jan 2020 07:43:15 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/KW36A-BUCK-AUTOSTART/m-p/996733#M55818 kiransajeev 2020-01-11T07:43:15Z Re: KW36A BUCK AUTOSTART https://community.nxp.com/t5/Kinetis-Microcontrollers/KW36A-BUCK-AUTOSTART/m-p/996734#M55819 <HTML><HEAD></HEAD><BODY><P>Hello, </P><P></P><P></P><P>Yes, you need the VDD_0 and the VDD_1 connection. For further details, you can seen in our <A href="https://www.nxp.com/docs/en/user-guide/MiniBoMKW36UG.pdf" title="https://www.nxp.com/docs/en/user-guide/MiniBoMKW36UG.pdf">FRDM-KW36 Minimum BoM Development BoardUser’s Guide</A> , in chapter 3 the connections needed for the requested configuration.</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_6.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/95995iB13F822BC130AA57/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_6.png" alt="pastedImage_6.png" /></span>&nbsp;</P><P>Regards, <BR />Estephania</P></BODY></HTML> Thu, 16 Jan 2020 16:52:34 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/KW36A-BUCK-AUTOSTART/m-p/996734#M55819 stephanie_m 2020-01-16T16:52:34Z