https://community.nxp.com/t5/Digital-Signal-Controllers/MC56F83-DSC/m-p/1953873#M3557 <P>Hi,</P> <P>The total capacitor value on all VCAP pins for MC56F83xxx is 4.4uF. You have to connect the capacitors on the Vcap pins with total 4.4uF. If you do not connect the capacitors on the VCAP pins, the internal regulator output voltage is not stable, even can not power power.The capacitor is like a pool, saving charges, which provides power for the components like core, flash RAM...</P> <P>Because this is a regulator mechanism rather than a DC/DC converter mechanism(switch mode power supply), there is not so-called CC(continuous current mode) mode.</P> <P>Hope it can help you</P> <P>BR</P> <P>XiangJun Rong</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="xiangjun_rong_0-1726195628362.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/298957i627BD62891088C1D/image-size/medium?v=v2&amp;px=400" role="button" title="xiangjun_rong_0-1726195628362.png" alt="xiangjun_rong_0-1726195628362.png" /></span></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="xiangjun_rong_1-1726196286813.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/298963iBA86C6F8805A7CFF/image-size/medium?v=v2&amp;px=400" role="button" title="xiangjun_rong_1-1726196286813.png" alt="xiangjun_rong_1-1726196286813.png" /></span></P> <P>&nbsp;</P> Fri, 13 Sep 2024 02:58:14 GMT xiangjun_rong 2024-09-13T02:58:14Z https://community.nxp.com/t5/Digital-Signal-Controllers/MC56F83-DSC/m-p/1953503#M3556 <P>Hi,</P><P>I am using&nbsp;MC56F83789MLL DSC. I want to know what can happen if I don't use Vcap capacitors. Can the Controller supply go to CC mode because of this??</P> Thu, 12 Sep 2024 13:24:19 GMT https://community.nxp.com/t5/Digital-Signal-Controllers/MC56F83-DSC/m-p/1953503#M3556 Rishab 2024-09-12T13:24:19Z https://community.nxp.com/t5/Digital-Signal-Controllers/MC56F83-DSC/m-p/1953873#M3557 <P>Hi,</P> <P>The total capacitor value on all VCAP pins for MC56F83xxx is 4.4uF. You have to connect the capacitors on the Vcap pins with total 4.4uF. If you do not connect the capacitors on the VCAP pins, the internal regulator output voltage is not stable, even can not power power.The capacitor is like a pool, saving charges, which provides power for the components like core, flash RAM...</P> <P>Because this is a regulator mechanism rather than a DC/DC converter mechanism(switch mode power supply), there is not so-called CC(continuous current mode) mode.</P> <P>Hope it can help you</P> <P>BR</P> <P>XiangJun Rong</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="xiangjun_rong_0-1726195628362.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/298957i627BD62891088C1D/image-size/medium?v=v2&amp;px=400" role="button" title="xiangjun_rong_0-1726195628362.png" alt="xiangjun_rong_0-1726195628362.png" /></span></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="xiangjun_rong_1-1726196286813.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/298963iBA86C6F8805A7CFF/image-size/medium?v=v2&amp;px=400" role="button" title="xiangjun_rong_1-1726196286813.png" alt="xiangjun_rong_1-1726196286813.png" /></span></P> <P>&nbsp;</P> Fri, 13 Sep 2024 02:58:14 GMT https://community.nxp.com/t5/Digital-Signal-Controllers/MC56F83-DSC/m-p/1953873#M3557 xiangjun_rong 2024-09-13T02:58:14Z