https://devzone.nordicsemi.com/f/nordic-q-a/8323/qfab-schematic-with-dc-dc-how-to-connect-vcc-properlyHello everyone i am using QFAB/DCconcverter reference layout to design my prototype, using the 3V coin cell battery as a power source .my question is in the reference layout they have mentioned VDD/AVDD pins are directly connected to VCC does it meansen-USTelligent Community 13Thu, 23 Jul 2015 08:41:31 GMThttps://devzone.nordicsemi.com/thread/30092?ContentTypeID=1Thu, 23 Jul 2015 08:41:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:810c9edf-0e7c-42ae-93e1-809a41c9e3d4&#216;yvind Karlsen<p>Hi,</p> <p>Connect your positive battery pole to VCC and the negative to VSS(GND). There is an internal connection between VDD and the DC/DC, the DC/DC should power AVDD through an external LC-filter, as shown in the reference schematic.</p> <p>Best regards,</p> <p>Øyvind</p><div style="clear:both;"></div>