topic SGTL5000 - VDDD in Digital Signal Controllers https://community.nxp.com/t5/Digital-Signal-Controllers/SGTL5000-VDDD/m-p/794802#M1302 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>we use the SGTL5000 in an i.MX6 system.</P><P></P><P>Problem:</P><P>The VDDD voltage is higher than expected. The codec ist supplied by a MMPF0100-PMIC, a 1.2V-LDO is used. The Codec is the only load on 1.2V - aside from&nbsp; some capacitors, there are no other parts. In the system, the voltage in the 1.2V-rail rises to 1.6V.</P><P>Suspected reason: The 3.3V-supply starts bevore the VDDD is suppliedm, so the SGTL5000 starts an internal regulator.</P><P></P><P>Does the SGTL5000 have an internal voltage regulator (as indicated in the datasheet)?</P><P>How does the SGTL5000 determine, if an external VDDD is supplied?</P><P>Are there any restricitions, on which sequence the supply voltages has to be applied?</P><P></P><P>I cannot find any information about this in the datasheet. Thanks for any hep in advance!</P></BODY></HTML> Tue, 25 Sep 2018 11:44:21 GMT max123 2018-09-25T11:44:21Z SGTL5000 - VDDD https://community.nxp.com/t5/Digital-Signal-Controllers/SGTL5000-VDDD/m-p/794802#M1302 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>we use the SGTL5000 in an i.MX6 system.</P><P></P><P>Problem:</P><P>The VDDD voltage is higher than expected. The codec ist supplied by a MMPF0100-PMIC, a 1.2V-LDO is used. The Codec is the only load on 1.2V - aside from&nbsp; some capacitors, there are no other parts. In the system, the voltage in the 1.2V-rail rises to 1.6V.</P><P>Suspected reason: The 3.3V-supply starts bevore the VDDD is suppliedm, so the SGTL5000 starts an internal regulator.</P><P></P><P>Does the SGTL5000 have an internal voltage regulator (as indicated in the datasheet)?</P><P>How does the SGTL5000 determine, if an external VDDD is supplied?</P><P>Are there any restricitions, on which sequence the supply voltages has to be applied?</P><P></P><P>I cannot find any information about this in the datasheet. Thanks for any hep in advance!</P></BODY></HTML> Tue, 25 Sep 2018 11:44:21 GMT https://community.nxp.com/t5/Digital-Signal-Controllers/SGTL5000-VDDD/m-p/794802#M1302 max123 2018-09-25T11:44:21Z