topic Re: Discrepancy Between LS1043A Datasheet and Design Guide in Layerscape https://community.nxp.com/t5/Layerscape/Discrepancy-Between-LS1043A-Datasheet-and-Design-Guide/m-p/888670#M4128 <HTML><HEAD></HEAD><BODY><P>For positive transient response, it must be below Vdd + 50 mV (although it may exceed Vdd + 30 mV)<BR />For negative transient response, it must be within Vdd - 30 mV.</P><P>The +50mv -30mv is total deviation due to thermal, di/dt of transients, base regulation and ripple from the regulator.</P><P><BR />Have a great day,<BR />Andrei</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 01 Feb 2019 09:44:54 GMT andrei_skok 2019-02-01T09:44:54Z Discrepancy Between LS1043A Datasheet and Design Guide https://community.nxp.com/t5/Layerscape/Discrepancy-Between-LS1043A-Datasheet-and-Design-Guide/m-p/888669#M4127 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I have a question pertaining to the LS1043A and LS10xxA family. The datasheet of this device lists +/-30mV as the recommended value for the rail on VDD. The design guide for supply filtering, however, lists the requirements as +50mV/-30mV. This is a significant difference at this tight of a spec so I was posting for clarification on which of these is correct, and whether the datasheet is referring solely to DC variation and does not include transients or not.</P><P></P><P>Thanks,</P><P>Abhinav.</P></BODY></HTML> Mon, 21 Jan 2019 23:02:46 GMT https://community.nxp.com/t5/Layerscape/Discrepancy-Between-LS1043A-Datasheet-and-Design-Guide/m-p/888669#M4127 abhinav 2019-01-21T23:02:46Z Re: Discrepancy Between LS1043A Datasheet and Design Guide https://community.nxp.com/t5/Layerscape/Discrepancy-Between-LS1043A-Datasheet-and-Design-Guide/m-p/888670#M4128 <HTML><HEAD></HEAD><BODY><P>For positive transient response, it must be below Vdd + 50 mV (although it may exceed Vdd + 30 mV)<BR />For negative transient response, it must be within Vdd - 30 mV.</P><P>The +50mv -30mv is total deviation due to thermal, di/dt of transients, base regulation and ripple from the regulator.</P><P><BR />Have a great day,<BR />Andrei</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Fri, 01 Feb 2019 09:44:54 GMT https://community.nxp.com/t5/Layerscape/Discrepancy-Between-LS1043A-Datasheet-and-Design-Guide/m-p/888670#M4128 andrei_skok 2019-02-01T09:44:54Z