i.MX6ULL Decoupling capacitor

ban45 — Wed, 14 Oct 2020 11:34:10 GMT

Is the value of the capacitor fixed so that even if the voltage of VDD High In and VDD SOC IN starts to drop at the same time, VDD SOC IN drops first?
If it has not been decided, is it okay to change from the recommended constant?

We are currently designing using the recommended values in the data sheet.

Best regard

Re: i.MX6ULL Decoupling capacitor

igorpadykov — Thu, 15 Oct 2020 00:40:43 GMT

Hi ban45

>Is the value of the capacitor fixed so that even if the voltage of VDD High In

>and VDD SOC IN starts to drop at the same time, VDD SOC IN drops first?

yes

> is it okay to change from the recommended constant?

capacitor values at VDD SOC IN, VDD High In are not recommended to change.

Please use values provided in Table 9. Power supply decoupling recommendations

Hardware Development Guide for the i.MX 6ULL Applications Processor

Changing capacitor values may affect suspend/resume operation due to

excessive power-up/down ramp time.

Best regards
igor

topic i.MX6ULL Decoupling capacitor in i.MX Processors

i.MX6ULL Decoupling capacitor

Re: i.MX6ULL Decoupling capacitor