Hello TI experts,
I have a question about TDA4 eMMC: VIO Supply Sequencing and would like your help.
Background:
- We use TPS65941213 & TPS65941111 as the PMIC ICs based on PDN_0C.
- From TDA4 errta item 2144, VDDS_MMC0(1.8V) should be powered up after VDD_CORE (0.8V).
- We tested the power supply sequence of our customer board which used TPS65941213 & TPS65941111. The result shows VDDS_MMC0(1.8V) is powered up before VDD_CORE (0.8V). The picture is attached.
Question:
- For TPS65941111. VOUT_LDO3/(VDDS_MMC0) is powered up before VDD_CORE(buck1&2&3). It is about 1ms earlier. Is it normal for this IC and this NVM?
- What does TI recommend us to do？Should VDDS_MMC0 be earlier or should VDD_CORE be earlier?
- If eMMC: VIO Supply Sequencing is wrong, what result it will cause?
- Because we design our board based on PDN0C. What should we do? Is TPS65941111 the right IC for us?
Thank you in advance!
