iMXRT1052: eMMC Power Supply

[AkshayPatil]

Hi,

We are using 4GB emmc with iMXRT1052. 

We are using step dowm buck converter (3V3) for the controller power supply. In IMXRT1050-EVKB(SCH-30168, PDF: SPF-30168) ref design NXP has used LDO and power switch for SD card supply.   is it necessary to use separate LDO(350mA) for the emmc power supply or we can use 3V3 form buck for emmc?

[kerryzhou]

Hi @AkshayPatil ,

  When you design the RT1052 hardware, you need to match this power frequency:

More details, please refer to the MIMXRT105060HDUG.pdf:

https://www.nxp.com/webapp/Download?colCode=MIMXRT105060HDUG&location=null

The power range should match the datasheet:

About the emmc power, you can check your used emmc, whether your buck converter power match the emmc power. To the VDD_SNVS_IN power, the buck converter should match above pictures.

Wish it helps you!

Best Regards,

Kerry