SAMA5D27-SOM1 power supplies

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sirdan
Posts: 26
Joined: Thu Jun 25, 2009 4:19 pm

SAMA5D27-SOM1 power supplies

Sun Feb 25, 2018 3:31 am

Hello,

The SAMA5D27-SOM1-EK1 schematic shows it uses a triple output regulator. Since we are intending to power the VDDSDHC with 3.3v, not 1.8v on our custom SAMA5D27-SOM1 board, we can do away with the 1.8v regulator output. Is it necessary to have VDD_IN and VDDSDHC on separate 3.3v power rails? Are we safe to use a single 3.3v output regulator to power both VDD_IN and VDDSDHC and some other peripherals?

Thanks,
Dan
sirdan
Posts: 26
Joined: Thu Jun 25, 2009 4:19 pm

Re: SAMA5D27-SOM1 power supplies

Mon Feb 26, 2018 9:46 am

Found the answer.

Code: Select all


Power Supply Configuration #1
The SAMA5D27 SOM1 is supplied by only one main supply. In this configuration mode, all supplies are connected together and supplied by the main 3.3V supply. All PIOs have VDDIN_3V3 Power Rail as voltage reference.

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