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Can the built-in regulator in iMX287 support maximum operating frequency?

Question asked by George Fukutomi on Aug 29, 2014
Latest reply on Sep 1, 2014 by George Fukutomi

Dear All,

 

We calculated the power consumption for designing our board.

Because inconsistency arose, I want someone to solve the riddle.

 

a)  Based on the data sheet, the maximum output current of DCDC_VDD is 250mA(MIN).

b)  When a Core clock is 454.73MHz according to i.MX28 Power Consumption Caliculator, the power consumption of Core is 408.43mW and the current is 263.5mA ( = 408.43mW / 1.55V ).

 

When the clock of Core is the maximum, can't needed current be supplied to Core only by a built-in regulator?

Is the supply from the outside needed?

 

Please let me know what kind of way of thinking is correct.

 

Best Regards,

George

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