Цифры взяты из пресс-релиза: www.analog.com/en/about-adi/news-media-relations/news-room/2014-press-release/06_12_14_new_generation_of_high_performance.html
ADSP-BF70x Blackfin® processor family, a high-performance DSP series that delivers a class-leading 800 MMACS of processing power at less than 100 mW – double the performance or half the power of competing devices.
Из чего следует:
100[mW]/3.3[V] = 30[mA] или
30[mA]/400[MHz] = 0.075[mA/MHz].
Считая, что КПД DC/DC преобразователя 3.3->1.2 равен 0.8, получаем:
75[uA/MHz]/0.8 = 93.75[uA/MHz].