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SAMD51 Voltage Regulator Default #128

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jacky4566 opened this issue Jun 11, 2019 · 4 comments

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commented Jun 11, 2019

In pursuit of maximum power savings I noticed that Adafruit is not using the onboard SAMD51 Buck regulator despite the inclusion of an inductor onboard. Is there any reason for this?
On my own custom board I brought the idle from 10.4mA to 6.1mA just with one line.
SUPC->VREG.bit.SEL = 1;

The core code seems to use the LDO regulator by default:

SUPC->VREG.bit.SEL = 0;

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commented Jun 11, 2019

you can totally use it if you like, but it makes the ADC noisy so we haven't used it much.

@ladyada ladyada closed this Jun 11, 2019

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commented Jun 11, 2019

Whoah! @ladyada had her coffee this morning! Makes sense about the ADC.
Thanks that'll probably do it then!

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commented Jun 11, 2019

🍵 😂

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