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Regulator behaviour in nRF52840

Hello team,

We have a sensor design based on nRF52840 and currently we have configured it in the normal voltage mode DC/DC REG1 enabled. It is a battery operated design. We are observing that the battery doesn't seem to last long enough as expected.

I would like to know the drive capabilities of LDO vs DC/DC regulator in nRF52840, especially when the battery voltage is depleting.

Regards,

Shwetha

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0 Kenneth over 5 years ago

Hi,

Not sure if I understand the question, both LDO and DC/DC will behave the same. However the current consumption is typically lower with DC/DC, since it is more efficient than LDO. You can do some current consumption estimates here with DC/DC regulator ON/OFF:
https://devzone.nordicsemi.com/nordic/power/w/opp/2/online-power-profiler-for-ble

Kenneth
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0 Kenneth over 5 years ago

Hi,

Not sure if I understand the question, both LDO and DC/DC will behave the same. However the current consumption is typically lower with DC/DC, since it is more efficient than LDO. You can do some current consumption estimates here with DC/DC regulator ON/OFF:
https://devzone.nordicsemi.com/nordic/power/w/opp/2/online-power-profiler-for-ble

Kenneth
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