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LDO current consumption, low voltage mode.

cocoa

Hi Nordic guys,

How much is the current consumption of the LDO only (quiescent current), without DC / DC converter, in uA? How much is dropout voltage and PSRR (ripple rejection) ?

When powering nRF51822 in low power mode, LDO has a quiescent current or is true disconnected?

What are the advantages and disadvantages when powering nRF51822 in low voltage mode ?

How much is leakage current of a gpio pin when enabled as output and as input ?

Thanks.

-c

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    Hi Cocoa,

    There's some logic inside that "disconnects" the LDO if VDD == DEC2, and this cannot be set in firmware. It has to be connected on the hardware, as per our reference schematic.

    I think you may have misunderstood parts of Ole's answer. All peripheral/power modes, except SystemOff and SystemOn, will have the same current numbers in LDO and low-voltage mode.

    Do you have some troubles with 1.8V low power mode? Or are you asking because you're evaluating both LDO and 1.8V mode?

    Best regards Håkon

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  • 0

    Hi Cocoa,

    There's some logic inside that "disconnects" the LDO if VDD == DEC2, and this cannot be set in firmware. It has to be connected on the hardware, as per our reference schematic.

    I think you may have misunderstood parts of Ole's answer. All peripheral/power modes, except SystemOff and SystemOn, will have the same current numbers in LDO and low-voltage mode.

    Do you have some troubles with 1.8V low power mode? Or are you asking because you're evaluating both LDO and 1.8V mode?

    Best regards Håkon

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