nRF52810: Switching the Converter mode for low current consumption

Question

We plan to use it with the Converter mode enabled for low current consumption. 
 
 However, if PIN is always set to Hi in order to use the Converter mode, about 300μA will always flow due to the internal pull-down resistor. 
 In order to avoid this problem, I plan to add a circuit that turns the converter mode to Hi only when the power is turned on. How long does it take for the converter mode to become effective after the power is turned on and the converter mode is set to Hi? 
 
 Assumed operation interval 　Communication at 2-second intervals.

OKA_T.T · Accepted Answer

Thank you very much for your answer. 
 Regarding your question, it is about DC/DC converters. I have already designed it based on the reference circuit you mentioned. 
 Is it abnormal to have 300&mu;A flowing at all times when driving the DC/DC converter as I asked earlier? 
 ・Method under consideration 
 　(1) Turn off the power supply except when necessary, to avoid the constant 300&mu;A consumption. 　(2) In order to reduce the current consumption at the time of transmission, I want to start the DC/DC converter after the power is turned on and then communicate. 　(3) For the purpose of 2) above, we would like to know how long it takes for the DC/DC converter to operate after setting its PIN to Hi.

Simonr · Answer

Hi 
 Yes, you shouldn't see a constant 300uA current draw. If the device is in refresh mode, you will see some spikes (as explained in this case ), but a constant draw is not normal. Can you explain what pin exactly you set to high? It should be sufficient to enable the DCDC converter with the enabling DCDCEN bit as explained in the product specification . 
 Best regards, 
 Simon

nRF52810: Switching the Converter mode for low current consumption

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