https://devzone.nordicsemi.com/f/nordic-q-a/30320/nrf52-current-consumption-in-relation-to-supply-voltageHello, in the Online Power Profiler , the current consumption increases, when the voltage is reduced. What is the reason for this? Isn&#39;t there any documentation on the power consumption in relation to the supply voltage, with LDO or DCDC?en-USTelligent Community 13Wed, 07 Feb 2018 17:33:24 GMThttps://devzone.nordicsemi.com/thread/120158?ContentTypeID=1Wed, 07 Feb 2018 17:33:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d5eb5f43-390f-4a96-9082-7fa7c2f5c8e5AmbystomaLabs<p>It just basic ohm&#39;s law. When you utilize a dc/dc converter it is simply converting power at one voltage to power at another voltage.</p> <p>Since power = volts x amps then when you reduce the input voltage the current must increase for the power output to be the same.</p> <p>Or you can show the relation as (Vout/Vin) x I out = I in.&nbsp;&nbsp; So the ratio of output voltage to input voltage times the output current is the input current.</p> <p>There are some minor changes to this due to the dc/dc regulator efficiency. But this is best to get the concept across.</p> <p>With an LDO it is a different story since amps out is equal to amps in. No matter what the input voltage is the input current is always the output current.&nbsp; This is why an LDO is very inefficient since the difference in power between input and output is given off as heat in the LDO.</p><div style="clear:both;"></div>