https://devzone.nordicsemi.com/f/nordic-q-a/17840/dc-dc-internal-converterHi Nordic, We are trying to supply the chip nRF51422 with a Li-Ion battery. The nominal voltage is 3.7V, but as it is known, when full, this voltage can reach up to 4.2V. My question is, can the DC/DC be supplied with this kind of cells? Because Ien-USTelligent Community 13Sat, 19 Nov 2016 12:13:06 GMThttps://devzone.nordicsemi.com/thread/68745?ContentTypeID=1Sat, 19 Nov 2016 12:13:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2841b242-3868-4b5a-9bd3-6c15c7db9633angel<p>Thanks man, will find a different solution then!</p> <p>Best wishes!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/68744?ContentTypeID=1Fri, 18 Nov 2016 17:37:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5b9d5983-e764-4b9c-bfe5-38e2020b8552Wojtek<p>According to <a href="http://infocenter.nordicsemi.com/pdf/nRF51422_PS_v3.2.pdf">nRF51422 Product Specification v3.2</a> 3.9V is the absolute maximum, it is not recommended to work on such a high voltage.</p> <p>Look at the Table 20 in chapter 7 of the specification - it is stated that for both, internal LDO and DC/DC converter, maximum supply voltage is 3.6V.</p> <p>If You want to use such a cell, you NEED to use some external LDO or DC/DC converter to lower the voltage that is supplied to the chip.</p><div style="clear:both;"></div>