nrf52832 1.8v, external and internal dc/dc

[silvergaucho]

Hei guys,

for a new custom board based on nrf52832 where i have to minimize power:

• have an external Li-Po battery, with a cutoff @3.0v, so the range will be 4.2v-3.0v
• want to bring Vdd to fixed 1.8v via an external DCDC ( it will supply power to all the Vddio lines around the board, so i needed anyway).
• I read around that using the internal DCDC, with two additionals inductances, could save power even more using a sort of internal switching between internal DCDC and LDO. I have space for those inductances.

So, am i wrong implementing 1.8v extrernally and have a conf with the two external components?

Thanks a lot

[embedded717]

Is there 1.8V available in these boards ? I am using 52840, I see 5V and 3.0V. But I need 1.8V, I am hoping I wont have to use external LDO board for 1.8 V and 3.3V that I need for my sensor.