RE: Quesion about Maximum Voltage & Current of internal DC/DC conv. &LDO of nRF52832.

Stian Røed Hafskjold — Mon, 30 May 2016 11:30:59 GMT

Not sure if I understand you, but you want to use the internal regulators in the nRF52 to power external components? You can not do this.

infocenter.nordicsemi.com/.../power.html

The regulators on the nRF52 consists of both DCDC and LDO which operates in both normal mode and refresh mode. This is automatically controlled by internal circuitry in the chip and is based on the load current from the chip itself. You cannot control this manually. From the spec:

Auto-controlled refresh modes for LDO and DC/DC regulators to maximize efficiency

Automatic switching between LDO and DC/DC regulator based on load to maximize efficiency

So the maximum current you can get from the internal regulator is based on internal load. So if you connected external components to the output of the regulator it would mess things up. You will not get a stable source.

You can maybe get some current from the GPIOs, but not nearly as much as 200mA, infocenter.nordicsemi.com/.../gpio.html

You can use the GPIOs to control an external regulator for the external components.