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

[enojeon]

Hi, all!

I have a Quesion about Maximum Voltage & Current of internal DC/DC conv. & LDO of nRF52832.

I'll design circuit using olny internal DC/DC conv. & LDO of nRF52832 for source power of the peripheral devices.(that peripheral devices consumed about 3.3Volt @ 200mA.)

Because, I want to control main power on/off using internal DC/DC conv. & LDO of nRF52832.

So, I need to specfications about Maximum Voltage & Current of internal DC/DC conv. & LDO of nRF52832.

Please, Inform me that questions,ASAP.

Best Regards, Inho Jeon.

[Stian Røed Hafskjold]

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.