nRF51422 or nRF51822 as a power supplier

[Ricardo]

I'm going to star a new product development using nRF51422 supplied by a 3V battery. Since it is a low cost product the idea is to use the nRF51422 internal DCDC to provide a regulated voltage to a low power amplifier.

In DCDC mode the voltage is available outside the IC on pin DCC (after LC filter) . As soon as the battery level reaches 2.1V i will have to change to internal LDO mode. My question is: In "LDO mode" is the regulated voltage still avaliable on power pins (AVDD) so I can keep powering the amplifier? (Is the internal LDO voltage avaliable for outside use) What about below 1.8V when in bypass mode, is the voltage also avaliable?

Thanks in adavance.

[ovrebekk]

Hi Ricardo

Unfortunately it is not possible to power any external hardware from the nRF51 device. The regulators are only designed to provide power to the nRF51 chip itself, and will fail if you draw power from them externally.

Best regards
Torbjørn