Running nrf51822 with 1.1v battery?

[toashwin]

Hi I came across this article: www.nordicsemi.com/.../Bluetooth-Smart-hearing-aid-receives-stereo-audio-direct-from-iOS-devices-and-can-recognize-and-optimize-settings-in-frequently-visited-places

They are using nrf51822 WLCSP with a battery size 312. How are they doing it?

Battery size 312 has only 1.1V to 1.4V. And NRF will need atleast 1.8V.

Do you have schematics/app notes using this battery?

Thanks Ashwin

[Jørgen Holmefjord]

Hi,

If you want to use a battery with a voltage outside the specified supply voltage range of 1.8 V to 3.6 V, you will have to add a DC-to-DC converter to your design. A boost (or step-up) converter can be used to increase the supply voltage.

Best regards,

Jørgen