nRF9160 power requirements

RE: nRF9160 power requirements

MLU — Fri, 31 Oct 2025 11:52:02 GMT

The power supply must therefore be designed for the maximum expected current.

RE: nRF9160 power requirements

Simonr — Fri, 31 Oct 2025 11:45:49 GMT

Hi Michael

If the supply voltage ever drops below the minimum voltage required for safe operations (2.80V) a brown-out reset will occur. It will put the system in a reset state and it will start back up when the voltage is safe again.

The transmitter will not be adjusted with variations in VDD voltage.

Best regards,

Simon

RE: nRF9160 power requirements

MLU — Thu, 30 Oct 2025 09:40:29 GMT

will it reduce transmitter power or will there be a RESET?

RE: nRF9160 power requirements

MLU — Wed, 29 Oct 2025 15:55:12 GMT

Thank you for feedback. What happens if the power supply is to weak and voltage drops?

RE: nRF9160 power requirements

khelmutlord — Wed, 29 Oct 2025 15:33:35 GMT

It is possible to infer the length of these peak currents from the Online Power Profiler: Online Power Profiler for LTE

As is mentioned in the modem current consumption spec, https://docs.nordicsemi.com/bundle/ps_nrf9160/page/_tmp/alta.nRF9160/autodita/APPLICATION.CURRENT/parameters.id_current_modem.html the max peak current is ~450mA in a TX event with very poor VSWR.

Worst case is around ~3 seconds for a TX event.

In reality, I would expect a few 10s of ms per event maximum and ~250mA peak current.