nPM2100 current draw in passthru

RE: nPM2100 current draw in passthru

cliffelion — Mon, 25 Aug 2025 23:56:32 GMT

HI Tomi,

Appreciate the response.

Yes, we are using the nPM2100 EK with a nRF54L15 DK communicates with the PMIC over i2c. I believe you are correct that the PPK is the issue and distorting the measurements due to the fast transients which explains the issue we saw.

Thanks

Cliff

RE: nPM2100 current draw in passthru

Tomi Koskela — Mon, 25 Aug 2025 07:10:49 GMT

Hello,

Is this measured with nPM2100 EK or something else? The current peaks seem to be quite high when boost is operating in ULP mode. It can be difficult for PPK2 to sample those short/high current pulses correctly. What is the boost output capacitor (input/output) configuration? To reduce the peak current, you can increase input capacitance and reduce output capacitance.

In PT mode the average input current should drop compared to the ULP mode.

RE: nPM2100 current draw in passthru

cliffelion — Fri, 22 Aug 2025 20:49:51 GMT

Just to Clarify ... Vout - is the programmed output voltage of the PMIC.