HI
My current system consists of an nRF54L15 paired with an external flash and sensor. In low-power mode, the current consumption is approximately 15 µA. After sleeping for 1 second, it wakes up and operates for about 20 ms before re-entering low-power mode.
The system is powered by an nPM2100 boost converter in auto mode, with an output voltage of 3.0V. When the input voltage is 3.3V, the nPM2100 enters pass-through mode, and the measured input current is about 15 µA. However, when the input voltage drops to 1.5V, the nPM2100 presumably switches to LP or ULP mode, and the input current exhibits intermittent pulse currents exceeding several hundred microamps. I think this is due to the PFM mode, but these pulse currents increase the overall average current. Moreover, the lower the input voltage, the higher the current becomes. What can I do to avoid these pulse currents without causing an increase in overall power consumption?
I have tested that when the input voltage is 1.5V, the pulse currents disappear when the load current is approximately 600 µA.
output 3.0V
input 1.5V,the current consumption
input 3.3V
Thanks!
