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Raspberrt Pico Power Saving

Raspberry Pi Pico power saving usage examples:

  • Sleep mode
  • Underclock
  • Hybrid

Lowest achieved consumption without using sleep mode (underclock) is around 5.5 mA. Deep sleep achieves around 2 mA.

Minimal clock achieved for Rasperry Pico was ~15MHz.

Related

Raspberry Pico documentation is amazing. Check chapters Power Control and Clocks of RP2040 datasheet for a better understanding of MCU internals.

For clocks,

For deep sleep,

Sidenote for power optimizer geeks seeking for sub - 5 mA non-sleep current draw

Record low underclocked non-sleep current consumption of 4.5 mA was observed when +5V was connected to VSYS rail instead of VBUS one to evade Shottky diode which adds some power loss by itself. But please pay attention: your mileage may vary because of manufacturing variations. Also you will lose reverse polarity protection in this case.