Can I under volt my processor without causing damages?

I have a Intel 1280p and the lowest clock speeds is around 400Mhz, times 20, so it tends to draw a lot of power at idle, is there a way to lower it without parking the cores to reduce power? it is fast enough and i’ve monitored power usage and opening and using apps only about 2-4 cores kick up to abour 1100Mhz.