*You* are either completely off or are talking about something totally different; the subject is VR for CPUs.
In a buck converter, the inductor's value is computed from the desired current ripple, which usually is a fraction of the TDC value. Although a 100nH inductor is a little extreme for 300kHz switching when vout is about 1V, its certainly doable; you'll get high inductor ripple, crappy efficiency but also fast transient response and such inductor is cheap.
The 100uH inductor at 300kHz is appropriate for a high-voltage converter, with an output voltage of e.g. 400V and requiring very small ripple.