Step-Down dc-dc Converter Eliminates Ferrite Cores at 50kHz Enabling Power Supply on Chip with One-Cycle Transient (.PDF Download)

Virtually all present-day DC-DC converters store DC energy in magnetic devices with ferrite cores, such as inductors with DC bias. A new topology for non-isolated step-down dc-dc converters discards ferrite cores completely. The new Resonance Scaling Method results in use of 10nH resonant inductors even at 50kHz switching frequency and an effective factor of 1,000 times reduction of the magnetic size and weight of comparable buck converter at 50kHz.This opens a new power electronics era with the first true Power-Supply-on-a-Chip.

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