| Abstract |
This paper presents a new converter
architecture as a candidate for future microprocessors.
Because the segmentation, phase shifting and merging
principles are implemented, the converter architecture
allows a multi-interleaving operation and provides
automatic current sharing. The multiphase buck converters
with multi-interleaving technique perform better than
interleaving technique because the multi-interleaving
technique can improve current ripple cancellation effect,
can extend duty cycle, can improve transient response
without increasing current ripple in each cell, and can raise
the switching frequency with low switching, gate drive and
body diode losses. Moreover, the concept of bypass LC filter
between input and output is given to achieve nonpulsating
input current and ‘zero’-ripple output current. As a result,
based on losses analysis and simulation results, high
efficiency, high power density, fast transient response and
low-cost 12 V input VRM with output voltage 0.5 to 1 V and
output current 100 to 300 A to power future generation of
microprocessors can be realized. |
