A Novel Single-Input-Multiple-Output DC/DC Converter for Distributed Power Management in Many-Core Systems

We propose a novel single-input-multiple-output DC-DC converter as a distributed power management solution for large-scale many-core systems. As power consumptions of cores vary significantly based on applications, dynamically voltage frequency scaling (DVFS) is necessary to optimize performance. Co...

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Bibliographic Details
Main Authors: Liu, Xingye, Ampadu, Paul
Format: Conference Proceeding
Language:English
Subjects:
DC-DC Converter
Delays
distributed power management
DVFS
Inductors
load transient response
Power system management
System-on-chip
Transient analysis
Voltage control
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Summary:We propose a novel single-input-multiple-output DC-DC converter as a distributed power management solution for large-scale many-core systems. As power consumptions of cores vary significantly based on applications, dynamically voltage frequency scaling (DVFS) is necessary to optimize performance. Compared to centralized powering solutions that rely on dynamically reconfiguring the power delivery network, the proposed converter provides three local independent output channels that can respond to various workloads during runtime fast and reliably. From 1V input, output voltages range from 0.33V to 0.94V and supports up 60V/μs transitions. Maximum voltage ripple is limited within 50mV and three output voltages remain stable with a worst-case voltage droop of 30mV during load transitions. Cross regulation is minimized and only 28mV shift is observed at low-power Channel-3. Simulated in 32nm SOI CMOS technology with three customized in-package air-core inductors, peak efficiency achieved at Channel-1 is 92% and peak overall efficiency is 87.6% when all channels are delivering full power.
ISSN:1558-3899
DOI:10.1109/MWSCAS.2019.8885221