Title
An Active Compensator Scheme for Dynamic Voltage Scaling of Voltage Regulators
Abstract
Dynamic voltage scaling (DVS) technique is a common industry practice in optimizing power consumption of microprocessors by dynamically altering the supply voltage under different operational modes, while maintaining the performance requirements. During DVS operation, it is desirable to position the output voltage to a new level commanded by the microprocessor (CPU) with minimum delay. However, voltage deviation and slow settling time usually exist due to large output capacitance and compensation delay in voltage regulators. Although optimal DVS can be achieved by modifying the output capacitance and compensation, this method is limited by constraints from stringent static and dynamic requirements. In this paper, the effects of output capacitance and compensation network on DVS operation are discussed in detail. An active compensator scheme is then proposed to ensure smooth transition of the output voltage without change of power stage and compensation during DVS. Simulation and experimental results are included to demonstrate the effectiveness of the proposed scheme.
Journal Title
Ieee Transactions on Power Electronics
Volume
24
Issue/Number
1-2
Publication Date
1-1-2009
Document Type
Article
First Page
307
Last Page
311
WOS Identifier
ISSN
0885-8993
Recommended Citation
"An Active Compensator Scheme for Dynamic Voltage Scaling of Voltage Regulators" (2009). Faculty Bibliography 2000s. 2333.
https://stars.library.ucf.edu/facultybib2000/2333