Title

An Active Compensator Scheme For Dynamic Voltage Scaling Of Voltage Regulators

Keywords

DC-DC; Dynamic voltage identification (VID); Dynamic voltage scaling; Voltage regulator (VR)

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. © 2009 IEEE.

Publication Date

1-1-2009

Publication Title

IEEE Transactions on Power Electronics

Volume

24

Issue

1

Number of Pages

307-311

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TPEL.2008.2005773

Socpus ID

61649098611 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/61649098611

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