A high-frequency, soft-switching DC-DC converter for dynamic voltage scaling in VLSI loads.
Published: 2004
Language: eng
Number of pages: 116
Description: The monolithic implementation of a Zero-Voltage-Switching Quasi-Square Wave (ZVS-QSW) buck converter capable of meeting the future challenges of low-voltage point-of-load converters is presented. The design uses novel high-speed Dead-Time-Locked-Loops with precision dead-time control to achieve ZVS under dynamic loads and a variable output voltage. By eliminating switching losses, high efficiency is achieved at switching frequencies beyond 1MHz. The ZVS-QSW converter is implemented in a 0.18mum CMOS process and has a measured efficiency of 82% at 5MHz with a 1.4V output. In order to meet the demand for scalable performance, the Dynamic Voltage scaling concept is applied to the ZVS-QSW converter using a dual-mode configuration. In DVS, the supply voltage is scaled down to reduce power while satisfying a variable target clock frequency. An experimental DVS system is demonstrated using a state-of-the-art CPLD. The fully digital DVS controller can achieve the maximum Vdd transition in 30mus.
Notes: Adviser:  Wai Tung Ng.

Thesis (M.A.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 43-03, page: 0948.

MICR copy on microfiche (2 microfiches).