Title :
A 100MHz Eight-Phase Buck Converter Delivering 12A in 25mm2 Using Air-Core Inductors
Author :
Schrom, G. ; Hazucha, P. ; Paillet, F. ; Rennie, D.J. ; Moon, S.T. ; Gardner, D.S. ; Kamik, T. ; Sun, P. ; Nguyen, T.T. ; Hill, M.J. ; Radhakrishnan, K. ; Memioglu, T.
Author_Institution :
Intel Corporation, 2111 NE 25th Avenue, MS JF2-04, Hillsboro, OR 97124, USA
fDate :
Feb. 25 2007-March 1 2007
Abstract :
We present a 100MHz eight-phase synchronous buck converter using air-core inductors. The voltage regulator (VR) chip was manufactured in a 90nm CMOS process and mounted on a flip-chip test package together with surface-mount inductors and decoupling capacitors. The measured peak efficiency is 84.0% for Vin/Vout= 2.4V/1.5V and 79.3% for 2.4V/1.2V. The VR delivers a load current of 12A in an area of only 25mm2 and 2.5mm height. This is the first demonstration of a high-frequency VR with air-core inductors, that reaches a record power density of 3.78kW/in3.
Keywords :
Buck converters; CMOS process; Capacitors; Inductors; Manufacturing processes; Packaging; Regulators; Testing; Virtual reality; Voltage;
Conference_Titel :
Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-4244-0713-3
DOI :
10.1109/APEX.2007.357595
