Title :
A High Efficiency DC-DC Converter Using 2nH On-Chip Inductors
Author :
Wibben, Josh ; Harjani, Ramesh
Author_Institution :
Minnesota Univ., Minneapolis
Abstract :
Historically buck converters have relied on high-Q inductors on the order of 1 to 100 muH to achieve high efficiency. In this paper we exploit on-chip magnetic coupling in the proposed stacked interleaved topology to enable high efficiency buck converters to be realized with 2 nH moderate-Q on-chip inductors. The measured conversion efficiency for a prototype circuit implemented in a 130-nm CMOS technology was over double that of a linear converter for low output voltages rising to a peak value of 77.9% for a 0.9 V output.
Keywords :
CMOS integrated circuits; DC-DC power convertors; inductors; CMOS technology; DC-DC converter; buck converters; high-Q inductors; linear converter; moderate-Q on-chip inductors; on-chip magnetic coupling; size 130 nm; stacked interleaved topology; voltage 0.9 V; Buck converters; CMOS technology; Circuit topology; Couplings; DC-DC power converters; Inductance; Inductors; Prototypes; Switching converters; Voltage;
Conference_Titel :
VLSI Circuits, 2007 IEEE Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-900784-05-5
Electronic_ISBN :
978-4-900784-05-5
DOI :
10.1109/VLSIC.2007.4342750
