TY - GEN
T1 - Open and closed loop inductors for high-efficiency system-on-package integrated voltage regulators
AU - Alvarez, Claudio
AU - Bellaredj, Mohamed
AU - Swaminathan, Madhavan
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported by ASCENT, one of six centers in JUMP, a Semiconductor Research Corporation (SRC) program sponsored by DARPA.
Publisher Copyright:
© 2019 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - Integrated Voltage Regulators (IVR) with integrated magnetics have been shown to provide better efficiency and performance as compared to conventional on-board solutions by reducing power delivery networks (PDN) parasitic, and DC and switching losses. However, IVR integration remains a challenging problem, with a major bottleneck being the integration of power inductors especially for high-efficiency and high-conversion ratio converters in applications such as personal computers and servers, where conversion ratios of 12:1V or 48:1V (with currents of 10A - 200A) are typical. In this paper, package-embedded open and closed loop inductors are designed for a 48:1V 2.5A single-phase converter (basic building block for multi-phase converters to support higher current levels) based on an analysis of the overall system efficiency, considering the simulated characteristics of the inductor dc resistance, ac resistance and inductance, and saturation current. We show that toroidal inductors out-perform the solenoidal structures when they are embedded and surrounded by conducting planes, where the former has a higher inductance (32nH vs 16nH) and higher Q-factor (30 vs 21) at 10MHz, and similar DC resistance and saturation current between 5A - 8A.
AB - Integrated Voltage Regulators (IVR) with integrated magnetics have been shown to provide better efficiency and performance as compared to conventional on-board solutions by reducing power delivery networks (PDN) parasitic, and DC and switching losses. However, IVR integration remains a challenging problem, with a major bottleneck being the integration of power inductors especially for high-efficiency and high-conversion ratio converters in applications such as personal computers and servers, where conversion ratios of 12:1V or 48:1V (with currents of 10A - 200A) are typical. In this paper, package-embedded open and closed loop inductors are designed for a 48:1V 2.5A single-phase converter (basic building block for multi-phase converters to support higher current levels) based on an analysis of the overall system efficiency, considering the simulated characteristics of the inductor dc resistance, ac resistance and inductance, and saturation current. We show that toroidal inductors out-perform the solenoidal structures when they are embedded and surrounded by conducting planes, where the former has a higher inductance (32nH vs 16nH) and higher Q-factor (30 vs 21) at 10MHz, and similar DC resistance and saturation current between 5A - 8A.
UR - http://www.scopus.com/inward/record.url?scp=85072276860&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072276860&partnerID=8YFLogxK
U2 - 10.1109/ECTC.2019.00257
DO - 10.1109/ECTC.2019.00257
M3 - Conference contribution
AN - SCOPUS:85072276860
T3 - Proceedings - Electronic Components and Technology Conference
SP - 1672
EP - 1679
BT - Proceedings - IEEE 69th Electronic Components and Technology Conference, ECTC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 69th IEEE Electronic Components and Technology Conference, ECTC 2019
Y2 - 28 May 2019 through 31 May 2019
ER -