TY - GEN
T1 - AOT-controlled dual-mode AVP buck regulator with AEAF mechanism
AU - Li, Hsin Lun
AU - Pao, Chia Cheng
AU - Chen, Bo Ming
AU - Tsai, Chien Hung
PY - 2013/11/7
Y1 - 2013/11/7
N2 - A novel adaptive voltage positioning (AVP) buck regulator using adaptive on-time (AOT) control targeted for applications with low-ESR output capacitors is proposed. In this work, AOT control is adapted to keep the system's switching frequency quasi-fixed or independent of the input supply voltage and the AVP mechanism is realized without the need to use conventional error amplifier compensator or extra current-sensing circuit. For ensuring the system's switching frequency not entering the range of acoustic frequency at light load, an AEAF (avoid entering acoustic frequency) circuit is also proposed. For comparison purpose, the implemented buck regulator can be set to operate under AVP or non-AVP mode. This work has been fabricated and verified with a standard 0.18μm CMOS technology. Experimental results show excellent transient recovery time of 4μs (under AVP mode), ±0.11% switching frequency variation (for the specified input voltage range), and 91% peak conversion efficiency.
AB - A novel adaptive voltage positioning (AVP) buck regulator using adaptive on-time (AOT) control targeted for applications with low-ESR output capacitors is proposed. In this work, AOT control is adapted to keep the system's switching frequency quasi-fixed or independent of the input supply voltage and the AVP mechanism is realized without the need to use conventional error amplifier compensator or extra current-sensing circuit. For ensuring the system's switching frequency not entering the range of acoustic frequency at light load, an AEAF (avoid entering acoustic frequency) circuit is also proposed. For comparison purpose, the implemented buck regulator can be set to operate under AVP or non-AVP mode. This work has been fabricated and verified with a standard 0.18μm CMOS technology. Experimental results show excellent transient recovery time of 4μs (under AVP mode), ±0.11% switching frequency variation (for the specified input voltage range), and 91% peak conversion efficiency.
UR - http://www.scopus.com/inward/record.url?scp=84892637262&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84892637262&partnerID=8YFLogxK
U2 - 10.1109/CICC.2013.6658538
DO - 10.1109/CICC.2013.6658538
M3 - Conference contribution
AN - SCOPUS:84892637262
SN - 9781467361460
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - Proceedings of the IEEE 2013 Custom Integrated Circuits Conference, CICC 2013
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 35th Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2013
Y2 - 22 September 2013 through 25 September 2013
ER -