TY - GEN
T1 - A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response
AU - Wang, Pai Yi
AU - Wu, Li Te
AU - Kuo, Tai Haur
PY - 2015/1/13
Y1 - 2015/1/13
N2 - Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm2 achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.
AB - Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm2 achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.
UR - http://www.scopus.com/inward/record.url?scp=84922540917&partnerID=8YFLogxK
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U2 - 10.1109/ASSCC.2014.7008862
DO - 10.1109/ASSCC.2014.7008862
M3 - Conference contribution
T3 - 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers
SP - 69
EP - 72
BT - 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 10th IEEE Asian Solid-State Circuits Conference, A-SSCC 2014
Y2 - 10 November 2014 through 12 November 2014
ER -