TY - JOUR
T1 - 0.293-mm2 Fast Transient Response Hysteretic Quasi-V2 DC-DC Converter with Area-Efficient Time-Domain-Based Controller in 0.35-μm CMOS
AU - Jung, Dong Hoon
AU - Kim, Kiryong
AU - Joo, Sunghwan
AU - Jung, Seong Ook
N1 - Publisher Copyright:
© 1966-2012 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - A time-domain-control-based quasi- V2 buck converter with small area, fast transient response, wide load current range, and constant switching frequency is proposed in this paper. The proposed time-domain-based controller achieves compact core area and simplified constant switching frequency control by replacing the conventional voltage-domain comparator with a phase detector having an adaptive detection window. Moreover, a coupling-based inductor current emulator is also proposed to support the discontinuous conduction mode operation in the light load. The proposed buck converter is implemented using 0.35- μm CMOS process. The core area of the proposed buck converter is only 0.293 mm2. The measured peak efficiency in the continuous conduction mode is 92% and the end-to-end efficiency in the load current range of 25-700 mA is 73%. The undershoot/overshoot and recovery time with the up/down load current steps of 510 mA are 38/20 mV and 2.5/2.6 μs , respectively.
AB - A time-domain-control-based quasi- V2 buck converter with small area, fast transient response, wide load current range, and constant switching frequency is proposed in this paper. The proposed time-domain-based controller achieves compact core area and simplified constant switching frequency control by replacing the conventional voltage-domain comparator with a phase detector having an adaptive detection window. Moreover, a coupling-based inductor current emulator is also proposed to support the discontinuous conduction mode operation in the light load. The proposed buck converter is implemented using 0.35- μm CMOS process. The core area of the proposed buck converter is only 0.293 mm2. The measured peak efficiency in the continuous conduction mode is 92% and the end-to-end efficiency in the load current range of 25-700 mA is 73%. The undershoot/overshoot and recovery time with the up/down load current steps of 510 mA are 38/20 mV and 2.5/2.6 μs , respectively.
KW - Coupling-based inductor current emulator (C-ICE)
KW - DC-DC buck converter
KW - fast transient response
KW - hysteretic quasi-V control
KW - time-domain-based controller
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U2 - 10.1109/JSSC.2018.2805884
DO - 10.1109/JSSC.2018.2805884
M3 - Article
AN - SCOPUS:85045181113
SN - 0018-9200
VL - 53
SP - 1844
EP - 1855
JO - IEEE Journal of Solid-State Circuits
JF - IEEE Journal of Solid-State Circuits
IS - 6
ER -