98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition

A noninverting buck-boost dc-dc converter can work in buck, boost, or buck-boost mode. Hence, it provides a good solution when the input voltage may be higher or lower than the output voltage. However, a buck-boost converter requires four power transistors, rather than two. Therefore, its efficiency...

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Veröffentlicht in:	IEEE transactions on power electronics 2017-03, Vol.32 (3), p.2008-2017
Hauptverfasser:	Hong, Xiang-En, Wu, Jian-Fu, Wei, Chia-Ling
Format:	Artikel
Sprache:	eng
Schlagworte:	Batteries Buck–boost Capacitors Circuits CMOS Converters Efficiency Electric potential Energy conversion efficiency Hysteresis hysteretic-current-mode (HCM) Inductors mode transition Power semiconductor devices Power transistors Semiconductor devices Signal processing Switches Switching loss switching regulator Transistors Voltage control Voltage converters (DC to DC)
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container_end_page	2017
container_issue	3
container_start_page	2008
container_title	IEEE transactions on power electronics
container_volume	32
creator	Hong, Xiang-En Wu, Jian-Fu Wei, Chia-Ling
description	A noninverting buck-boost dc-dc converter can work in buck, boost, or buck-boost mode. Hence, it provides a good solution when the input voltage may be higher or lower than the output voltage. However, a buck-boost converter requires four power transistors, rather than two. Therefore, its efficiency decreases, due to the conduction and switching losses of the two extra power transistors. Another issue of a buck-boost converter is how to smoothly switch its operational mode, when its input voltage approaches its output voltage. A hysteretic-current-mode noninverting buck-boost converter with high efficiency and smooth mode transition is proposed, and it was designed and fabricated using TSMC 0.35-μm CMOS 2P4 M 3.3 V/5V mixed-signal polycide process. The input voltage may range from 2.5 to 5 V, the output voltage is 3.3 V, and the maximal load current is 400 mA. According to the measured results, the maximal efficiency reaches 98.1%, and the efficiencies measured in the entire input voltage and loading ranges are all above 80%.
doi_str_mv	10.1109/TPEL.2016.2567484
format	Article
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subjects	Batteries Buck–boost Capacitors Circuits CMOS Converters Efficiency Electric potential Energy conversion efficiency Hysteresis hysteretic-current-mode (HCM) Inductors mode transition Power semiconductor devices Power transistors Semiconductor devices Signal processing Switches Switching loss switching regulator Transistors Voltage control Voltage converters (DC to DC)
title	98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition
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