A reconfigurable Buck-Boost Cross-Coupled charge Pump

This paper presents a reconfigurable buck-boost Charge Pump (CP) based on the cross-coupled topology. The proposed CP is a switched capacitor (SC) converter merging different ratios and operation modes in one topology. The converter is able to step-up or step-down the input voltage at the output onl...

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Bibliographic Details
Published in:International journal of electronics and communications 2024-10, Vol.185, p.155454, Article 155454
Main Authors: Keramida, Evi, Souliotis, George, Plessas, Fotis
Format: Article
Language:English
Subjects:
Buck-Boost Converter
Charge Pump
DC-DC converter
Efficiency
Multi Ratio Charge Pump
Step-up Step down
Switched Capacitor Converter
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Summary:This paper presents a reconfigurable buck-boost Charge Pump (CP) based on the cross-coupled topology. The proposed CP is a switched capacitor (SC) converter merging different ratios and operation modes in one topology. The converter is able to step-up or step-down the input voltage at the output only by controlling the external connections of the circuit. By achieving various conversion ratios and operation modes, higher efficiency levels are performed maximizing the power that is delivered to the load. The reconfigurable buck-boost CP has been designed in 65 nm TSMC CMOS technology and covers an input voltage range from 1.6 V to 3.2 V and an output voltage range also from 1.6 V to 3.2 V in the boost mode and an input voltage range from 2.6 V to 3.6 V and an output voltage range from 1.4 to 1.8 V in the buck mode. In addition, efficiency estimation analysis is presented and proves how parasitic capacitances of flying capacitors affect the overall efficiency of a multi-ratio converter. The converter indicates peak efficiency equal to 77 % and delivers up to 4 mA load current.
ISSN:1434-8411
DOI:10.1016/j.aeue.2024.155454