A linear-assisted DC-DC hybrid power converter for envelope tracking RF power amplifiers

This paper presents the design of a linear-assisted hybrid DC-DC power converter for envelope tracking RF power amplifiers. To jointly leverage the high efficiency of switch-mode DC-DC converters and the wide bandwidth capabilities of linear regulators, a hybrid power supply topology is employed. It...

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Bibliographic Details
Published in2014 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 5769 - 5773
Main Authors Bondade, Rajdeep, Yi Zhang, Dongsheng Ma
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2014
Subjects
DC-DC power converters
Hybrid power systems
Power supplies
Radio frequency
Regulators
Switches
Voltage control
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Summary:This paper presents the design of a linear-assisted hybrid DC-DC power converter for envelope tracking RF power amplifiers. To jointly leverage the high efficiency of switch-mode DC-DC converters and the wide bandwidth capabilities of linear regulators, a hybrid power supply topology is employed. It exploits a parallel combination of a switch-mode buck DC-DC converter to provide the average power required by the PA, while a push-pull linear regulator is activated to quickly respond to load transients and for envelope tracking. The proposed power supply was designed with a TSMC 0.35-μm CMOS process. For an input voltage of 3V, the PA supply voltage can be regulated at any voltage level from 0.5V to 2.5V, at a nominal switching frequency of 10MHz. It achieves a maximum efficiency of 91.7% at 500mW.
ISSN:2329-3721
2329-3748
DOI:10.1109/ECCE.2014.6954193