An Adaptive Gate Driver-Assisted Continuously Scalable-Conversion-Ratio Switched-Capacitor Converter
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This paper presents an adaptive gate driver-assisted continuously scalable-conversion-ratio (CSCR) switched-capacitor (SC) DC-DC converter. Gate-source voltage controller (GSVC) generates dynamic supply voltage to the gate driver adaptively according to the output voltage level of the converter. By adopting an adaptive gate driver to achieve soft charging between capacitor connections, the overall system generates a wide range of output with high power density and power conversion efficiency. The proposed converter generates an output range from 0.7 V to 1.8 V from an input voltage of 2.9 V. The proposed converter achieves a peak PCE of 72%. The proposed converter is implemented in TSMC 180 nm BCD process, with a chip area of 3 mm x4 mm.
Abstract
This paper presents an adaptive gate driver-assisted continuously scalable-conversion-ratio (CSCR) switched-capacitor (SC) DC-DC converter. Gate-source voltage controller (GSVC) generates dynamic supply voltage to the gate driver adaptively according to the output voltage level of the converter. By adopting an adaptive gate driver to achieve soft charging between capacitor connections, the overall system generates a wide range of output with high power density and power conversion efficiency. The proposed converter generates an output range from 0.7 V to 1.8 V from an input voltage of 2.9 V. The proposed converter achieves a peak PCE of 72%. The proposed converter is implemented in TSMC 180 nm BCD process, with a chip area of 3 mm x4 mm.