An 8 MHz Boost Converter with Feed-Forward Compensation and Adaptive Dead-Time Control

Abstract

This paper proposes an 8 MHz boost converter with optimized line transient response and adaptive dead time for energy harvest system. The feed-forward compensation technique is proposed to achieve rapid line transient response. A dead-time control circuit is presented to achieve the adaptive dead time, which minimizes the body-diode conduction loss and thus improves the efficiency. The proposed converter is implemented in $0.18\,\mu \mathrm {m}$ standard CMOS process with an active area of $0.80\times 0.75 \mathrm {m}\mathrm {m}^{2}$. According to the simulation results, the line transient response is improved by 86.6%. Less than 1 ns body-diode conduction time has been achieved without bringing in shoot-through current across 10–150 mA load current range. The 1.8 V output voltage is achieved from 0.35–1.5V input voltage, and the peak efficiency is 88.9%.