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

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 μm standard CMOS process with an active area of 0.80×0.75 mm
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 0.35-1.5 V input voltage, and the peak efficiency is 88.9%.