48-to-1 V Direct Conversion Using High-Voltage Storage and Low-Voltage Boost Bootstrap Technique and Early Comparison On-Time Generator for Precise Nanosecond Pulses and 90.3% Efficiency in Automotive Applications. - Si-Yi Li; Bo-Ruen Chen; Ke-Horng Chen; Ying-Hsi Lin; Shian-Ru Lin; Tsung-Yen Tsai (IEEE J. Solid State Circuits, 2022)