A 0.42-V input boost dc-dc converter with pseudo-digital pulsewidth modulation

• Main Authors: Sun, Zhuochao, Chew, Roy Kin Wai, Tang, Howard, Yu, Guolei, Siek, Liter
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Electrical and electronic engineering; Boost DC-DC Converter; Pseudo-Digital Pulse Width Modulation (P-DPWM)
• Online Access: https://hdl.handle.net/10356/152146
• Institution: Nanyang Technological University

A pseudo-digital pulsewidth modulation (P-DPWM) controlled boost direct current-direct current converter is presented in this brief. By applying low-voltage analog design techniques into the traditional digital pulsewidth modulation (DPWM) structure, the proposed P-DPWM achieves new features of high resolution, low power, and small area while retaining the low-supply feature of the DPWM. A test chip has been designed and fabricated in a 65-nm CMOS process with an area of 1.44 mm² to validate its performance. A peak efficiency of 86% is achieved. The correct functionality is also demonstrated with the controller supply as low as 0.42 V, which is ideal for sub-1 V low-supply applications.