Peak Current Mode Controlled Single-Inductor Dual-Output Buck Converter with Low Line and Cross Regulations

Abstract

This thesis proposes a peak current-mode control on the single-inductor dual-output (SIDO) buck converter The peak current-mode control topology not only reduces the complexity of the compensator design but also enhances the line/load regulation compared to that of the voltage-mode control For the ease of compensator design modeling of the current-mode control on the SIDO buck converter should be well defined Therefore this thesis elaborates the time domain and frequency domain characteristics of the SIDO buck converter as it operates in continuous conduction mode In addition phase sequence interchange (PSI) mechanism is supplemented to suppress the intrinsic cross-regulation that is induced by power distribution mechanism The proposed converter was fabricated by using TSMC 0 35um 2P4M CMOS process The chip size is 2 08×1 80 mm^2 The input voltage range is from 2 7V to 3 5V two output voltages are set as 1 5V and 1 8V with its total maximum output power equal to 0 825W Testing results show that measured line regulation self-regulation and cross-regulation are 0 0467% and 0 0611% 0 14 and 0 1 0 05 and 0 115 (mV/mA) respectively

Date of Award	2017 Jan 25
Original language	English
Supervisor	Le-Ren Chang-Chien (Supervisor)