标题：A High-Accuracy and Robust Low Drop-Out Regulator for Outdoor Decorative Lighting LED Driver
作者：Pan, Luwei; Zhou, Li; Sun, Tao; Wei, Ying; Gao, Yuanyuan; Chen, Peng
作者机构：[Sun, Tao] Univ Jinan, Shandong Prov Key Lab Network Based Intelligent C, Jinan 250022, Peoples R China.; [Pan, Luwei; Zhou, Li; Wei, Ying; Gao, Yua 更多
会议名称：International Conference on Mechatronics and Information Technology (ICMIT 2013)
会议日期：OCT 19-20, 2013
来源：PROGRESS IN MECHATRONICS AND INFORMATION TECHNOLOGY, PTS 1 AND 2
关键词：BCD process; Low Drop-Out Regulator; Process corner; Digital trim signal
摘要：A high-accuracy and robust LDO was designed based on CSMC 0.5um 40V BCD process, it was integrated in an outdoor decorative lighting LED Control and Driver SOC. The input of SOC was a 12V similar to 40V power which was used by LED lamp. The LDO converted the input power of SOC to a 5V power for the Digital Control and Signal Transmission circuits inside the SOC. Due to the application requirements of SOC, the robustness of LDO in -55 similar to 150 degrees C temperature and 12V similar to 40V power voltage conditions must be guaranteed. The process variations and application conditions would affect the output voltage of LDO, 3 bits digital trim signal Trim[3:1] and a trim circuit were utilized to improve the accuracy of LDO's output voltage. Simulation result shows that the LDO works robustly and the output voltage accuracy can be improved to +/- 0.5% max in all conditions after being trimmed.