TY - GEN
T1 - A Low-Dropout Linear Regulator with High Power Supply Rejection
AU - Li, Zhipei
AU - Xie, Zhiyi
AU - Shen, Jiapeng
AU - Diao, Shengxi
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - To suppress the input voltage noise, a low dropout linear regulator (LDO) with high power supply rejection ratio is designed. Through the theoretical analysis and calculation of the power supply rejection and stability of traditional LDO, a feedforward ripple cancellation technique is proposed in this paper. This is achieved by implementing a feedforward path which transfers the power supply noise equally to the gate of the power transistor. It can optimize the power supply rejection (PSR) of LDO. The design and simulation are completed using 0.18um BCD technology. According to the post-layout simulation results, it can be seen that the quiescent current is 445uA. With no load, the PSR of LDO is -102.6 dB and -90.3 dB at DC and 1 MHz, respectively. With a 100 mA load current, the PSR of LDO is -99.3dB and -96.1dB at DC and 1 MHz, respectively. The output integral noise from 10Hz to 100 KHz is 25.63uV RMS. The active area of the proposed LDO is 0.102mm2
AB - To suppress the input voltage noise, a low dropout linear regulator (LDO) with high power supply rejection ratio is designed. Through the theoretical analysis and calculation of the power supply rejection and stability of traditional LDO, a feedforward ripple cancellation technique is proposed in this paper. This is achieved by implementing a feedforward path which transfers the power supply noise equally to the gate of the power transistor. It can optimize the power supply rejection (PSR) of LDO. The design and simulation are completed using 0.18um BCD technology. According to the post-layout simulation results, it can be seen that the quiescent current is 445uA. With no load, the PSR of LDO is -102.6 dB and -90.3 dB at DC and 1 MHz, respectively. With a 100 mA load current, the PSR of LDO is -99.3dB and -96.1dB at DC and 1 MHz, respectively. The output integral noise from 10Hz to 100 KHz is 25.63uV RMS. The active area of the proposed LDO is 0.102mm2
KW - bandgap reference
KW - feedforward ripple cancellation
KW - low dropout linear regulator (LDO)
KW - power supply rejection(PSR)
UR - https://www.scopus.com/pages/publications/85183317245
U2 - 10.1109/CISP-BMEI60920.2023.10373225
DO - 10.1109/CISP-BMEI60920.2023.10373225
M3 - 会议稿件
AN - SCOPUS:85183317245
T3 - Proceedings - 2023 16th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2023
BT - Proceedings - 2023 16th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2023
A2 - Zhao, XiaoMing
A2 - Li, Qingli
A2 - Wang, Lipo
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2023
Y2 - 28 October 2023 through 30 October 2023
ER -