A novel dual-feed low-dropout regulator

作者：Duan Zhikui; Hu Jianguo; Ding Yi; Lu Chong; Ding Yanyu; Wang Deming; Tan Hongzhou; School of Information Science; Technology Sun Yat Sen University

来源：Chinese Journal of Semiconductors, 2015, 36(06): 114-118.

DOI：10.1088/1674-4926/36/6/065003

A novel dual-feed(DF) low-dropout(LDO) is presented. The DF-LDO adopts dual control loops to maintain the output voltage. The dual control loops include a feedback loop and a feedforward loop. There is an equilibrium point in dual control loops, and the equilibrium point is the output voltage of the DF-LDO. In addition,the transient performance is optimized by adjusting the damping ratio and natural frequency. With a 1 F decoupling capacitor, the proposed DF-LDO is fabricated in a 0.18 m CMOS process and its output voltage is 1.5 V. When the workload changes from 100 A to 100 m A in 100 ns, load regulation of 7 m V for a 100 m A step is achieved,the settling time is 997 ns and the undershoot is 12.8 m V; when the workload changes from 100 m A to 100 A in100 ns, the settling time is 249 ns with an imperceptible overshoot.

• 出版日期2015-6-15
• 单位中山大学