응답 시간을 향상 시킨 외부 커패시터가없는 Low-Dropout 레귤레이터 회로

초록

In this paper, an output-capacitorless, low-dropout (LDO) regulator is designed, which consumes 4.5㎂ quiescent current. Proposed LDO regulator is realized using two amplifier for good load regulation and fast response time, which provide high gain, high bandwidth, and high slew rate. In addition, a one-shot current boosting circuit is added for current control to charge and discharge the parasitic capacitance at the pass transistor gate. As a result, response time is improved during load-current transition. The designed circuit is implemented through a 0.11-㎛ CMOS process. We experimentally verify output voltage fluctuation of 260㎷ and recovery time of 0.8㎲ at maximum load current 200㎃.

키워드