Load Transient Detection 구조 및 개선된 과도응답 특성을 갖는 LDO regulator
LDO Regulator with Improved Transient Response Characteristics and Load Transient Detection Structure
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초록
기존 LDO 레귤레이터 외부 커패시터는 오버슈트 및 언더슈트와 같은 과도 응답 특성을 줄일 수 있다. 그러나 본 연구에서 제안한Capless LDO 레귤레이터는 과도 응답을 개선하고 우수한 전류 구동 능력을 제공하기 위해 패스 트랜지스터에 바디 기술을 적용하였다. 제안하는 LDO 레귤레이터의 동작 조건은 3.3V ~ 4.5V 범위의 입력 전압, 최대 부하 전류 200mA, 출력 전압 3V로 설정하였다. 측정 결과, 부하 전류가 100mA일 때 전압은 언더슈트 상태에서 95 mV, 오버슈트 상태에서 105 mV임을 확인 할 수 있었다.
Abstract
Conventional LDO regulator external capacitors can reduce transient response characteristics such as overshootand undershoot. However, the capacitorless LDO regulator proposed in this study applied body technology to thepass transistor to improve the transient response and provide excellent current drive capability. The operatingconditions of the proposed LDO regulator are set to an input voltage that varies from 3.3V to 4.5V, a maximumload current of 200mA, and an output voltage of 3V. As a result of the measurement, it was found that when theload current was 100 mA, the voltage was 95 mV in the undershoot state and 105 mV in the overshoot state.
참고문헌 (8)
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