DOI QR코드

DOI QR Code

높은 PSRR을 갖는 Low-Dropout(LDO) 레귤레이터

High PSRR Low-Dropout(LDO) Regulator

  • Kim, In-Hye (Dept. of Electronics and Communication engineering, Hanyang University) ;
  • Roh, Jeong-Jin (Dept. of Electronics and Communication engineering, Hanyang University)
  • 투고 : 2016.09.20
  • 심사 : 2016.09.29
  • 발행 : 2016.09.30

초록

IoT 산업이 빠르게 성장하면서 전원 관리 집적회로의 중요성이 부각되고 있다. 본 논문에서는 리플 Subtractor, 피드 포워드 커패시터, OTA를 이용한 LDO 구조를 제안한다. 이를 통해 10MHz가 넘는 고주파 영역에서도 -40dB 이상 높은 전원 전압 제거비(PSRR)를 얻었다. 설계된 Low-Dropout(LDO) 레귤레이터는 $0.18{\mu}m$ CMOS 공정에서 설계되었으며 시뮬레이션 결과 PSRR은 부하 전류 40mA, 500kHz에서 -73.4dB다. 최대 구동 가능 전류는 40mA이다.

As IoT industry are growing fast, The importance of power management system is also being magnified. CMOS High power-supply rejection ratio(PSRR) Low-dropout(LDO) regulator is achieved by the proposed ripple Subtractor, Feed-forward capacitor and OTA in this paper. The LDO is implemented in $0.18-{\mu}m$ CMOS technology. With the proposed structures, in the maximum loading of 40mA, Simulation result achieves PSRR of -73.4dB at 500kHz and PSRR better than -40dB when frequency is below 10MHz with $6.8-{\mu}F$ output capacitor.

키워드

참고문헌

  1. Ho-Joon Jang, Yong-Seong Roh, Young-Jin Moon, Jeongpyo Park, and Changsik Yoo, "Low Drop-out(LDO) Voltage Regulator with Improved Power Supply Rejection." IEEE JOUNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, Vol. 12, no. 3, pp. 313-319, September 2012 https://doi.org/10.5573/JSTS.2012.12.3.313
  2. Saikrishna Ganta, Chang-Joon Park, Daniel Gitzel, Rafael Rivera and Jose Silva-Martinez, "An External Capacitor-less Low Drop-Out Regulator with Superior PSR and Fast Transient Response." 2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS), 2013, pp. 137-140
  3. J. Roh, "High-Gain Class-AB OTA with Low quiescent Current." Analog Integrated Circuits and Signal Processing, vol.47, No.2, pp.225-228, March 2006. https://doi.org/10.1007/s10470-006-4959-1
  4. Ju-Won Park, In-Ho Jun, Jeong-Jin Roh, "An Efficient Voltage Mode 2-Phase Buck Converter for Mobile Systems." j.inst.Korean.electr.electron.eng, Vol. 18, no. 3, pp. 320-327, September 2014
  5. Mohamed El-Nozahi; Ahmed Amer; Joselyn Torres; Kamran Entesari; Edgar Sanchez-Sinencio, "High PSR Low Drop-Out Regulator With Feed-Forward Ripple Cancellation Technique," IEEE Journal of Solid-State Circuits, Vol. 45, no.3, pp. 565-577, March 2010 https://doi.org/10.1109/JSSC.2009.2039685