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LDO Regulator with Feedback Network Improved Transient Response

과도응답을 향상시킨 피드백 구조를 갖는 LDO 레귤레이터

  • Received : 2016.09.20
  • Accepted : 2016.09.28
  • Published : 2016.09.30

Abstract

In this paper, we propose LDO regulator with improved transient using a simple feedback structure in conventional LDO regulator. This proposed circuit has the feedback structure which reduces the response time of overshoot appeared in the output of conventional LDO regulator. Therefore, this LDO regulator can be a more stable operation. Thus, the proposed feedback structure is to operate such as conventional LDO regulator without changing the area, it complements the disadvantage of LDO regulator with noise in the output. This circuit was designed to using a Dongbu Hitek 0.18um CMOS process.

본 논문에서는 기존 LDO 레귤레이터에서 간단한 피드백 구조를 이용하여 과도응답을 향상시킨 LDO 레귤레이터를 제안한다. 이 제안된 회로는 기존 LDO 레귤레이터에서 나타나는 오버슈트의 응답시간을 감소시켜 더 안정적인 동작을 하도록 하는 피드백 구조를 갖는다. 제안 된 피드백 구조는 큰 면적의 변화 없이 기존 LDO 레귤레이터와 같은 동작을 하며, 출력에서의 노이즈를 갖는 LDO 레귤레이터의 단점을 보완한다. 설계한 회로는 동부 하이텍의 0.18um CMOS 공정을 이용하였다.

Keywords

References

  1. Texas Instruments, "Understanding the terms and definitions of LDO voltage regulators"
  2. Jae-Jin Yeo and Jeong-Jin Roh, "Low-Dropout Regulator with enhanced response time," j.inst. Korean.electr.electron.eng. Vol.19,No. 4, 506-513, December 2015
  3. Socheat HENG and Cong-Kha PHAM, "Quick Response Circuit for Low-power LDO Voltage Regulator to improve Load transient response, 2007 International Symposium on Communications and Information Technologies (ISCIT 2007)
  4. Behnam Samadpoor Rikan "A High Current Efficiency CMOS LDO Regulator with Low Power Consumption and Small Output Voltage Variation," j.inst. Korean.electr.electron.eng. Vol.18,No.1, 37-44, March 2014
  5. Jianping Guo(2010) "A Capacitorless LDO Regulator With Fast Feedback Technique and Low-Quiescent Current Error Amplifier," Circuit and Systems, IEEE Transactions on, vol. 60, pp.326-330.