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Dual Active-Feedback Frequency Compensation for Output-Capacitorless LDO with Transient and Stability Enhancement in 65-nm CMOS
Li,Guangxiang1,2; Qian,Huimin1; Guo,Jianping1; Mo,Bing1,3,4; Lu,Yan5; Chen,Dihu1
2020
Source PublicationIEEE TRANSACTIONS ON POWER ELECTRONICS
ISSN0885-8993
Volume35Issue:1Pages:415-429
Abstract

An output-capacitorless low-dropout regulator (OCL-LDO) using a dual-active feedback frequency compensation (DAFFC) scheme with both transient and stability enhancement has been presented in this paper. The DAFFC scheme consists of two parallel active feedback paths, which creates two pole-zero pairs to effectively enhance the stability and transient response for the proposed OCL-LDO. Compared to the conventional single-path active-feedback frequency compensation method, the proposed DAFFC technique has provided one more design freedom with one more active feedback loop deployed and has been proved to be capable of obtaining better compensation effects with the same capacitor budget. Besides, the induced extra ac currents by the two active feedback loops have also enhanced the transient response of the proposed OCL-LDO. To substantiate the proposed DAFFC, a telescopic cascode output stage for error amplifier, and two on-chip compensation capacitors (5 and 1 pF, respectively) are needed. The proposed OCL-LDO has been implemented in 65-nm CMOS technology and the active chip area is 0.0105 mm. The output voltage is 0.8 V, and the minimum input voltage is 0.95 V at 100-mA loading current. The proposed OCL-LDO can work stably in a load range of 0 to 100 mA with 14-μA quiescent current.

KeywordCapacitorless Dual Active-feedback Frequency Compensation (Daffc) Low-dropout Regulator (Ldo) Stability Telescopic Cascode Output Stage
DOI10.1109/TPEL.2019.2910557
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000506165200037
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141
Scopus ID2-s2.0-85074198185
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Citation statistics
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
Corresponding AuthorGuo,Jianping
Affiliation1.School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou,510006,China
2.Renesas Electronics America Inc.,Bridgewater,08807,United States
3.Nanjing University of Science and Technology,Nanjing,210094,China
4.Silicon (Shenzhen) Electronic Technology Co.,Ltd.,Shenzhen,518000,China
5.State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macau,Macao,Macao
Recommended Citation
GB/T 7714
Li,Guangxiang,Qian,Huimin,Guo,Jianping,et al. Dual Active-Feedback Frequency Compensation for Output-Capacitorless LDO with Transient and Stability Enhancement in 65-nm CMOS[J]. IEEE TRANSACTIONS ON POWER ELECTRONICS, 2020, 35(1), 415-429.
APA Li,Guangxiang., Qian,Huimin., Guo,Jianping., Mo,Bing., Lu,Yan., & Chen,Dihu (2020). Dual Active-Feedback Frequency Compensation for Output-Capacitorless LDO with Transient and Stability Enhancement in 65-nm CMOS. IEEE TRANSACTIONS ON POWER ELECTRONICS, 35(1), 415-429.
MLA Li,Guangxiang,et al."Dual Active-Feedback Frequency Compensation for Output-Capacitorless LDO with Transient and Stability Enhancement in 65-nm CMOS".IEEE TRANSACTIONS ON POWER ELECTRONICS 35.1(2020):415-429.
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