DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Myungjun | ko |
dc.contributor.author | Cho, SeongHwan | ko |
dc.date.accessioned | 2023-02-22T01:00:35Z | - |
dc.date.available | 2023-02-22T01:00:35Z | - |
dc.date.created | 2023-01-02 | - |
dc.date.created | 2023-01-02 | - |
dc.date.issued | 2023-02 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, v.70, no.2, pp.642 - 654 | - |
dc.identifier.issn | 1549-8328 | - |
dc.identifier.uri | http://hdl.handle.net/10203/305336 | - |
dc.description.abstract | In this paper, we propose an output-capacitorless analog low-dropout voltage regulator (ALDO) featuring frequency compensation of a four-stage amplifier consisting of a three-stage error amplifier (EA) without cascoding plus a last stage formed by a pass transistor (M-p). It achieves good output voltage regulation under low supply-voltage (V-dd) with an unsaturated M-p (e.g., dropout voltage of 30 mV under 0.5 V supply) because of the three gain stages in the EA. Frequency compensation is achieved by performing a two-port feedback analysis with the root-locus diagram (TFR) method that provides an intuitive understanding of pole/zero dynamics in the s-plane. Fabricated in 0.18 gm CMOS, the proposed ALDO achieves asymptotic stability over a wide range of operating conditions: V-dd of 0.5 similar to 1.8 V, load capacitance of 0 similar to 50 pF, load current (I-L) of 0 similar to 2 mA (0 similar to 200 mA) under V-dd of 0.5 V (1.8 V), and temperature of -20 similar to 125 degrees C. Also, it does not require minimum on-chip output capacitance, thus achieving a small area of 0.0035 mm(2). As a result, a good low-frequency PSR of -62 dB with a dropout voltage of 30 mV and a state-of-the-art current density of 11.4 A/mm(2) are achieved. | - |
dc.language | English | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.title | An Output-Capacitorless Analog LDO Featuring Frequency Compensation of Four-Stage Amplifier | - |
dc.type | Article | - |
dc.identifier.wosid | 000896605300001 | - |
dc.identifier.scopusid | 2-s2.0-85144066331 | - |
dc.type.rims | ART | - |
dc.citation.volume | 70 | - |
dc.citation.issue | 2 | - |
dc.citation.beginningpage | 642 | - |
dc.citation.endingpage | 654 | - |
dc.citation.publicationname | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | - |
dc.identifier.doi | 10.1109/TCSI.2022.3223236 | - |
dc.contributor.localauthor | Cho, SeongHwan | - |
dc.contributor.nonIdAuthor | Kim, Myungjun | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Operational amplifier | - |
dc.subject.keywordAuthor | low-dropout regulator (LDO) | - |
dc.subject.keywordAuthor | stability | - |
dc.subject.keywordAuthor | frequency compensation | - |
dc.subject.keywordAuthor | poles and zeros | - |
dc.subject.keywordAuthor | two-port feedback analysis | - |
dc.subject.keywordAuthor | root-locus diagram | - |
dc.subject.keywordPlus | LOW-DROPOUT REGULATOR | - |
dc.subject.keywordPlus | CMOS | - |
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