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Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement
Huang, Mo1; Lu, Yan2; Lu, Xing1
2018-03-08
Source PublicationELECTRONICS LETTERS
ISSN0013-5194
Volume54Issue:5Pages:282-283
Abstract

A partial analogue-assisted (AA) digital low dropout regulator (D-LDO) with also a transient body-drive (BD) technique is proposed. The body of the power switches can be driven by the V-OUT transient spike that is high-pass coupled from the D-LDO output when a load step occurs, for a temporary threshold voltage change. The BD technique thereby manages to provide more than 10% momentary output current. In addition, since the effectiveness of the AA loop is proportional to the ratio of the coupling capacitance and the parasitic capacitance, here, only about 1/5 of the most significant bit of the power switches are connected to the AA and BD networks. Therefore, the coupling capacitors are much reduced, comparing to the previous work. A simulated 100 mV undershoot is obtained under a 2-to-12 mA load step within 1 ns edge time, using only 40 pF total capacitor. A 0.09 ps figure-of-merit (FOM) of speed is thereby achieved, which is at least 2.5x better than state-of-the-art works.

KeywordVoltage Regulators Power Semiconductor Switches Partial Analogue-assisted Digital Low Dropout Regulator Transient Body-drive Technique Fom Improvement Partial Aa D-ldo Transient Bd Technique Power Switches Transient Spike Temporary Threshold Voltage Change Momentary Output Current Coupling Capacitance Parasitic Capacitance Coupling Capacitors Total Capacitor Figure-of-merit Voltage 100 Mv Current 2 Ma To 12 Ma Capacitance 40 Pf
DOI10.1049/el.2017.4211
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000426262200016
PublisherINST ENGINEERING TECHNOLOGY-IET
The Source to ArticleWOS
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Citation statistics
Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
Corresponding AuthorLu, Xing
Affiliation1.South China Univ Technol, Guangzhou, Guangdong, Peoples R China
2.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau, Peoples R China
Recommended Citation
GB/T 7714
Huang, Mo,Lu, Yan,Lu, Xing. Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement[J]. ELECTRONICS LETTERS,2018,54(5):282-283.
APA Huang, Mo,Lu, Yan,&Lu, Xing.(2018).Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement.ELECTRONICS LETTERS,54(5),282-283.
MLA Huang, Mo,et al."Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement".ELECTRONICS LETTERS 54.5(2018):282-283.
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