A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT
Towards the integration of Digital-LDO regulators in the ultra-low-power System-On-Chip Internet-of-Things architecture, the D-LDO architecture should constitute the main regulator for powering digital and mixed-signal loads including the SoC system clock. Such an implementation requires an in-regul...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Journal of Low Power Electronics and Applications |
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| Online Access: | https://www.mdpi.com/2079-9268/10/4/41 |
| _version_ | 1797546093444071424 |
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| author | Christos Konstantopoulos Thomas Ussmueller |
| author_facet | Christos Konstantopoulos Thomas Ussmueller |
| author_sort | Christos Konstantopoulos |
| collection | DOAJ |
| description | Towards the integration of Digital-LDO regulators in the ultra-low-power System-On-Chip Internet-of-Things architecture, the D-LDO architecture should constitute the main regulator for powering digital and mixed-signal loads including the SoC system clock. Such an implementation requires an in-regulator clock generation unit that provides an autonomous D-LDO design. In contrast to contemporary D-LDO designs that employ ring-oscillator architecture which start-up time is dependent on the oscillating frequency, this work presents a design with nano-power consumption, fabricated with an active area of 0.035 <inline-formula><math display="inline"><semantics><mrow><mi mathvariant="normal">m</mi><msup><mi mathvariant="normal">m</mi><mn>2</mn></msup></mrow></semantics></math></inline-formula> at a 55-nm Global Foundries CMOS process that introduces a fast start-up burst oscillator based on a high-gain stage with wake-up time independent of D-LDO frequency. In combination with linear search coarse regulation and asynchronous fine regulation, it succeeds 558 nA minimum quiescent current with <inline-formula><math display="inline"><semantics><msub><mi>C</mi><mi>L</mi></msub></semantics></math></inline-formula> 75 pF, maximum current efficiency of 99.2% and 1.16x power efficiency improvement compared to analog counterpart oriented to SoC-IoT loads. |
| first_indexed | 2024-03-10T14:25:11Z |
| format | Article |
| id | doaj.art-5c96a86266bf4724aa83c8831ab6028a |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-03-10T14:25:11Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-5c96a86266bf4724aa83c8831ab6028a2023-11-20T23:04:20ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682020-12-011044110.3390/jlpea10040041A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoTChristos Konstantopoulos0Thomas Ussmueller1Department of Mechatronics, University of Innsbruck, A-6020 Innsbruck, AustriaDepartment of Mechatronics, University of Innsbruck, A-6020 Innsbruck, AustriaTowards the integration of Digital-LDO regulators in the ultra-low-power System-On-Chip Internet-of-Things architecture, the D-LDO architecture should constitute the main regulator for powering digital and mixed-signal loads including the SoC system clock. Such an implementation requires an in-regulator clock generation unit that provides an autonomous D-LDO design. In contrast to contemporary D-LDO designs that employ ring-oscillator architecture which start-up time is dependent on the oscillating frequency, this work presents a design with nano-power consumption, fabricated with an active area of 0.035 <inline-formula><math display="inline"><semantics><mrow><mi mathvariant="normal">m</mi><msup><mi mathvariant="normal">m</mi><mn>2</mn></msup></mrow></semantics></math></inline-formula> at a 55-nm Global Foundries CMOS process that introduces a fast start-up burst oscillator based on a high-gain stage with wake-up time independent of D-LDO frequency. In combination with linear search coarse regulation and asynchronous fine regulation, it succeeds 558 nA minimum quiescent current with <inline-formula><math display="inline"><semantics><msub><mi>C</mi><mi>L</mi></msub></semantics></math></inline-formula> 75 pF, maximum current efficiency of 99.2% and 1.16x power efficiency improvement compared to analog counterpart oriented to SoC-IoT loads.https://www.mdpi.com/2079-9268/10/4/41Digital Low Drop-Out Regulators (D-LDO)Internet of ThingsSystem-on-Chipenergy harvestingpower managementRadio Frequency Identification (RFID) |
| spellingShingle | Christos Konstantopoulos Thomas Ussmueller A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT Journal of Low Power Electronics and Applications Digital Low Drop-Out Regulators (D-LDO) Internet of Things System-on-Chip energy harvesting power management Radio Frequency Identification (RFID) |
| title | A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT |
| title_full | A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT |
| title_fullStr | A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT |
| title_full_unstemmed | A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT |
| title_short | A Nano-Power 0.5 V Event-Driven Digital-LDO with Fast Start-Up Burst Oscillator for SoC-IoT |
| title_sort | nano power 0 5 v event driven digital ldo with fast start up burst oscillator for soc iot |
| topic | Digital Low Drop-Out Regulators (D-LDO) Internet of Things System-on-Chip energy harvesting power management Radio Frequency Identification (RFID) |
| url | https://www.mdpi.com/2079-9268/10/4/41 |
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