Abstract
This paper presents an adaptive dropout voltage regulator based on a constant on-time buck converter that improves the light load efficiency. By regulating the gate voltage of the pass transistor of the low dropout regulator (LDO), the dropout voltage is automatically minimized depending on the load current, increasing the end-to-end power conversion efficiency at the light load condition by 11.3%. The proposed direct-charging scheme and simple undershoot detector reduce the droop and improve the efficiency of the LDO. The reference pre-compensation technique is proposed to improve the ripple performance by compensating the reference voltage based on the on-time pulses. The proposed voltage regulator was fabricated by a 0.18-μm CMOS process and occupies 0.2874 mm2
Original language | English |
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Title of host publication | 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781728192017 |
DOIs | |
Publication status | Published - 2021 |
Event | 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Daegu, Korea, Republic of Duration: 2021 May 22 → 2021 May 28 |
Publication series
Name | Proceedings - IEEE International Symposium on Circuits and Systems |
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Volume | 2021-May |
ISSN (Print) | 0271-4310 |
Conference
Conference | 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 |
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Country/Territory | Korea, Republic of |
City | Daegu |
Period | 21/5/22 → 21/5/28 |
Bibliographical note
Publisher Copyright:© 2021 IEEE
Keywords
- Buck converter
- Constant-on-time
- DC-DC converter
- Dropout voltage optimization
- LDO
- Low-dropout regulator
- Power management IC
ASJC Scopus subject areas
- Electrical and Electronic Engineering