A fast-transient DC-DC buck converter
With the rapid development of system-on-chip integration and continuously scaling-down power supply, nowadays portable battery-powered devices have higher and sharper energy requirements. Switching converters are widely used as voltage regulators in those devices because of its high power-conversion...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Online Access: | http://hdl.handle.net/10356/73635 |
| _version_ | 1826115653284659200 |
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| author | Ding, Xiangbin |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Ding, Xiangbin |
| author_sort | Ding, Xiangbin |
| collection | NTU |
| description | With the rapid development of system-on-chip integration and continuously scaling-down power supply, nowadays portable battery-powered devices have higher and sharper energy requirements. Switching converters are widely used as voltage regulators in those devices because of its high power-conversion efficiency. Due to the high-speed application and different modes operation requirements, the embedded microprocessors or digital systems operate at a higher frequency and the system need to switch between different modes more frequently. The frequently changing load induces significant undershoot/overshoot variation, which will deteriorate the overall system performance and stability. In this prospective, the fast-transient response becomes one of the key requirements for DC-DC converters in nowadays high-performance applications. Investigation of fast-transient techniques has been conducted to improve the transient response of DC-DC buck converters. A new pumping control scheme called Power-Driving-Tracked-Duration (PDTD) control is proposed to enhance the transient performance in the voltage-mode hysteretic DC-DC converters. It operates only when a large load current change is detected. Comparing with conventional counterparts, it simultaneously accelerates the transient response, reduces the undershoot/overshoot voltage and the effect of multiple undershoots/overshoots during the load current transitions. A theoretical analysis is also conducted to validate the circuit technique. The measured output voltage ripple is about 60mVpp. The obtained undershoot/overshoot settling time is 369ns/335ns in response to a 60-to-300mA/300-to-60mA load current step. The peak efficiency is about 93%. The prototype is fabricated using TSMC 40nm CMOS process as a proof-of-concept. |
| first_indexed | 2024-10-01T03:58:37Z |
| format | Thesis |
| id | ntu-10356/73635 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:58:37Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/736352023-07-04T17:14:45Z A fast-transient DC-DC buck converter Ding, Xiangbin School of Electrical and Electronic Engineering Graduate Studies Office Centre for Integrated Circuits and Systems DRNTU::Engineering::Electrical and electronic engineering With the rapid development of system-on-chip integration and continuously scaling-down power supply, nowadays portable battery-powered devices have higher and sharper energy requirements. Switching converters are widely used as voltage regulators in those devices because of its high power-conversion efficiency. Due to the high-speed application and different modes operation requirements, the embedded microprocessors or digital systems operate at a higher frequency and the system need to switch between different modes more frequently. The frequently changing load induces significant undershoot/overshoot variation, which will deteriorate the overall system performance and stability. In this prospective, the fast-transient response becomes one of the key requirements for DC-DC converters in nowadays high-performance applications. Investigation of fast-transient techniques has been conducted to improve the transient response of DC-DC buck converters. A new pumping control scheme called Power-Driving-Tracked-Duration (PDTD) control is proposed to enhance the transient performance in the voltage-mode hysteretic DC-DC converters. It operates only when a large load current change is detected. Comparing with conventional counterparts, it simultaneously accelerates the transient response, reduces the undershoot/overshoot voltage and the effect of multiple undershoots/overshoots during the load current transitions. A theoretical analysis is also conducted to validate the circuit technique. The measured output voltage ripple is about 60mVpp. The obtained undershoot/overshoot settling time is 369ns/335ns in response to a 60-to-300mA/300-to-60mA load current step. The peak efficiency is about 93%. The prototype is fabricated using TSMC 40nm CMOS process as a proof-of-concept. Master of Engineering 2018-04-02T07:20:12Z 2018-04-02T07:20:12Z 2018 Thesis Ding, X. (2018). A fast-transient DC-DC buck converter. Master's thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/73635 10.32657/10356/73635 en 143 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Ding, Xiangbin A fast-transient DC-DC buck converter |
| title | A fast-transient DC-DC buck converter |
| title_full | A fast-transient DC-DC buck converter |
| title_fullStr | A fast-transient DC-DC buck converter |
| title_full_unstemmed | A fast-transient DC-DC buck converter |
| title_short | A fast-transient DC-DC buck converter |
| title_sort | fast transient dc dc buck converter |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | http://hdl.handle.net/10356/73635 |
| work_keys_str_mv | AT dingxiangbin afasttransientdcdcbuckconverter AT dingxiangbin fasttransientdcdcbuckconverter |