A Fast Transient Response Digital LDO with a TDC-Based Signal Converter
The digital low drop-out regulator (LDO) has been used widely in digital circuits for its low supply voltage characteristics. However, as the traditional digital LDOs regulate the output voltage code at a rate of 1 bit per clock cycle, the transient response speed is limited. This paper presents a d...
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| Veröffentlicht in: | Electronics (Basel) 2020-01, Vol.9 (1), p.132 |
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| creator | Zhang, Hongda Wan, Peiyuan Geng, Jiarong Liu, Zhaozhe Chen, Zhijie |
| description | The digital low drop-out regulator (LDO) has been used widely in digital circuits for its low supply voltage characteristics. However, as the traditional digital LDOs regulate the output voltage code at a rate of 1 bit per clock cycle, the transient response speed is limited. This paper presents a digital LDO to improve transient response speed with a multi-bit conversion technique. The proposed technology uses a voltage sensor and a time-to-digital converter to convert the output voltage to digital codes. Based on a 65-nm CMOS process, the proposed DLDO reduces the settling time from 147.8 ns to 25.2 ns on average and the response speed is improved by about six times. |
| doi_str_mv | 10.3390/electronics9010132 |
| format | Article |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute |
| subjects | Circuits CMOS Converters Digital electronics Electric potential Internet of Things Power supply Propagation Sensors Simulation Systems stability Transient response Transistors Voltage |
| title | A Fast Transient Response Digital LDO with a TDC-Based Signal Converter |
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