Ting C.-YLin J.-YCHUNG-PING CHEN2021-09-022021-09-02202015497747https://www.scopus.com/inward/record.uri?eid=2-s2.0-85080895668&doi=10.1109%2fTCSII.2019.2915377&partnerID=40&md5=3cbd263b5dd643fa19f5a69782ce3dc9https://scholars.lib.ntu.edu.tw/handle/123456789/580766This brief proposes a buck converter with adaptive constant on time (ACOT) control, including transient-enhanced technique for fast dynamic voltage scaling (DVS) and load-transient response in RF applications. The proposed ACOT control achieves high performance in DVS tracking response to shorten up-tracking time and down-tracking time. Moreover, the high bandwidth transient-enhanced technique in ACOT control improves load-transient response suffering from low bandwidth compensation loop. In addition, the proposed buck converter operates at 2.5 MHz for high power density and 90.1% peak efficiency. This brief is implemented by TSMC 0.18 μm 1P6M CMOS technology with a chip area 1.81 mm2. Measurement results achieve that the output voltage have both 0.6 μs and 0.6 μs recovery time in 600 mA step-up load and 600 mA step-down load, respectively. For 0.6 V step, the output voltage have both 2 μs in up-tracking time and down-tracking time. ? 2004-2012 IEEE.Bandwidth; Power quality; Transient analysis; Voltage scaling; Buck converters; CMOS technology; Constant on time; DC-DC buck converter; High power density; Load transient response; RF applications; Tracking response; DC-DC converters[SDGs]SDG7journal article10.1109/TCSII.2019.29153772-s2.0-85080895668