Open AccessAn Adaptive Voltage Scaling Buck Converter with Preset Circuit
Author(s) -
Luo Ping,
Wang Dongjun,
Peng Xuanlin
Publication year - 2019
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2019.01.007
Subject(s) - scaling , voltage , control theory (sociology) , loop (graph theory) , buck converter , pulse width modulation , frequency scaling , cmos , computer science , physics , mathematics , optoelectronics , control (management) , geometry , quantum mechanics , combinatorics , artificial intelligence
An Adaptive voltage scaling (AVS) buck converter with Preset circuit (P‐AVS), which can adaptively scale the output voltage fast, is presented. The voltage scaling loop in the proposed Pulse width modulation (PWM) buck with P‐AVS is divided into coarse scaling loop and fine scaling loop, which can regulate the reference voltage adaptively according to load status. The coarse scaling loop can set quickly a coarse value of reference voltage according to the operation frequency of the load by a preset block, and the fine scaling loop is designed to scale voltage finely. The proposed P‐AVS buck converter, with 3.3V input and 2MHz switching frequency, is fabricated in a 0.13mm standard CMOS process. The output voltage and the frequency of the load are designed from 0.7V to 1.5V and 30MHz to 120MHz respectively. Compared with a typical AVS buck, the proposed P‐AVS converter can save 17ms scaling up from 0.7V to 1.1V.