带自适应TON扩展器的AOT降压变换器在4A负载暂态下实现2.5µs的稳定时间

2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA) Pub Date : 2022-10-28 DOI:10.1109/ICTA56932.2022.9963029

Zhuang Zhang, Hanyu Shi, Danzhu Lu, Peng Cao, Zhiliang Hong

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引用次数: 0

摘要

提出了一种开关频率恒定、瞬态响应快速的自适应导通降压变换器。锁频环(FLL)用于实现恒定的开关频率。on-time (TON)由TON扩展器调节，实现快速瞬态响应。提出的AOT降压变换器采用0.18µm CMOS工艺实现。仿真结果表明，在各种负载条件下，开关频率固定在IMHz，在4A负载暂态下输出电压欠冲和稳定时间分别仅为50m V和2.5µs。

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An AOT Buck Converter with Adaptive TON Extender Achieving 2.5µs Settling Time in 4A Load Transient

An adaptive on-time (AOT) buck converter with constant switching frequency and fast transient response is presented. A frequency-locked loop (FLL) is used to achieve constant switching frequency. The on-time (TON) is adjusted by a TON extender to achieve fast transient response. The proposed AOT buck converter is implemented in 0.18µm CMOS process. The simulation results show that the switching frequency is fixed at IMHz under various load condition and the output voltage undershoot and settling time are only 50m V and 2.5µs, respectively during 4A load transient.

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2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

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