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An Eight-Channel Switching-Linear Hybrid Dynamic Regulator with Dual-Supply LDOs for Thermo-Optical Tuning

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posted on 12.10.2021, 03:56 by Siyuan ZhangSiyuan Zhang, min tanmin tan, Xingze Wang
A novel switching-linear hybrid dynamic regulator with dual-supply LDOs for thermo-optical tuning is presented in this brief. Compared with conventional designs, the proposed design leverages the intrinsic dual supplies to extend the operating range of the LDOs, and increases the thermo-optical tuning efficiency by reducing the dropout of the LDOs through dynamic voltage tracking. It can simultaneously regulate eight output channels and track 0.8 Vpp sinusoidal waveforms at different frequencies. Significant efficiency improvement of the proposed design is achieved for envelope signals with a small difference, which is common in thermo-optical tuning. Implemented in 130 nm CMOS process, the proposed design has a total chip area of 0.675 mm2. The proposed design achieves a conversion efficiency of 88% at 1 V output driving a 200 ohms load. Its dynamic efficiency is about 80% when tracking 50 kHz sinusoidal signals.

Funding

National Natural Science Foundation of China, 61904061

Major State Basic Research Development Program of China, 2018YFA0704400

Fundamental Research Funds for the Central Universities, HUST, 2019kfyXKJC037

History

Email Address of Submitting Author

mtan@hust.edu.cn

ORCID of Submitting Author

0000-0002-5531-6198

Submitting Author's Institution

Huazhong University of Science and Technology, Wuhan 430074, China

Submitting Author's Country

China