TY - JOUR
T1 - Area Efficient High-Performance Digitally Controlled Power Management Unit
AU - Liu, Chih Wei
AU - Chang-Chien, Le Ren
N1 - Funding Information:
Manuscript received November 1, 2018; revised June 1, 2019, October 4, 2019, and January 8, 2020; accepted February 4, 2020. Date of publication March 2, 2020; date of current version November 18, 2020. This work was supported in part by the Taiwan Semiconductor Research Institute under Grant T18-106B-A0023, and in part by the Ministry of Science and Technology of Taiwan under Grant MOST 108-2221-E-006-134-MY2. (Corresponding author: Chih-Wei Liu.) The authors are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (e-mail: w19880708@ hotmail.com; leren@ee.ncku.edu.tw).
Publisher Copyright:
© 1982-2012 IEEE.
PY - 2021/3
Y1 - 2021/3
N2 - Power management unit (PMU) is commonly used to manage power modules to achieve high efficient performance for integrated circuits. Inside the PMU, controllers that belong to different power modules could be pretty much similar. If the discrete feature of the digital control can be gainfully arranged, we can use only one controller to operate all the power modules inside the PMU, which can reduce circuit area and save cost. This article proposes a pipeline concept to realize this idea. To achieve high performance, this article also introduces a phase sequence interchange technique to reduce the cross regulation problem of the single inductor dual outputs converter and an autotuning charge balance algorithm (AT-CBA) to enhance the transient response. The PMU is fabricated in Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 μm CMOS manufacturing process for functional validation. Experimental results show that the pipeline controlled PMU can simultaneously output six voltages with extremely low cross regulation. The proposed AT-CBA also successfully make both buck converter and low-dropout achieve near-optimal transient response in 40 mV/5 μs and 120 mV/1 μs, respectively.
AB - Power management unit (PMU) is commonly used to manage power modules to achieve high efficient performance for integrated circuits. Inside the PMU, controllers that belong to different power modules could be pretty much similar. If the discrete feature of the digital control can be gainfully arranged, we can use only one controller to operate all the power modules inside the PMU, which can reduce circuit area and save cost. This article proposes a pipeline concept to realize this idea. To achieve high performance, this article also introduces a phase sequence interchange technique to reduce the cross regulation problem of the single inductor dual outputs converter and an autotuning charge balance algorithm (AT-CBA) to enhance the transient response. The PMU is fabricated in Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 μm CMOS manufacturing process for functional validation. Experimental results show that the pipeline controlled PMU can simultaneously output six voltages with extremely low cross regulation. The proposed AT-CBA also successfully make both buck converter and low-dropout achieve near-optimal transient response in 40 mV/5 μs and 120 mV/1 μs, respectively.
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U2 - 10.1109/TIE.2020.2975476
DO - 10.1109/TIE.2020.2975476
M3 - Article
AN - SCOPUS:85097378234
VL - 68
SP - 2437
EP - 2446
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
SN - 0278-0046
IS - 3
M1 - 9020012
ER -