DocumentCode :
50284
Title :
Single-Inductor Quad-Output Switching Converter With Priority-Scheduled Program for Fast Transient Response and Unlimited Load Range in 40 nm CMOS Technology
Author :
Wei-Chung Chen ; Yi-Ping Su ; Tzu-Chi Huang ; Tsu-Wei Tsai ; Ruei-Hong Peng ; Kuei-Liang Lin ; Ke-Horng Chen ; Ying-Hsi Lin ; Chao-Cheng Lee ; Shian-Ru Lin ; Tsung-Yen Tsai
Author_Institution :
Inst. of ElectricalControl Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Volume :
50
Issue :
7
fYear :
2015
fDate :
Jul-15
Firstpage :
1525
Lastpage :
1539
Abstract :
System-on-a-chip (SoC) applications require multiple power supply voltages with the features of low noise for analog circuits and high efficiency for digital circuits. Thus, this paper proposes the priority-scheduled program (PSP) for the single-inductor quad-output (SIQO) switching converter. This technique manages energy delivery to multiple outputs, facilitates fast transient response, and reduces cross-regulation simultaneously. Moreover, a level bypass detector (LBD) is used to overcome the limitation of significant loading differences among quad outputs in conventional designs because the PSP technique cantransfer additional energy to low-priority outputs to avoid overshoot voltage at high-priority outputs. Furthermore, voltage disturbance can be filtered out using two additional low-dropout regulators that operate as buffers cascaded at two low-priority outputs. Therefore, the SIQO converter that is fabricated in 40 nm CMOS technology satisfies the power requirements in portable electronics given its low cross-regulation of 0.2%, fast transient response of 15 μs, and an output voltage ripple that is smaller than 30 mV.
Keywords :
CMOS digital integrated circuits; switching convertors; system-on-chip; transient response; CMOS technology; LBD; PSP technique; SIQO switching converter; SoC application; analog circuits; cross-regulation reduction; digital circuits; energy delivery; fast transient response; level bypass detector; low-dropout regulators; low-priority outputs; multiple-power supply voltages; output voltage ripple; portable electronics; priority-scheduled program; single-inductor quad-output switching converter; size 40 nm; system-on-a-chip application; time 15 mus; voltage disturbance; Inductors; Loading; Regulators; Switches; Transient analysis; Transient response; Voltage control; Cross-regulation; fast transient; level bypass detector (LBD); priority-scheduled program (PSP); single-inductor quad-output (SIQO);
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2015.2422071
Filename :
7098440
Link To Document :
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