A 65nm 10MHz single-inductor dual-output switching buck converter with time-multiplexing control

Author

Yang, Miao ; Sun, Weifeng ; Xu, Shen ; Lu, Shengli ; Shi, Longxing

Author_Institution

Nat. ASIC Syst. Eng. Res. Center, Southeast Univ., Nanjing, China

fYear

2011

fDate

25-28 Oct. 2011

Firstpage

870

Lastpage

873

Abstract

A 10MHz switching frequency integrated single-inductor dual-output buck converter with time-multiplexing (TM) control in discontinuous conduction mode (DCM) is proposed. This converter only uses one 0.5uH off-chip inductor and one error amplifier to provide two independent supply voltages (1.2V and 1.8V). Simulation results prove the converter is high efficient and stable. The converter was fabricated using SMIC 65nm digital CMOS process. The output voltages are 1.8V/20mA and 1.2V/30mA, respectively. The peak power efficiency reaches 85.5%.

Keywords

DC-DC power convertors; inductors; switching convertors; current 20 mA; current 30 mA; digital CMOS process; discontinuous conduction mode; efficiency 85.5 percent; error amplifier; frequency 10 MHz; off-chip inductor; single-inductor dual-output switching buck converter; size 65 nm; switching frequency; time-multiplexing control; voltage 1.2 V; voltage 1.8 V; CMOS integrated circuits; Pulse width modulation; Switches; Time frequency analysis; Peak-current control (PCC); TM; single-inductor dual-output (SIDO); single-inductor multiple-output (SIMO);

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC (ASICON), 2011 IEEE 9th International Conference on

Conference_Location

Xiamen

ISSN

2162-7541

Print_ISBN

978-1-61284-192-2

Electronic_ISBN

2162-7541

Type

conf

DOI

10.1109/ASICON.2011.6157343

Filename

6157343