Level Shifters and DCVSL for a Low-Voltage CMOS 4.2-V Buck Converter

Author

Rocha, Jose F da ; Santos, Marcelino B dos ; Costa, Jose M Dores ; Lima, Floriberto A.

Author_Institution

Electr., Telecommun. & Comput. Eng. Dept., Inst. Super. de Eng. de Lisboa, Lisbon

Volume

55

Issue

9

fYear

2008

Firstpage

3315

Lastpage

3323

Abstract

In this paper, high-voltage (HV)-tolerant level shifters with combinational functionality are proposed based on differential cascode voltage switch logic (DCVSL). These level shifters are tolerant to supply voltages higher than the process limit for individual CMOS transistors. The proposed HV DCVSL level shifters are particularly useful when it is mandatory to constrain the output using a logic function during out of the normal mode periods (power-up, power-down, reset, etc.). These HV-tolerant logic circuits were used in the power block of a buck converter designed in a standard 3.3-V 0.13-mum CMOS process, powered by an input voltage range from 2.7 to 4.2 V. Simulation and experimental results of the buck are analyzed, and the topology is evaluated.

Keywords

CMOS logic circuits; MOSFET; power convertors; power integrated circuits; CMOS buck converter; CMOS transistors; HV-DCVSL; HV-tolerant logic circuits; differential cascode voltage switch logic level shifters; voltage 4.2 V; CMOS integrated circuits; DC-DC power conversion; High-voltage techniques; dc–dc power conversion; high-voltage (HV) techniques;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.927974

Filename

4558157