A 1.5W 10V-output Class-D amplifier using a boosted supply from a single 3.3V input in standard 1.8V/3.3V 0.18μm CMOS

Author

Serneels, Bert ; Geukens, Eldert ; De Muer, Bram ; Piessens, Tim

Author_Institution

ICsense, Leuven, Belgium

fYear

2012

Firstpage

94

Lastpage

96

Abstract

In this paper, a complete high-voltage concept is presented, designed in a low- voltage CMOS technology, using only the nominal voltage as input. A test chip has been developed with an inductive DC-DC converter generating a 10V output from a single 3.3V input in a standard 1.8V/3.3V 0.18μm CMOS technology. The generated 10V serves as a supply for an on-chip Class-D output stage, able to deliver 1.5W. The 10V is protected by a custom high-voltage ESD clamp. Reliable operation of the low-voltage devices is guaranteed, including process, power supply and temperature variations, without the need for special startup circuits.

Keywords

CMOS analogue integrated circuits; DC-DC power convertors; electrostatic discharge; low-power electronics; power amplifiers; class-D amplifier; custom high-voltage ESD clamp; high-voltage concept; inductive DC-DC converter; low-voltage CMOS technology; low-voltage device; nominal voltage; on-chip class-D output stage; power 1.5 W; power supply; reliable operation; size 0.18 mum; temperature variation; test chip; voltage 1.8 V; voltage 10 V; voltage 3.3 V; CMOS integrated circuits; CMOS technology; Clamps; Electrostatic discharges; Rails; Reliability; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2012 IEEE International

Conference_Location

San Francisco, CA

ISSN

0193-6530

Print_ISBN

978-1-4673-0376-7

Type

conf

DOI

10.1109/ISSCC.2012.6176890

Filename

6176890