A Multi-Voltage Reference Source

Author

Ramos, Filipe G R ; Caldeira, Laércio ; Pimenta, Tales Cleber

Author_Institution

FreeScale, Austin

fYear

2007

fDate

25-28 Sept. 2007

Firstpage

657

Lastpage

662

Abstract

A 3 bits programmable, low drift, high PSRR and high precision voltage reference, optimized to power management (PM) applications, is presented. The topology is based on a high performance bandgap voltage reference applied to a non-inverting amplifier stage, which generates an internal voltage reference of 2.4V, isolated by a buffer and derived by resistor dividers, generating eight selectable output voltages from 0 to 2.1V, chosen by an analog multiplexer. It has been successfully verified in a standard 0.35m CMOS process. The experimental results have confirmed that, for power supply of 3.0V to 3.3V, and -20oC to 80oC temperature range, the programmable output voltage VREF has a worst case precision of plusmn3%.

Keywords

CMOS analogue integrated circuits; amplifiers; dividing circuits; network topology; reference circuits; CMOS process; analog multiplexer; bandgap voltage reference; internal voltage reference; multi-voltage reference source; non-inverting amplifier stage; power management; resistor dividers; size 0.35 mum; temperature -20 C to 80 C; voltage 0 V to 2.1 V; voltage 2.4 V; voltage 3.0 V to 3.3 V; Application specific integrated circuits; Circuit topology; Energy management; Microprocessors; Photonic band gap; Power supplies; Resistors; Temperature dependence; Temperature distribution; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Robotics and Automotive Mechanics Conference, 2007. CERMA 2007

Conference_Location

Morelos

Print_ISBN

978-0-7695-2974-5

Type

conf

DOI

10.1109/CERMA.2007.4367762

Filename

4367762