A programmable multi-output technique in LDO regulator for multi-reference SAR ADC application. Issue 3 (4th March 2017)

• Record Type: Journal Article
• Authors: Tong, Xingyuan; Sun, Tiantian
• Is Part Of: International journal of electronics. Volume 104:Issue 3(2017)
• Page Start: 528
• Page End: 538
• Publication Date: 2017-03-04
• Subjects: Regulator -- low drop-out -- output-adjustable -- system-on-chip -- CMOS integrated circuits; Electronics -- Periodicals; Electronic control -- Periodicals; 621.381
• DOI: 10.1080/00207217.2016.1218069
• Languages: English
• ISSNs: 0020-7217

Abstract

ABSTRACT: A multi-output and high-precision output-tuning technique in a low-dropout regulator (LDO) for multi-reference low-power SAR ADC is proposed in this article. A programmable resistor string is utilised for multi-output, and a tuneable resistor ladder is introduced in the feedback network for high-precision LDO output control. The applicability and superiority of this proposed approach are verified by the design of a 65 nm CMOS LDO with programmable output. The design results show that the LDO output ranges from 0.4 to 1.2 V with 0.2 V/step, and the output voltage can be precisely tuned by 0.05 V/step within a range of 0.8–1.15 V. The line regulation of this LDO is about 0.27 mV/V. The multi-output ability enables the LDO to drive five light loads simultaneously, and the high-precision tuning ability can effectively overcome the output errors caused by power supply variation, temperature drift and other non-ideal factors.