A 0.13-mu m CMOS Low-Power Capacitor-Less LDO Regulator Using Bulk-Modulation Technique

作者：Keikhosravy Kamyar^*; Mirabbasi Shahriar

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2014, 61(11): 3105-3114.

DOI：10.1109/TCSI.2014.2334831

• Bulk modulation technique
• capacitor-less LDO
• CMOS LDO
• low-drop-out voltage regulator
• low-power

In this paper, a bulk-modulation technique is introduced for improving the performance of low-drop-out (LDO) voltage regulators. Compared to conventional LDO voltage regulators, the proposed circuit achieves improved accuracy, stability, and output load current capability. The technique is particularly suited for low-power applications such as biomedical implants and portable devices. A proof-of-concept prototype is designed and fabricated in 0.13-mu m CMOS, to illustrate the enhancement that can be achieved by applying this technique. The proposed enhanced LDO regulator which is based on conventional LDO regulators is able to delivers up to 5 mA of load current while providing a 1 V (similar to 1.5% load regulation) drawing 99.0 mu A from a 1.2 V supply. Measurement results confirm that as compared to conventional LDOs, the proposed circuit offers better stability as well as %75 improvement in the load current delivery and similar to 10x faster recovery time for no-load to and from full-load transitions.

• 出版日期2014-11