An external capacitor-less low drop-out regulator with superior PSR and fast transient response

Author

Ganta, Saikrishna ; Chang-Joon Park ; Gitzel, Daniel ; Rivera, R. ; Silva-Martinez, Jose

Author_Institution

Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA

fYear

2013

fDate

4-7 Aug. 2013

Firstpage

137

Lastpage

140

Abstract

In this paper, an external capacitor-less low drop-out (LDO) voltage regulator with superior power supply rejection (PSR) and small transient ripple is described. The proposed LDO has the advantages of wide-band PSR and fast transient response while consuming only 18μA of quiescent current. Simulation results show that the LDO designed in a mainstream 0.18μm CMOS technology presents a PSR better than -55dB up to 1MHz when loaded by a 100pF capacitor. The peak-to-peak undershoots and overshoots are less than 75mV when load current pulses from 0 to 50mA with 1μs rise/fall times. Load regulation is around 30mV/mA and output voltage deflection is under 75mV when sweeping the load current in the range 0-50mA.

Keywords

CMOS integrated circuits; transients; voltage regulators; CMOS technology; capacitance 100 pF; current 0 mA to 50 mA; external capacitor-less low drop-out regulator; fast transient response; size 0.18 m; small transient ripple; superior PSR response; superior power supply rejection;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on

Conference_Location

Columbus, OH

ISSN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2013.6674604

Filename

6674604