An extemal-capacitor-less low-dropout regulator with less than −36dB PSRR at all frequencies from 10kHz to 1GHz using an adaptive supply-ripple cancellation technique to the body-gate | IEEE Conference Publication | IEEE Xplore
Scheduled Maintenance: On Monday, 30 June, IEEE Xplore will undergo scheduled maintenance from 1:00-2:00 PM ET (1800-1900 UTC).
On Tuesday, 1 July, IEEE Xplore will undergo scheduled maintenance from 1:00-5:00 PM ET (1800-2200 UTC).
During these times, there may be intermittent impact on performance. We apologize for any inconvenience.

An extemal-capacitor-less low-dropout regulator with less than −36dB PSRR at all frequencies from 10kHz to 1GHz using an adaptive supply-ripple cancellation technique to the body-gate


Abstract:

An external capacitor-less low-dropout regulator (LDO) that provides high power-supply rejection ratio (PSRR) at all low-to-high frequencies was presented. The LDO was de...Show More

Abstract:

An external capacitor-less low-dropout regulator (LDO) that provides high power-supply rejection ratio (PSRR) at all low-to-high frequencies was presented. The LDO was designed to have the dominant pole, ωD, at the gate of the passtransistor, VG, to secure stability without an external capacitor, even when the load current was large. Using the proposed adaptive supply-ripple cancellation (ASRC) technique, where the ripples copied from the supply are injected adaptively to the body-gate, the PSRR-hump of conventional LDOs with ωD at VG can be suppressed significantly. Since the ASRC continues to adjust the magnitude of the injecting ripples, the LDO of this work is able to maintain high PSRRs, irrespective of the amount of the load current, IL, or the dropout voltage, VDO. The proposed LDO was fabricated in a 65-nm CMOS process, and it had an input voltage of 1.2V. When having a 240-pF load capacitor, the measured PSRRs were less than -36dB at all frequencies from 10kHz to 1GHz, despite changes in IL and VDO. The active area was 0.087mm2 including the 240-pF load capacitor, and the total power consumption was 360μW.
Date of Conference: 30 April 2017 - 03 May 2017
Date Added to IEEE Xplore: 27 July 2017
ISBN Information:
Electronic ISSN: 2152-3630
Conference Location: Austin, TX, USA

Contact IEEE to Subscribe

References

References is not available for this document.