Method and apparatus for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs)

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United States of America Patent

PATENT NO 11493945
SERIAL NO

16692389

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Abstract

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An apparatus and method are provided for mitigating performance degradation in digital low-dropout voltage regulators (DLDOs) caused by the effects of aging on the power transistors of the DLDO, such as by the effects of negative bias temperature instability (NBTI)-induced aging, for example. The apparatus comprises a shift register for use in a DLDO that is configured to activate and deactivate power transistors of the DLDO to evenly distribute electrical stress among the transistors in a way that mitigates performance degradation of the DLDO under various load current conditions. In addition, the shift register and methodology can be implemented in such a way that nearly no extra power and area overhead are consumed.

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REGENTS OF THE UNIVERSITY OF MINNESOTA600 MCNAMARA ALUMNI CENTER 200 OAK STREET SE MINNEAPOLIS MN 55455-2020

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Köse, Selçuk Tampa, US 3 6
Karpuzcu, Ulya R Minneapolis, US 4 11
Khatamifard, S Karen Los Angeles, US 3 6
Wang, Longfei Tampa, US 38 85

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