A 1.9 μW transient-enhanced low-dropout regulator with voltage-spike suppression
Refereed conference paper presented and published in conference proceedings

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AbstractA low-voltage low-dropout regulator (LDO) with voltage-spike suppression is presented in this paper. The proposed LDO is formed by multiple gain stages to improve the loop gain and loop bandwidth simultaneously. The LDO is compensated by a zero generated by the equivalent series resistance (ESR) of the output capacitor, as well as a zero created by the high-pass feedback network. Moreover, the structure contains a capacitive-coupling push-pull stage controlled by a voltage comparator to improve slew rate at the gate of the power transistor in order to suppress the output voltage spike without increasing the bias current. The proposed LDO is implemented by a 0.35-μm CMOS technology (VTHN ≈ 0.5 V and VTHP ≈ -0.65 V). The active area of the chip is 310 μm × 1010 μm. The minimum operating input voltage is 1 V and the preset output voltage is 0.9 V, with quiescent current of 1.9 μA. Measured maximum output current is 91 mA. Load transient measurement shows the voltage spike can be completely suppressed. Copyright © 2010 American Scientific Publishers All rights reserved.
All Author(s) ListLeung K.N., Cheung F.K.M., Ho M., Poon H.C., Or P.Y.
Volume Number6
Issue Number1
PublisherAmerican Scientific Publishers
Place of PublicationUnited States
Pages126 - 132
LanguagesEnglish-United Kingdom
KeywordsLow-Dropout Regulator, Power Management, Voltage Spike

Last updated on 2021-19-09 at 23:43