A 25mA CMOS LDO with -85dB PSRR at 2.5MHz
Refereed conference paper presented and published in conference proceedings


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AbstractA CMOS low-dropout regulator (LDO) with high power-supply rejection ratio (PSRR) achieved by the proposed supply ripple feed-forward path is presented in this paper. The LDO is simple with two additional low-pass filters included. No extra power is consumed when comparing to the traditional design. The proposed LDO is implemented in 0.18-μ m CMOS technology. It occupies active area of 0.042 mm2. With the proposed embedded supply ripple feed-forward path, in the maximum loading of 25 mA, it achieves PSRR of -85 dB at 2.5 MHz and PSRR better than -55 dB when frequency is below 5 MHz with a 4.7-μF output capacitor. The measured quiescent current is 15 μA only. The overshoot and undershoot voltages are less than 40 mV when loading changes between 1 mA and 25 mA within 40 ns. The LDO achieves line and load regulations of 3 mV/V and 50 μV/mA, respectively. © 2013 IEEE.
All Author(s) ListGuo J., Leung K.N.
Name of Conference2013 9th IEEE Asian Solid-State Circuits Conference, A-SSCC 2013
Start Date of Conference11/11/2013
End Date of Conference13/11/2013
Place of ConferenceSingapore
Country/Region of ConferenceSingapore
Detailed descriptionorganized by Asian Solid-State Circuits Conference,
Year2013
Month12
Day1
Pages381 - 384
ISBN9781479902781
LanguagesEnglish-United Kingdom
KeywordsEmbedded feed-forward path, Low-dropout regulator, Power-supply rejection ratio, Supply ripple cancellation, Transient response

Last updated on 2021-17-09 at 23:43