Title :
A Capacitor-Less CMOS Active Feedback Low-Dropout Regulator With Slew-Rate Enhancement for Portable On-Chip Application
Author :
Ho, Edward N Y ; Mok, Philip K T
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
A low-dropout regulator for on-chip application with active feedback and a slew-rate enhancement circuit to minimize compensation capacitance and speed up transient response is presented in this brief. The idea has been modeled and experimentally verified in a standard 0.35-??m CMOS process. The total compensation capacitance is 7 pF. From experimental results, the implemented regulator can operate from a supply voltage of 1.8-4.5 V with a minimum dropout voltage of 0.2 V at a maximum 100-mA load and I Q of 20 ??A.
Keywords :
CMOS integrated circuits; circuit feedback; controllers; integrated circuit modelling; active feedback circuit; capacitance 7 pF; capacitor-less CMOS active feedback low-dropout regulator; current 100 mA; current 20 muA; portable on-chip application; size 0.35 mum; slew-rate enhancement circuit; voltage 0.2 V; voltage 1.8 V to 4.5 V; Active feedback; analog circuits; capacitor-less low dropout (LDO); dc–dc regulator; low-dropout (LDO) voltage regulators;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2009.2038630
