Title :
Wide-Loading-Range Fully Integrated LDR With a Power-Supply Ripple Injection Filter
Author :
Ho, Edward N Y ; Mok, Philip K T
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
fDate :
6/1/2012 12:00:00 AM
Abstract :
A low-dropout regulator for on-chip application with a power-supply rejection (PSR) boosting filter circuit for enhancing supply noise rejection at middle-to-high frequency over a wide loading range is presented in this brief. The idea has been analytically modeled and experimentally verified with a standard 0.13- μm CMOS process. The on-chip compensation capacitance is 1 pF. For the PSR filter design, the total on-chip capacitance is 20 pF. From the experimental results, the implemented regulator can operate with supply voltage of 1.2 V with nominal dropout voltage of 0.2 V at maximum load of 50 mA and IQ of 37.32 μA.
Keywords :
CMOS analogue integrated circuits; interference suppression; power filters; power supply circuits; voltage regulators; CMOS process; PS boosting filter circuit; PSR filter design; capacitance 1 pF; capacitance 20 pF; current 37.32 muA; low-dropout voltage regulator; on-chip compensation capacitance; power-supply ripple injection filter; size 0.13 mum; supply noise rejection; total on-chip capacitance; voltage 0.2 V; voltage 1.2 V; wide-loading-range fully integrated LDR; Capacitance; Loading; Power MOSFET; Power transistors; Regulators; Transfer functions; Analog circuits; LDO voltage regulators; capacitorless low dropout (LDO); dc–dc regulator;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2012.2195061
