Title :
A 4µA quiescent current output-capacitor-free low-dropout regulator with fully differential input stage
Author :
Min Tan ; Chenchang Zhan ; Wing-Hung Ki
Author_Institution :
Hong Kong Univ. of Sci. & Technol., Hong Kong, China
Abstract :
In this work, an output-capacitor-free (OCF) low-dropout regulator (LDR) employing fully differential input stage is proposed. By using a fully differential input stage, the proposed OCF LDR is able to improve the transient responses without the help of any additional transient boosting circuitry. This design is stabilized with a 0.37pF compensation capacitor. It is able to provide a maximum load current of 100mA at 0.7V to 1.2V supply with less than 200mV dropout voltage. Implemented in 0.13μm CMOS technology, it consumes a quiescent current of 4μA and occupies an active area of 0.0132mm2.
Keywords :
CMOS integrated circuits; capacitors; controllers; transient response; CMOS technology; capacitance 0.37 pF; compensation capacitor; current 100 mA; current 4 muA; fully differential input stage; quiescent current output-capacitor-free low-dropout regulator; size 0.13 mum; transient boosting circuitry; transient responses; voltage 0.7 V to 1.2 V; Boosting; CMOS integrated circuits; Capacitors; Circuit stability; Regulators; Transient analysis; Transistors; Low-dropout regulator; Miller compensation; cascode Miller compensation; fully differential input; minimum supply voltage;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865670
