Title :
Design of a dynamic frequency compensation low dropout voltage regulator with buffer impedance attenuation
Author :
Peng, Zhenyu ; Lv, Changzhi ; She, Shuojie
Author_Institution :
Reliability Phys. Lab., Beijing Univ. of Technol., Beijing, China
Abstract :
This paper presents a low-drop (LDO) linear regulator with buffer impedance attenuation (BIA) for frequency compensation. This novel proposed LDO take advantage of the dynamically-biased shunt feedback in the buffer stage, which could lower its output resistance for driving the pass device to achieve fast response. Implemented in 0.35μm CMOS process, the LDO dissipates 184μA quiescent current and is able to deliver up to 100mA load current. With a 2.3μF output capacitance, the maximum transient-output variation is 25mV with full-load step change of 100mA. The proposed circuit will find application in the battery-powered portable devices.
Keywords :
CMOS integrated circuits; buffer circuits; voltage regulators; BIA; CMOS process; LDO; battery-powered portable device; buffer impedance attenuation; capacitance 2.3 muF; current 100 mA; current 184 muA; dynamic frequency compensation low dropout voltage regulator design; dynamically-biased shunt feedback; frequency compensation; low-drop linear regulator; size 0.35 mum; transient-output variation; voltage 25 mV; Capacitance; Impedance; Regulators; Resistance; Stability analysis; Transistors; Voltage control; BIA; LDO; pass device; shunt feedback;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4577-1414-6
DOI :
10.1109/CECNet.2012.6201453
