Title :
A Transient-Enhanced 20μA-Quiescent 200mA-Load Low-Dropout Regulator With Buffer Impedance Attenuation
Author :
Al-Shyoukh, Mohammad ; Perez, Raul A. ; Lee, Hoi
Author_Institution :
Mixed Signal Automotive Group, Texas Instrum. Inc., Dallas, TX
Abstract :
This paper demonstrates a 200mA low-dropout regulator (LDO) for portable applications. Buffer impedance attenuation is developed to realize a single-pole loop response through shunt feedback. The LDO is thus unconditionally stable without using an ESR zero and output undershoots and overshoots are minimized during load transients. Implemented in 0.35μm twin-well CMOS, the LDO only dissipates 20μA quiescent current. With a 1μF output capacitor, the maximum transient-output variation is 54mV with full-load step change of 200mA.
Keywords :
CMOS analogue integrated circuits; feedback; voltage regulators; 0.35 micron; 1 muF; 20 muA; 200 mA; buffer impedance attenuation; low-dropout regulator; portable applications; quiescent load; shunt feedback; single-pole loop; transient-enhanced regulator; twin-well CMOS; Attenuation; Bandwidth; Capacitors; Energy consumption; Impedance; Paramagnetic resonance; Regulators; Stability; USA Councils; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320835
