Title :
An output-capacitorless linear regulator for integrated portable power solutions
Author :
Day, Judy ; Lie, D.Y.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Tech Univ., Lubbock, TX, USA
Abstract :
This paper proposes a linear regulator that offers a very fast transient response of less than 150ns for a load step with a 100ns rise time. The voltage regulator is designed so that no output capacitor is needed to save die area and system cost. Total on-chip capacitance is a mere 3pF for this design. It also operates at very high power efficiency with only a 39μA quiescent current. This design can be ideal for portable applications powered by a Li-ion battery with a small to moderate digital core, such as a power management IC for cellular phones. The process used in this work is a mature 0.35μm BiCMOS process commonly employed for power management devices by Texas Instruments.
Keywords :
BiCMOS analogue integrated circuits; integrated circuit design; lithium; mobile handsets; secondary cells; transient response; voltage regulators; BiCMOS process; Texas Instruments; capacitance 3 pF; cellular phones; current 39 muA; integrated portable power solutions; lithium ion battery; on-chip capacitance; output-capacitorless linear regulator; power management devices; quiescent current; size 0.35 mum; time 100 ns; very-fast transient response; voltage regulator; Capacitor-less; low-dropout regulator (LDO); transient response;
Conference_Titel :
Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-61284-856-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2011.6026366
