Title :
Structural Design of a CMOS Full Low Dropout Voltage Regulator
Author :
Filanovsky, I.M. ; Reja, Mahbub ; Ivanov, V.
Author_Institution :
Univ. of Alberta, Edmonton
Abstract :
The paper describes structural design of a full (complete) low dropout (LDO) voltage regulator. This LDO is using the following basic subcircuits: bandgap reference (BGR), folded-cascode current operational amplifier (COA), and bias circuit. The regulator is divided in three main blocks, namely, a sub-regulator generating power supply voltage for the BGR, a scaling amplifier providing convenient reference voltage for the LDO, and the LDO itself providing the required output voltage. Each block is consisting of a COA, pass transistor and resistor and represents a dedicated feedback loop. The regulator does not require any on-chip compensation capacitors, and ensures stable operation for a very wide range of capacitive loads. The complete LDO regulator is realized in standard digital 0.13-¿m CMOS process for the output voltage of 1.22 V from 1.8-3.3 V power supply.
Keywords :
CMOS integrated circuits; circuit feedback; operational amplifiers; power supply circuits; reference circuits; voltage regulators; CMOS full low dropout voltage regulator; bandgap reference; bias circuit; capacitive loads; feedback loop; folded-cascode current operational amplifier; on-chip compensation capacitors; output voltage; pass resistor; pass transistor; reference voltage; scaling amplifier; structural design; sub-regulator generating power supply voltage; subcircuits; Circuits; Feedback loop; Low voltage; Operational amplifiers; Photonic band gap; Power amplifiers; Power generation; Power supplies; Regulators; Resistors;
Conference_Titel :
Electronics, Circuits and Systems, 2007. ICECS 2007. 14th IEEE International Conference on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-1377-5
Electronic_ISBN :
978-1-4244-1378-2
DOI :
10.1109/ICECS.2007.4511103
