Title :
A Capacitor-less Low Drop out Voltage Regulator
Author :
Shirahatti, Sunita ; Nandi, Anilkumar ; Priyatamkumar
Author_Institution :
Electron. & Commun., B.V. Bhoomaraddi Coll. of Eng. & Technol., Hubli, India
Abstract :
Low dropout voltage regulators (LDO) use a large external capacitor, in the range of few micro-farads. These external capacitors occupy valuable board space, increase the IC pin count and prohibit System-On-Chip (SoC) solutions. The large external capacitor is replaced with a reasonable InF internal capacitor. The capacitor-less LDO is designed for an output voltage of 1.4V for a given supply voltage 2.2V using Cadence tool, UMC180 PDK in 0.18 μm CMOS technology. The capacitor-less LDO responds within 80ns for a load current change of 0-5 mA consuming 300uA of ground current The Line and Load regulations achieved are 0.3mV and 0.22 mV respectively. The observed overshoot and undershoot voltages are less than 50m V in all process corners. The fast transient loop used has improved line regulation, load regulation and transient response.
Keywords :
CMOS integrated circuits; system-on-chip; transient response; voltage regulators; CMOS technology; Cadence tool; IC pin count; LDO; SoC; UMC180 PDK; capacitor-less low dropout voltage regulator; current 0 mA to 5 mA; line regulation; load current; load regulation; overshoot voltage; size 0.18 mum; system-on-chip; transient response; undershoot voltage; voltage 1.4 V; voltage 2.2 V; CMOS integrated circuits; CMOS technology; Equations; Instruments; Petroleum; Switches; Transient analysis;
Conference_Titel :
Communication Control and Computing Technologies (ICCCCT), 2010 IEEE International Conference on
Conference_Location :
Ramanathapuram
Print_ISBN :
978-1-4244-7769-2
DOI :
10.1109/ICCCCT.2010.5670547
