Title :
Load regulation cancellation based on adaptive body bias for STC-LDOs
Author :
Shi Bu ; Ho, Marco ; Ka Nang Leung ; Jianping Guo
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
A technique of load regulation cancellation based on adaptive body bias (ABB) for single-transistor-control low-dropout regulators (STC-LDOs) is presented. The proposed technique is easy to implement and can effectively improve the dc accuracy by 87% for an output current range of 1 to 100 mA, without having to use a high-gain error amplifier. Simulations using a standard 0.18-μm process show that the load regulation is as small as 7 μV/mA The current efficiency drop due to the proposed technique is below 0.0077% and the whole circuit remains a current efficiency of over 99.985% Stability and transient response are not sacrificed.
Keywords :
load regulation; system-on-chip; transient response; ABB; DC accuracy; SoC STC-LDO; adaptive body bias; current 1 mA to 100 mA; current efficiency drop; load regulation cancellation; output current range; single-transistor-control low-dropout regulators; size 0.18 mum; system-on-chip; transient response; Accuracy; Circuit stability; Regulators; Sensors; System-on-chip; Transistors; Voltage control;
Conference_Titel :
Circuits and Systems (APCCAS), 2014 IEEE Asia Pacific Conference on
Conference_Location :
Ishigaki
DOI :
10.1109/APCCAS.2014.7032729
