Highly stable low-dropout linear regulator with temperature compensation
Yan Xiao-lang · Journal of Zhejiang University(Engineering Science) · 2007
A highly stable low-dropout(LDO) regulator operated in an extended temperature range of-40 ℃ to 130 ℃ was presented by utilizing the design method of leakage current compensation in high temperature.The LDO regulator with a novel dynamic Miller frequency compensation structure provides high stability at any load,so the LDO regulator is unconditional stability.The proposed LDO regulator was implemented by using 0.5 μm complementary metal-oxide semiconductor(CMOS) technology of CSMC Technologies Corporation.Simulation and experiment showed that the temperature coefficient for output voltage was only 2×10-5/℃ over the range of-40 ℃ to 130 ℃,and the regulator provided full load transient response of less than 50 mV overshoots and undershoots and less than 50 μs setting time.The power-supply rejection ratio at 1 kHz was-50 dB.The typical dropout was 170 mV at 150 mA loading.