Author/Authors :
Abiri، Ebrahim نويسنده Electrical and Electronic Department of Shiraz University of Technology , , SALEHI OMRAN، Mohammad Reza نويسنده Associate Professor of Pediatric Neurology, Non-Communicable Pediatric Research Center, Babol University of Medical Sciences,Babol, Iran , , Mohammadalinejadi، Sara نويسنده Department of Electrical Engineering, Shiraz university of Technology, Modarres Blvd, Shiraz, Iran ,
Abstract :
A low dropout voltage regulator with small output voltage variations and the ability of wide load current range support is proposed in this paper. In this LDO structure, a recycling folded cascode operational transconductance amplifier is used as an error amplifier, which has high transconductance and therefore high power efficiency. The designed LDO is simulated in 0.18 ?m CMOS standard technology and has small output voltage variations about 48 mV for load current in the range of 0-150 mA. Simulation results show a favorable transient response behavior with 4.2 ?s rise time and 160mV dropout voltage for current changing in the desirable range. It is shown that the LDO structure can support 0-150 mA load current range with reasonable output voltage variations. In addition, with the smaller load current ranges, the dropout voltage will be higher and the output voltage variations will be smaller.
