Low-Dropout Linear Regulator (LDO) Application Tutorial

By: Reno Rossetti

Abstract: LDOs find a spot in virtually every modern electronic device. The result is a rich range of devices fitting the most diverse applications. In this tutorial we review four major classes of applications:-\tLow Noise, High PSRR LDOs for Wired and Wireless Communications-\tLow Power, Small Size LDOs for Portable Equipment-\tHigh Voltage Withstand for Industrial and Automotive Applications -\tHigh Power LDOs for Digital Core Supply.We discuss the challenges of each application class and offer solutions with the help of specific LDO examples.