The SmartORTM CMPWR160 combines a Low Dropout Regulator (LDO) with a Power-On Reset (POR) pulse generator, and is intended for Universal Serial Bus (USB) peripherals. To meet the specification requirements of both USB 1.0 and USB 2.0, the CMPWR160 draws a very low quiescent current (35A), and delivers up to 500mA of load current at a fixed 3.3V output. The POR pulse (active LOW) has a typical duration of 30ms after the output has exceeded and stabilized above 2.9V. Thus a new POR pulse is developed each time the regulator power is interrupted and restored, which occurs often on USB buses when cables are connected (or disconnected) by the user. It is not necessary to have a VCC supply for POR to operate, allowing the CMPWR160 to work in Wired-ORed power systems.