GENERAL DESCRIPTION
●The ADM1085/ADM1086/ADM1087/ADM1088 are simple sequencing circuits that provide a time delay between the enabling of voltage regulators and/ordc-dc converters atpower upin multiple supply systems. When the output voltage of the first power module reaches a preset threshold,atime delayis initiated before an enable signal allows subsequent regulators to power up. Any number ofthese devices can be cascaded with regulators toallow sequencing ofmultiple power supplies.
●FEATURES
●Provide programmable time delays between enable signals
●Can be cascadedwith power modules for multiple supply sequencing
●Power supply monitoring from 0.6 V Output stages:
● High voltage (up to 22 V) open-drain output (ADM1085/ADM1087)
● Push-pull output (ADM1086/ADM1088)
●Capacitor-adjustable time delays
●High voltage (up to 22 V) Enable and VINinputs
●Low power consumption (15 µA)
●Specified over –40°C to +125°Ctemperature range
●6-leadSC70package
●APPLICATIONS
●Desktop/notebook computers,servers
●Low power portable equipment
●Routers
●Base stations
●Line cards
●Graphics cards
