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GENERAL DESCRIPTION

The ADM1186-1 and ADM1186-2 are integrated, four-channel voltage monitoring and sequencing devices. A 2.7 V to 5.5 V power supply is required on the VCC pin for power.

Four precision comparators, VIN1 to VIN4, monitor four voltage rails. All four comparators share a 0.6 V reference and have a worst-case accuracy of 0.8. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the undervoltage (UV) trip points for the monitored supply rails.

FEATURES

Powered from 2.7 V to 5.5 V on the VCC pin

Monitors four supplies via 0.8 accurate comparators

Digital core supports up and down supply sequencing

Multiple devices can be cascaded (ADM1186-1)

Four inputs can be programmed to monitor different voltage

levels with resistor dividers

Capacitor programmable supply sequence time delays

and a timeout delay to 5 accuracy at 25°C

Four open-drain enable outputs

Open-drain power-good output

Open-drain sequence complete pin and bidirectional

open-drain fault pin (ADM1186-1 only)

APPLICATIONS

Monitor and alarm functions

Up and down power supply sequencing

Telecommunication and data communication equipment

PCs, servers, and notebook PCs