Product category: Power Supply ICs and Controllers
News Release from: Intersil | Subject: ISL6131 and ISL6132
Edited by the Electronicstalk Editorial Team on 26 September 2003
Supervisors keep track
of multiple voltages
Two new tiny near-chip-scale-packaged voltage supervisory ICs accurately monitor and report on voltage conditions for up to four voltage sources above 0.7V
The supervisory ICs significantly ease the job of system designers by integrating monitoring and reporting functions, otherwise requiring dozens of discrete components, into a single compact package. The ISL6131 and ISL6132 are designed for a wide range of applications that include voltage bus monitoring for DSPs and processors found in embedded control systems, graphics cards, intelligent instruments, network equipment, portable devices, set-top boxes and telecommunications systems.
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Voltage monitoring is an essential function necessary to monitor the health and performance of systems that depend on tightly regulated power supplies.
The ISL6131 is an undervoltage four-supply supervisor whereas the ISL6132 is a two-voltage supervisor monitoring both for undervoltage and overvoltage conditions.
Both ICs feature four external resistor-programmable voltage-monitoring inputs each with a related status output that individually reports the related monitor input condition.
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In addition there is a power good reporting pin that switches to a high state when the status outputs are in their correct state.
An approximate 150ms delay ensures that the monitored supply is stable before status and power good are released to go high.
The power good and status outputs are open-drain to allow ORing of the signals and interfacing to a wide range of logic levels.
Status and power good outputs are guaranteed to be valid with IC bias lower than 1V, eliminating concern about status and power good outputs during IC power up and down.
In addition, the voltage-monitoring inputs are designed to ignore momentary transients on the monitored supplies.
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