UCD9080

8路电源时序器和监听器 8-CHANNEL POWER SUPPLY SEQUENCER AND MONITOR

The power-supply sequencer controls the enable sequence of up to eight independent voltage rails and provides four general-purpose digital outputs. The device operates from a 3.3-V supply, provides 3.2-mV resolution of voltage rails, and requires no external memory or clock. The UCD9080 monitors the voltage rails independently at more than a 20-kHz rate and has a high degree of rail sequence and rail error-response configurability. The sequencing of rails can be based on timed events or on timed events in conjunction with other rails achieving regulation or a voltage threshold. In addition, each rail is monitored for undervoltage and overvoltage glitches and thresholds. Each rail the UCD9080 monitors can be configured to shut down a user-defined set of other rails, and alarm conditions are monitored on a per-rail basis.

Figure 1 shows the UCD9080 power-supply sequencer in a typical application.

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Single Supply Voltage: 3.3 V

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Low Power Consumption

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Sequences and Monitors up to Eight Voltage Rails

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Rail Voltages Sampled Every 50 µs With 3.2-mV Resolution

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Four Configurable Digital Outputs for Power-On Reset and Other Functions

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Configurable Rail-Enable Output Polarity

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Flexible Rail Sequencing: Timeline ms, Parent Rail Regulation Window, Parent Rail Achieving Defined Threshold

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Under- and Overvoltage Thresholds: Settable Per-Rail

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Regulation Expiration Time: Settable Per-Rail

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Flexible Rail Shutdown: Parent Rail Shutdown Can Shut Down Child Rails, Independent Rail Configuration

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Per-Rail Alarm Conditions, With Timestamp: Under- and Overvoltage Glitch, Sustained Under- and/or Overvoltage, Rail Did Not Start

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I2C Interface for Configuration and Monitoring

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Microsoft™ Windows™ GUI for Configuration and Monitoring

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APPLICA ONS

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Telecommunications Switches

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Servers

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Networking Equipment

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Test Equipment

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Any System Requiring Sequencing of Multiple Voltage Rails

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