●The UCD9080 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.
● Single Supply Voltage: 3.3 V
● Low Power Consumption
● Sequences and Monitors up to Eight Voltage Rails
● Rail Voltages Sampled Every 50 µs With 3.2-mV Resolution
● Four Configurable Digital Outputs for Power-On Reset and Other Functions
● Configurable Rail-Enable Output Polarity
● Flexible Rail Sequencing: Timeline (ms), Parent Rail Regulation Window, Parent Rail Achieving Defined Threshold
● Under- and Overvoltage Thresholds: Settable Per-Rail
● Regulation Expiration Time: Settable Per-Rail
● Flexible Rail Shutdown: Parent Rail Shutdown Can Shut Down Child Rails, Independent Rail Configuration
● Per-Rail Alarm Conditions, With Timestamp: Under- and Overvoltage Glitch, Sustained Under- and/or Overvoltage, Rail Did Not Start
● I2C Interface for Configuration and Monitoring
● Microsoft Windows GUI for Configuration and Monitoring
● APPLICATIONS
● Telecommunications Switches
● Servers
● Networking Equipment
● Test Equipment
● Any System Requiring Sequencing of Multiple Voltage Rails
●TMS320 is a trademark of Texas Instruments.
●Microsoft, Windows are trademarks of Microsoft Corporation.
●All other trademarks are the property of their respective owners.
Part 3D Model
