●DESCRIPTION
●The UCD9080 Power Supply Sequencer controls the enable sequence of up to 8 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 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 shutdown a user-defined set of other rails, and alarm conditions are monitored on a per-rail basis.
●FEATURES
●• Single Supply Voltage: 3.3 V
●• Low Power Consumption
●• Sequences and Monitors up to 8 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 Shutdown 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
