UCD90910 - Texas Instruments

UCD90910 10-Rail Sequencer and System Health Monitor

The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins can be used for power-supply enables, power-on-reset signals, external interrupts, cascading, or other system functions. Twe.

Features

1
•23 Monitor and Sequence Ten Voltage Rails
  – All Rails Sampled Every 400 ms
  – 12-Bit ADC With 2.5-V, 0.5% Internal VREF
  – Sequence Based on Time, Rail and Pin Dependencies
  – Four Programmable Undervoltage and Overvoltage Thresholds per Monitor
• Fan Control and Monitoring
  – Supports Ten Fans With Five User-Defined Speed-vs-Temperature Setpoints
  – Supports Two-, Three-, and Four-Wire Fans
• Nonvolatile Error and Peak-Value Logging per Monitor (up to 12 Faults)
• Closed-Loop Margining for Ten Rails
  – Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds
• Programmable Watc.