UCD90124
Overview
The UCD90124 is a 12-rail PMBus/I2C 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.
- 2 Monitor and Sequence 12 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 Four 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 10 Fault Detail Entries)
- Closed-Loop Margining for 10 Rails - Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds
- Programmable Watchdog Timer and System Reset
- Flexible Digital I/O Configuration
- Multiphase PWM Clock Generator - Clock Frequencies From 15.259 kHz to 125 MHz - Capability to Configure Independent Clock Outputs for Synchronizing Switch-Mode Power Supplies
- Internal Temperature Sensor
- JTAG and I2C/SMBus/ PMBus™ Interfaces
