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. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions.
UCD90124 Key Features
- 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