UCD90910 Description
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.
UCD90910 Key Features
- 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