UCD9090 Description
The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply voltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions.
UCD9090 Key Features
- 1 Monitor and sequence 10 voltage rails
- All rails sampled every 400 μs
- 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
- Nonvolatile error and peak-value logging per monitor (up to 30 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