UCD90120
Overview
The UCD90120 Power Supply Sequencer and System Health Monitor monitors and sequences up to 12 independent voltage rails. The device integrates a 12-bit ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, current, or temperature inputs. 26 GPIO pins can be used.
- 2 Monitor and Sequence 12 Voltage Rails - All Rails Sampled Every 200µs - 12-bit ADC With 2.5V, 0.5% Internal VREF - Sequence Based on Time, Rail and Pin Dependencies - Six Hardware Comparators for Power Supply Fault Response in < 80µs - Four Programmable Under-Voltage and Over-Voltage Thresholds per Monitor - Programmable Fault Response Including Retries, Shutdown Slaves and Resequence
- Non-Volatile Error Logging - Stores Up To 18 Faults - Log Peak Values For All Monitor Inputs
- Closed Loop Margining for 10 Rails - Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds - Unused Margin Outputs can be Used as GPIOs or General-Purpose PWM Outputs
- Watchdog Timer and System Reset - Programmable WDT Reset and Start Times - Configurable System Reset Pulse Widths
- Flexible Digital I/O Configuration - Boolean Logic Builder for GPO Config - GPIOs can be Used as Enables, Resets, Power Good and Other On-Board Functions
- Wide Range Single Supply (3.3V to 12V) - Internal Temperature Sensor - 64-Pin QFN Package
- JTAG and I2C/SMBus/PMBus Interfaces
- Fusion Digital Power™ GUI for Configuring and Monitoring Device Operation
