The UCD90124A is a 12-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 12 power-supply voltage inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality. Using these pins, the UCD90124A offers support for fan control, margining, and general-purpose PWM functions.
●Specific power states can be achieved using the Pin-Selected Rail States feature. This feature allows with the use of up to 3 GPIs to enable and disable any rail. This is useful for implementing system low-power modes and the Advanced Configuration and Power Interface (ACPI) specification that is used for hardware devices.
●The TI Fusion Digital Power designer software is provided for device configuration. This PC-based graphical user interface (GUI) offers an intuitive interface for configuring, storing, and monitoring all system operating parameters.
● Monitor and Sequence 12 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 12 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
● Pin-Selected Rail States
● 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
● JTAG and I2C/SMBus/PMBus Interfaces
● APPLICATIONS
● Industrial / ATE
● Telecommunications and Networking Equipment
● Servers and Storage Systems
● Any System Requiring Sequencing and Monitoring of Multiple Power Rails
