The UCD90124A is a 12-rail PMBus/I2C addressable power-supplysequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 12 power-supplyvoltage 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 PWMfunctionality. Using these pins, the UCD90124A offers support for fan control, margining, andgeneral-purpose PWM functions.
Specific power states can be achieved using the Pin-Selected Rail States feature. Thisfeature allows with the use of up to 3 GPIs to enable and disable any rail. This is useful forimplementing 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 isprovided for device configuration. This PC-based graphical user interface (GUI) offers an intuitiveinterface for configuring, storing, and monitoring all system operating parameters.