The UCD90120A 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 UCD90120A offers support for margining, and general-purpose
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.
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