The UCD90120ARGCT is a 12-rail PMBus/I2C addressable Power-supply Sequencer and Monitor with ACPI support. 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 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.
All rails sampled every 400μs
12-bit ADC with 2.5V, 0.5% internal VREF
Sequence based on time, rail and pin dependencies
Four programmable under-voltage and over-voltage thresholds per monitor
Non-volatile error and peak-value logging per monitor (up to 12 fault detail entries)
Closed-loop margining for 10 rails
Programmable watchdog timer and system reset
Flexible digital I/O configuration
Clock frequencies from 15.259kHz to 125MHz
Capability to configure independent clock outputs for synchronizing switch-mode power supplies
(EN)
