UCD90120ARGCT

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
• JTAG and I²C/SMBus/PMBus™ interfaces
• Green product and no Sb/Br