10-rail power supply sequencer and monitor with ACPI support

The Texas Instruments UCD9090A is a 10-rail PMBus/I2C addressable power supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 10 power supply voltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Ten of these pins offer PWM functionality. Using these pins, the device 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 three 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.