The UCD9090-Q1 is a 10-rail PMBus- and 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 are usable 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 UCD9090-Q1 offers support for margining and for general-purpose PWM functions.
One can achieve specific power states using the pin-selected rail-states feature. This feature allows enabling or disabling any rail by the use of up to three GPIs. This feature is useful for implementing system low-power modes and the Advanced Configuration and Power Interface (ACPI) specification that is used for hardware devices.
Use of the TI Fusion Digital Power designer software assists in device configuration. This PC-based graphical user interface (GUI) offers an intuitive interface for configuring, storing, and monitoring all system operating parameters.
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
Device Temperature Grade 1: –40°C to 125°C Ambient Operating
Temperature Range
Device HBM ESD Classification Level H2
Device CDM ESD Classification Level C4B
Monitor and Sequence 10 Voltage Rails
All Rails Sampled Every 400 µs
12-Bit ADC With 2.5-V, 0.5% Internal VREF
Sequence Based on Time, Rail, and Pin Dependencies
Four Programmable Undervoltage and Overvoltage Thresholds
per Monitor
Nonvolatile Error and Peak-Value Logging
per Monitor (up to 30 Fault Detail Entries)
Closed-Loop Margining for 10 Rails
Margin Output Adjusts Rail Voltage to Match User-Defined
