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10-Rail Power Supply Sequencer and Monitor With ACPI Support


Package | PIN: VQFN (RGZ) | 48
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $9.16
10-24 $8.24
25-99 $7.70
100-249 $6.90
250-499 $6.44
500-749 $5.60
750-999 $4.85
1000+ $4.75


  • Monitor and Sequence 10 Voltage Rails
    • All Rails SampledEvery 400 µs
    • 12-bit ADC with 2.5-V, 0.5% Internal VREF
    • Sequence Based on Time, Rail and Pin Dependencies
    • FourProgrammable Undervoltage and Overvoltage Thresholds perMonitor
  • Nonvolatile Error and Peak-Value Logging per Monitor (up to 26 Fault Detail Entries)
  • Closed-Loop Margining for 10 Rails
    • Margin Output Adjusts Rail Voltage to Match User-Defined MarginThresholds
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • Response and Monitor to GPI-Triggered Fault
  • Easily Cascade multiple Power Sequencers and Take Coordinated Fault Responses
  • Pin-Selected Rail States
  • Cascading Multiple Devices
  • Multiphase PWM Clock Generator
    • Clock Frequencies From 15.259kHz to
      125 MHz
    • Capability to Configure Independent Clock Outputs forSynchronizing Switch-Mode Power Supplies
  • JTAG and I2C/SMBus/PMBus™ Interfaces

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Texas Instruments  UCD9090ARGZT

The UCD9090A is a 10-rail PMBus/I2C addressable power supplysequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 10 power supplyvoltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on resetsignals, external interrupts, cascading, or other system functions. Ten of these pins offer PWMfunctionality. Using these pins, the UCD9090A offers support for margining, and general-purpose PWMfunctions.

Specific power states can be achieved using the Pin-Selected Rail States feature. Thisfeature allows with the use of up to 3 GPIs to enable and disable any rail. This is useful forimplementing system low-power modes and the Advanced Configuration and Power Interface (ACPI)specification that is used for hardware devices.

The TI Fusion Digital Power™ designersoftware is provided for device configuration. This PC-based graphical user interface (GUI) offersan intuitive interface for configuring, storing, and monitoring all system operatingparameters.