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12-Rail Power Supply Sequencer and Monitor with ACPI Support


Package | PIN: RGC | 64
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $9.27
10-24 $8.62
25-99 $8.32
100-249 $7.27
250-499 $6.91
500-749 $6.36
750-999 $5.71
1000+ $5.69


  • Monitor and Sequence 12 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
    • Four Programmable Undervoltage and
      Overvoltage Thresholds per Monitor
  • Nonvolatile Error and Peak-Value Logging per
    Monitor (up to 12 Fault Detail Entries)
  • Closed-Loop Margining for 10 Rails
    • Margin Output Adjusts Rail Voltage to Match
      User-Defined Margin Thresholds
  • Programmable Watchdog Timer and System
  • Flexible Digital I/O Configuration
  • Pin-Selected Rail States
  • Multiphase PWM Clock Generator
    • Clock Frequencies From 15.259 kHz to
      125 MHz
    • Capability to Configure Independent Clock
      Outputs for Synchronizing Switch-Mode Power
  • JTAG and I2C/SMBus/PMBus™ Interfaces

Texas Instruments  UCD90120ARGCT

The UCD90120A is a 12-rail PMBus/I2C addressable power-supply sequencer and monitor. 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. This PC-based graphical user interface (GUI) offers an intuitive interface for configuring, storing, and monitoring all system operating parameters.