UCD90120A 12-Rail Power Supply Sequencer and Monitor with ACPI Support | TI.com

UCD90120A (ACTIVE)

12-Rail Power Supply Sequencer and Monitor with ACPI Support

 

The most current UCD90xxx PMBus™ Command Reference is available at http://www.ti.com/fusiondocs

Description

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.

Features

  • 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
      Dependencies
    • 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
    Reset
  • 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
      Supplies
  • JTAG and I2C/SMBus/PMBus™ Interfaces

View more

Parametrics Compare all products in Sequencers

 
Number of supplies monitored
VCC (Min) (V)
VCC (Max) (V)
Iq (Typ) (uA)
Time Delay (ms)
Number of sequenced outputs
Rating
Pin/package
UCD90120A UCD90124A UCD90160A UCD90240 UCD90320 UCD9090A
13     12     16     24     32     10    
3     3     3     3.15     3.15     3    
3.6     3.6     3.6     3.63     3.63     3.6    
50000     50000     50000     31400     31400     50000    
Programmable     Programmable     Programmable     Programmable     Programmable     Programmable    
12     12     16     24     32     10    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
64VQFN     64VQFN     64VQFN     157BGA MICROSTAR JUNIOR     169NFBGA     48VQFN