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UCD90120A

ACTIVE

12-Rail Power Supply Sequencer and Monitor with ACPI Support

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Data sheet

UCD90120A

ACTIVE
Data sheet Order now

Product details

Supply voltage (min) (V) 3 Number of supplies monitored 13 Supply voltage (max) (V) 3.6 Iq (typ) (mA) 50 Number of sequenced outputs 12 Rating Catalog Operating temperature range (°C) -40 to 125
Supply voltage (min) (V) 3 Number of supplies monitored 13 Supply voltage (max) (V) 3.6 Iq (typ) (mA) 50 Number of sequenced outputs 12 Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RGC) 64 81 mm² 9 x 9
  • 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
  • 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

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.

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

Technical documentation

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Type Title Date
* Data sheet UCD90120A 12-Rail Power Supply Sequencer and Monitor With ACPI Support datasheet (Rev. C) PDF | HTML 09 Jun 2016
Application note How to Interpret UCD90XXX CSV File PDF | HTML 29 May 2024
Application note How to Access UCD90XXX Sequencers GPIO PDF | HTML 16 Jun 2022
Application note How to Decode UCD90xxx Fault Log With PMBus (Rev. A) 07 Nov 2019
Application note Design Voltage Margining Circuit for UCD90xxx Power Sequencer and System Manager (Rev. A) 21 May 2019
Application note UCD90xxx Family Frequently Asked Questions and Answers (Rev. B) 12 Apr 2019
User guide UCD90xxx Sequencer and System Health Controller PMBus™ Command Reference (Rev. G) 03 Apr 2019
User guide UCD90xxx Sequencer Schematics Guidelines (Rev. C) PDF | HTML 24 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note How to Cascade Multiple UCD90xxx Sequencers 10 Aug 2017
User guide Fusion Digital Power Designer GUI 7.0 for the UCD90xxx Sequencer 31 May 2017
Technical article Just the FPGA I was looking for… but how do I power it? PDF | HTML 09 Nov 2015
Analog Design Journal Analog Applications Journal 4Q 2014 24 Oct 2014
Analog Design Journal Power-supply sequencing for FPGAs 24 Oct 2014
Test report TI Power Reference Design for Xilinx® Artix®-7 (AC701) 12 May 2014
User guide PMP7977 User's Guide 11 Sep 2013
User guide TSW2200 Multi-Output Power Supply Board (Rev. A) 13 Dec 2012
Application note Monitoring Voltage, Current and Temperature Using the UCD9012x 23 Mar 2012
User guide UCD90SEQ64EVM-650: 64-Pin Sequencer Development Board 27 Dec 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

UCD90SEQ64EVM-650 — Evaluation Module for UCD90xxx 64-pin Sequencer and System Health Monitor

The UCD90SEQ64EVM-650 is a fully assembled and tested circuit for evaluating the 64-pin Sequencer and System Health Controller, including the UCD90120, UCD90124, UCD90120A, UCD90124A, UCD90910 and UCD90160.

User guide: PDF
Not available on TI.com
Application software & framework

FUSION_DIGITAL_POWER_DESIGNER — Digital Power Software

Fusion Digital Power™ graphical user interface (GUI) software is used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
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Application software & framework

FUSION_MFR_GUI — Fusion Digital Power Manufacturing Tool

The Fusion Digital Power Manufacturing Tool (aka MFR GUI) is a Graphical User Interface used to download firmware, upgrade firmware, configure, calibrate and test .

The MFR GUI supports the same devices as Fusion Digital Power Designer software.  This tool is typically used in manufacturing (...)

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Simulation model

UCD90120A BSDL

SLVC496.ZIP (2 KB) - BSDL Model
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Simulation model

UCD90120A IBIS Model

SLVMCL8.ZIP (16 KB) - IBIS Model
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Calculation tool

SLVC676 — UCD90xxx Voltage Margining Circuit Design Tool

Supported products & hardware

Supported products & hardware

Products
Sequencers
UCD90120 — 12-Channel Sequencer and System Health Monitor UCD90120A — 12-Rail Power Supply Sequencer and Monitor with ACPI Support UCD90124 — 12-Rail Sequencer and System Health Controller with Fan Control UCD90124A — 12-Rail Sequencer and System Health Monitor with Fan Control and ACPI Support UCD90160 — 16-Rail Power Supply Sequencer with ACPI Support UCD90160A — 16-Rail PMBus Power Supply Sequencer and System Manager with ACPI Support UCD90240 — 24-Rail PMBus Power Sequencer and Power Manager UCD90320 — 32-Rail PMBus Power Sequencer and System Manager UCD9090 — 10-Channel Sequencer and System Health Monitor UCD9090A — 10-Rail Power Supply Sequencer and Monitor With ACPI Support
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

PMP7977 — Xilinx Artix 7 FPGA with PMBus Power Management Reference Design

The Artix 7 power management reference design board uses power modules, linear regulators, and a PMBus compliant system controller to supply all required core and auxiliary voltages needed by the FPGA, including DDR memory termination. A Digital Power graphical user interface is used to monitor the (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VQFN (RGC) 64 Ultra Librarian
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