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UCD9090A

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10-Rail Power Supply Sequencer and Monitor With ACPI Support

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Data sheet

UCD9090A

ACTIVE
Data sheet Order now

Product details

Supply voltage (Min) (V) 3 Number of supplies monitored 10 Supply voltage (Max) (V) 3.6 Iq (Typ) (uA) 50000 Time delay (ms) Programmable Number of sequenced outputs 10 Rating Catalog
Supply voltage (Min) (V) 3 Number of supplies monitored 10 Supply voltage (Max) (V) 3.6 Iq (Typ) (uA) 50000 Time delay (ms) Programmable Number of sequenced outputs 10 Rating Catalog
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VQFN (RGZ) 48 49 mm² 7 x 7
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  • 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 26 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
  • 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 15.259 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 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 26 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
  • 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 15.259 kHz to
      125 MHz
    • Capability to Configure Independent Clock Outputs for Synchronizing Switch-Mode Power Supplies
  • JTAG and I2C/SMBus/PMBus™ Interfaces
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The UCD9090A is a 10-rail PMBus/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 can be used 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 UCD9090A 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 UCD9090A is a 10-rail PMBus/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 can be used 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 UCD9090A 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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Technical documentation

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Type Title Date
* Data sheet UCD9090A 10-Rail Power Supply Sequencer and Monitor With ACPI Support datasheet (Rev. A) 08 Feb 2019
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
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) 24 Mar 2019
Application note UCD90160/UCD9090A PMBus Command Migrating Guide 01 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Sequencing solutions: simple, reliable and cost-effective 27 Sep 2017
Application note How to Cascade Multiple UCD90xxx Sequencers 10 Aug 2017
Technical article A smart solution to sequence and monitor multiple power rails in a system 27 Jul 2017
Application note Improvements to UCD9090A and UCD90160A Devices 26 Jun 2017
User guide Fusion Digital Power Designer GUI 7.0 for the UCD90xxx Sequencer 31 May 2017
Technical article Sequencing and managing multiple power rails in a system: common questions answered 01 Feb 2017
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

UCD90SEQ48EVM-560 — Evaluation Module for UCD9090 10-Channel Sequencer and System Health Monitor

The UCD90SEQ48EVM-560 (EVM) is a fully assembled and tested circuit with a 48-pin socket and interface circuitry. The EVM allows system level development using the UCD9090RGZ 10-Channel Sequencer and System Health Monitor. A USB cable is included to connect the EVM to the PC operating the EVM GUI.
document-pdfAcrobat User guide
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Interface adapter

USB-TO-GPIO — USB Interface Adapter EVM

This EVM serves as an interface adapter or a bridge between a host PC (IBM™ compatible) and one or multiple slave devices via a standard type-A to mini-B USB cable. The communication between the USB interface adapter and the host PC is via USB, while the communication between the USB (...)

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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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Simulation model

UCD9090 IBIS Model

SLVMBT8.ZIP (16 KB) - IBIS Model
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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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Calculation tool

UCD90xxx Voltage Margining Circuit Design Tool

SLVC676.ZIP (88 KB)
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Package Pins Download
VQFN (RGZ) 48 View options

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