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UCD90910
  • UCD90910
  • UCD90910

UCD90910

ACTIVE

10-Rail Sequencer and System Health Monitor with Integrated 10-Channel Fan Controller

Texas Instruments UCD90910 Product Info

1 April 2026 1

Parameters

Number of supplies monitored

10

Number of sequenced outputs

10

Rating

Catalog

Supply voltage (max) (V)

3.6

Supply voltage (min) (V)

3

Iq (typ) (mA)

50

Operating temperature range (°C)

-40 to 125

Package

VQFN (RGC)-64-81 mm² 9 x 9

Features

  • Monitor and Sequence Ten 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
  • Fan Control and Monitoring
    • Supports Ten Fans With Five User-Defined Speed-vs-Temperature Setpoints
    • Supports Two-, Three-, and Four-Wire Fans
  • Nonvolatile Error and Peak-Value Logging per Monitor (up to 12 Faults)
  • Closed-Loop Margining for Ten Rails
    • Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • 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
  • Internal Temperature Sensor
  • JTAG and I2C / SMBus / PMBus Interfaces
  • Full Configuration Update while in Normal Mode Capability
  • APPLICATIONS
    • Industrial / ATE
    • Telecommunications and Networking Equipment
    • Servers and Storage Systems
    • Any System Requiring Sequencing and Monitoring of Multiple Power Rails

  • Monitor and Sequence Ten 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
  • Fan Control and Monitoring
    • Supports Ten Fans With Five User-Defined Speed-vs-Temperature Setpoints
    • Supports Two-, Three-, and Four-Wire Fans
  • Nonvolatile Error and Peak-Value Logging per Monitor (up to 12 Faults)
  • Closed-Loop Margining for Ten Rails
    • Margin Output Adjusts Rail Voltage to Match User-Defined Margin Thresholds
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • 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
  • Internal Temperature Sensor
  • JTAG and I2C / SMBus / PMBus Interfaces
  • Full Configuration Update while in Normal Mode Capability
  • APPLICATIONS
    • Industrial / ATE
    • Telecommunications and Networking Equipment
    • Servers and Storage Systems
    • Any System Requiring Sequencing and Monitoring of Multiple Power Rails

Description

The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature 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 UCD90910 offers support for fan control, margining, and general-purpose PWM functions.

Fan-control signals can be sent using PMBus commands or generated from one of two built-in fan-control algorithms. PWM outputs combined with temperature and fan-speed measurements provide a complete fan-control solution for up to ten independent fans.

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 UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature 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 UCD90910 offers support for fan control, margining, and general-purpose PWM functions.

Fan-control signals can be sent using PMBus commands or generated from one of two built-in fan-control algorithms. PWM outputs combined with temperature and fan-speed measurements provide a complete fan-control solution for up to ten independent fans.

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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