Top

Product details

Parameters

Number of supplies monitored 10 VCC (Min) (V) 3 VCC (Max) (V) 3.6 Iq (Typ) (uA) 50000 Time delay (ms) Programmable Number of sequenced outputs 10 Rating Catalog open-in-new Find other Sequencers

Package | Pins | Size

VQFN (RGZ) 48 49 mm² 7 x 7 open-in-new Find other Sequencers

Features

  • 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

All trademarks are the property of their respective owners.

open-in-new Find other Sequencers

Description

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.

open-in-new Find other Sequencers
Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 15
Type Title Date
* Datasheet UCD9090A 10-Rail Power Supply Sequencer and Monitor With ACPI Support datasheet (Rev. A) Feb. 08, 2019
Application note How to Decode UCD90xxx Fault Log With PMBus (Rev. A) Nov. 07, 2019
Application note Design Voltage Margining Circuit for UCD90xxx Power Sequencer and System Manager (Rev. A) May 21, 2019
Application note UCD90xxx Family Frequently Asked Questions and Answers (Rev. B) Apr. 12, 2019
User guide UCD90xxx Sequencer and System Health Controller PMBus™ Command Reference (Rev. G) Apr. 03, 2019
User guide UCD90xxx Sequencer Schematics Guidelines (Rev. C) Mar. 24, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Sequencing solutions: simple, reliable and cost-effective Sep. 27, 2017
Application note How to Cascade Multiple UCD90xxx Sequencers Aug. 10, 2017
Technical article A smart solution to sequence and monitor multiple power rails in a system Jul. 27, 2017
Application note Improvements to UCD9090A and UCD90160A Devices Jun. 26, 2017
User guide Fusion Digital Power Designer GUI 7.0 for the UCD90xxx Sequencer May 31, 2017
Technical article Sequencing and managing multiple power rails in a system: common questions answered Feb. 01, 2017
Application note Monitoring Voltage, Current and Temperature Using the UCD9012x Mar. 23, 2012
User guide UCD90SEQ64EVM-650: 64-Pin Sequencer Development Board Dec. 27, 2010

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description
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.
Features
  • Monitor and Sequence 10 Voltage Rails
  • Non-Volatile Error and Peak-Value Logging per Monitor (up to 30 faults)
  • Closed Loop Margining for 10 Rails
  • Pin-Selected Rail States
  • Multiphase PWM Clock Generator
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • Internal Temperature (...)
INTERFACE ADAPTER Download
99
Description

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 interface (...)

Features
  • Supports master mode I²C, SMBus or PMBus as well as GPIO.
  • Supports USB1.1 full speed at 12 Mbit/s. The USB interface adapter is recognized by the host as a generic human interface device (HID), so no proprietary USB or HID driver is needed. Therefore, the USB interface adapter can be treated as a (...)

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) 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.
Features

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)

Design tools & simulation

SIMULATION MODEL Download
SLVMBT8.ZIP (16 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOL Download
SLVC676.ZIP (88 KB)

CAD/CAE symbols

Package Pins Download
VQFN (RGZ) 48 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos