GUI for evaluation module (EVM)
UCD-POWER-SEQUENCER-STUDIO — Configure the UCD91XXX device family using the UCD Power Sequencer Studio
Graphical environment for configuring, storing, and monitoring parameters for the UCD91xxx sequencer family
Data sheet
UCD91320
- Sequence and monitor up to 24 analog or digital (power good) rails + 8 digital only rails
- PWM margining on up to 16 rails
- Cascade up to 4 devices to sequence up to 128 rails
- Active trim function allows user to trim output voltage
- Monitor and respond to OV, UV, time-out, and GPI-triggered faults
- Flexible sequencing dependencies, delay times, Boolean logic, and GPIO configurations
- Rail status dependent sequencing, delay times, and LGPO pins for complex sequencing applications
- Four rail profiles for adaptive voltage identification (AVID) voltage regulator
- Nonvolatile fault event logging with RTC and timestamping
- Single-event fault log (100 entries)
-
Black box fault log saves fault information and status of all rails - for the first fault and the last fault before a power down event
- Continue monitoring rails during configuration activities to maximize up-time
- Programmable watchdog timer and system reset
- GPI Controlled Rail Groups
- SEU mitigation & ECC (single-error correct + double-error detect)
- PMBus™ 1.2 compliant
-
PMBus security profile Level 0 with custom commands to enable features in security profile Level 2
The UCD91320 device is a 32-rail PMBus controlled power sequencer.
Dedicated pins (MONx) monitor up to 32 voltage rails in either analog or digital modes. 32 rail enable (ENx) pins allow regulators to be sequenced. 16 margining (MARx) pins can be used to push regulators to high or low limits (margins) for testing, or actively trim outputs for enhanced accuracy. The output state of 16 logical GPO (LGPOx) pins can be controlled by the state of GPIs, rail status, and other LGPOs.
Nonvolatile event logging preserves fault events after power dropout. The Black Box Fault Log preserves the fault information and the status of all rails. This occurs for the first fault as well as the last fault before a power down event. The cascading feature offers convenient ways to manage up to 128 voltage rails.
The Sequencer Studio™ software is an intuitive PC-based graphic user interface (GUI) that can configure, store, and monitor all system operating parameters.
The UCD91xxx devices utilize multiple security safeguards to maintain integrity of the device firmware and configuration. Because of this, TI may not be able to read out the device configuration and firmware during failure analysis or in the case of a return. Please keep record of the firmware version running on your device, as well as the configuration parameters in the device. This ensures that the TI team is able to replicate any conditions for a return.
Technical documentation
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View all 2 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCD91320 32-Rail PMBus™ Power Sequencer and System Manager datasheet | PDF | HTML | 18 Dec 2025 |
| User guide | UCD91xxx Sequencer and System Health Controller PMBus™ Command Reference | PDF | HTML | 10 Dec 2025 |
Design & development
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IDE, configuration, compiler or debugger
UCD-SEQUENCER-STUDIO — Configure the UCD91XXX device family using the UCD Sequencer Studio
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| LQFP (PZ) | 100 | Ultra Librarian |
Ordering & quality
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- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Support & training
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