SLVSHK0 December   2025 UCD91160

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Linearity Parameters
    7. 5.7 POR and BOR
    8. 5.8 Low Frequency Crystal/Clock
    9. 5.9 Flash Memory Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 TI Sequencer Studio Software
      2. 6.3.2 PMBUS Interface
      3. 6.3.3 PMBUS Security
    4. 6.4 Device Functional Modes
      1. 6.4.1 Black Box First Fault Logging
      2. 6.4.2 PMBus Address Selection
      3. 6.4.3 Brownout
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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3 Description

The UCD91160 device is a 16-rail PMBus controlled power sequencer in a 64-pin QFP package.

Dedicated pins (MONx) monitor up to 16 voltage rails in either analog or digital modes. 16 rail enable (ENx) pins allow regulators to be sequenced. 8 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. The black box fault log records the first and last fault event before a power down. The cascading feature offers convenient ways to manage up to 64 voltage rails.

A user defined fault pin coordinates the cascaded devices to take synchronized fault responses. The user can select up to 8 groups of rail configurations using 3 GPIs. These configurations can implement system low-power modes as outlined in the Advanced Configuration and Power Interface (ACPI) specification.

The Sequencer Studio™ software is an intuitive PC-based graphic user interface (GUI) that can configure, store, and monitor all system operating parameters.

Packaging Information Table
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
UCD91160SPMRLQFP (64)12.0mm × 12.0mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
UCD91160 Simplified Application DiagramFigure 3-1 Simplified Application Diagram