SLAU968 December   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Setup
    3. 2.3 Jumper Information
    4. 2.4 PMBus Address Configuration
    5. 2.5 Header Information
    6. 2.6 Push Buttons
    7. 2.7 Interfaces
    8. 2.8 Debug Information
    9. 2.9 Test Points
  8. 3Software
    1. 3.1 Software Description
    2. 3.2 GUI Installation
    3. 3.3 Programming Options
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation
    1. 6.1 Supplemental Content
  12. 7References
  13.   Revision History

2.1 Power Requirements

The UCD91320 has a recommended positive voltage supply value of 2.9V to 3.6V. The device also has requirements for a 10uF bulk capacitor and 100nF decoupling capacitor between VDD and VSS, which are already populated on the EVM. The BPCAP pin also requires a 0.47uF capacitor connected to ground which is populated on the EVM.

To actually supply the device with power, there are 2 options:

  1. Micro-USB cable

  2. External power supply

  3. USB-TO-GPIO2

The Micro-USB connection includes a path through an LDO to step the voltage down to the correct operating voltage for the UCD91320 device.

When using the external power supply, you can utilize 5V and configure the device jumpers to continue to utilize the same LDO as the Micro-USB supply. Alternatively you can supply the device and bypass the LDO using the jumpers. Please check the jumper configuration section for specifics info on how to configure these correctly.