SLVUCF2 March   2022 TPS55289

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 Modification
      1. 1.2.1 Modification
  3. 2Connector, Test Point, and Jumper Descriptions
    1. 2.1 Connector and Test Point Descriptions
    2. 2.2 Jumper Configuration
      1. 2.2.1 JP1 (ENABLE)
      2. 2.2.2 JP6 (SYNC)
      3. 2.2.3 JP7 (I2C Target Address Selection)
      4. 2.2.4 JP8 (Internal or External VCC Selection)
      5. 2.2.5 JP9 and JP10 (External Feedback and Internal Feedback Selection)
  4. 3Test Procedure
  5. 4Software User Interface
    1. 4.1 Install USB2ANY Explorer
    2. 4.2 GUI Installation
    3. 4.3 Interface Hardware Setup
    4. 4.4 User Interface Operation
    5. 4.5 Register Map Screen
  6. 5Schematic, Bill of Materials, and Board Layout
    1. 5.1 Schematic
    2. 5.2 List of Materials
    3. 5.3 Board Layout

2.2.4 JP8 (Internal or External VCC Selection)

The JP8 jumper is for the internal LDO or external VCC selection. By default, the jumper is set to the VCC position and the device selects an internal LDO as the VCC source.

To minimize the power dissipation of the internal LDO when both input voltage and output voltage are high, an external 5-V power supply can be applied at the VCC pin to supply the TPS55289. Place a jumper across EXTVCC and AGND to set the device VCC source externally. The external 5-V power supply must have at least 100-mA output current capability and must be within the 4.75-V to 5.5-V regulation range.