TIDUET0A November   2019  – July 2020

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS61088-Q1
      2. 2.3.2 LMR33630-Q1
      3. 2.3.3 TPS7A2501
      4. 2.3.4 ATL431AIBDZR
    4. 2.4 System Design Theory
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Related Documentation
    1. 5.1 Trademarks
    2. 5.2 Third-Party Products Disclaimer
  11. 6About the Author
  12. 7Revision History

2.2 Design Considerations

A key feature of this reference guide is that when the buck converter browns out, the TPS61088-Q1 boost converter can supply voltage to the system immediately. The TPS61088-Q1 boost converter is always enabled to work. When the buck converter works normally and output 9 V, this 9 V voltage added at the output of the TPS61088-Q1, makes the FB pin voltage higher than 1.3 V, so the TPS61088-Q1 stops switching, it works at the low power dissipation mode, the current draws from the input side is less than 3uA.