SLVAER0B August   2020  – December 2020 TPS55288 , TPS55288-Q1 , TPS552882 , TPS552882-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2TPS55288 Layout Guide Line
    1. 2.1 Identification of the Critical Switching Loops
    2. 2.2 Power Component Placement
    3. 2.3 Driver Circuit and Signal Circuit Routing
    4. 2.4 Power and GND Plane Design
  4. 3Summary
  5. 4References
  6. 5Revision History

1 Introduction

The TPS55288 buck-boost converter is widely used in the USB Type-C™ PD applications, like industry PC, car charger, and dockings. The output power range can be from around 10 W to 100 W based on the different input voltage.

A well-planned PCB layout is fundamental to careful system design of any DC/DC or AC/DC power converter. An optimized layout leads to better EMI performance, better thermal performance, and good stability performance within a relatively smaller solution size. So an optimized layout means higher reliability, lower cost, and faster release time to market.

This application note gives out the TPS55288 buck-boost converter layout guideline. Under the guidance of this application note, the customers can achieve the above goals easily with a 4-layer PCB. The main content includes identification of the critical switching loops, power-stage component placement, power circuit, and signal circuit routing, AGND and PGND connection, power and GND copper plane design.