SLVUC22 July   2021 TPS62912 , TPS62913

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 EVM Features and Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Enable Level Shifter and Adjustable Threshold Voltage
      3.      Power Good Level Shifter
      4. 1.2.3 NR/SS Capacitor
      5. 1.2.4 Feedforward Capacitor
      6. 1.2.5 S-CONF Resistor
      7. 1.2.6 Loop Response Measurement
      8. 1.2.7 Single LC Filter Operation
  3. 2Setup
    1. 2.1 Input/Output Connector Descriptions
    2. 2.2 Ripple Measurement
  4. 3Test Results
  5. 4Board Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
  7. 6Bill of Materials

1 Introduction

The TPS6291x family of devices are Low Noise, Low Ripple, synchronous, step-down converters in a small 2- × 2- × 1-mm QFN package. Two different devices in this family support 2 A or 3 A of output current. Almost any ordinary buck regulator can be converted into an IBB with a few simple changes in the input and output connections. The TPS6291x family is unique as it incorporates both a low noise filter cap, as well as integrated ferrite bead compensation. The ferrite bead configuration is critical to achieve low ripple and stability of the output voltage across the full load current range. This application report details the usage of the TPS6291x conversion from a buck to an IBB, the operation of the converter and things that you need to consider to make your power supply application a success.