SLVA514C July   2014  – November 2022 TPS62125

 

  1.   Using the TPS62125 in an Inverting Buck-Boost Topology
  2.   Trademarks
  3. 1Inverting Buck-Boost Topology
    1. 1.1 Design Considerations
    2. 1.2 Concept
    3. 1.3 Output Current Calculations
    4. 1.4 VIN and VOUT Range
  4. 2Digital Pin Configurations
    1. 2.1 Enable Pin
    2. 2.2 Enable Hysteresis Pin
    3. 2.3 Power Good Pin
    4. 2.4 Discharging the Output Voltage
  5. 3Startup Behavior and Switching Node Consideration
  6. 4External Component Selection
    1. 4.1 Inductor Selection
    2. 4.2 Input Capacitor Selection
    3. 4.3 Selecting L and COUT for Stability
  7. 5Typical Performance and Waveforms
  8. 6Conclusion
  9. 7References
  10. 8Revision History

7 References

  1. Texas Instruments, Creating an Inverting Power Supply From a Step-Down Regulator application note.
  2. Texas Instruments, TPS6213x 3-V to17-V, 3-A Step-Down Converter In 3-mm × 3-mm QFN Package data sheet
  3. Texas Instruments, Using a Buck Converter in an Inverting Buck-Boost Topology analog design journal
  4. Texas Instruments, Using the TPS5430 in an Inverting Buck-Boost Topology application note
  5. Texas Instruments, Using the TPS6215x in an Inverting Buck Boost Topology application note
  6. Texas Instruments, Simplifying Stability Checks application note
  7. Robert W. Erickson: Fundamentals of Power Electronics, Kluwer Academic Publishers, 1997
  8. Texas Instruments, How to Measure the Control Loop of DCS-Control™ Devices application note
  9. Texas Instruments, DCS-Control™ Landing Page