SLVAE69 July   2019 TPS568215 , TPS56C215

 

  1.   Expand Buck Converter Minimum Input Voltage with External VCC Bias
    1.     Trademarks
    2. 1 TPS56C215 Introduction
    3. 2 12 V / 5 V O-ring supply for DDR application
    4. 3 Schematic and Bench Results
      1. 3.1 Efficiency Comparison
      2. 3.2 Bench Waveforms
    5. 4 Conclusion
    6. 5 References

1 TPS56C215 Introduction

TPS56C215 is a monolithic 12-A synchronous buck converter with an adaptive on-time D-CAP3™ control mode. The device integrates low RDS(on) power MOSFETs that enable high efficiency and offer ease-of-use with minimum external component count, handy for space-conscious power systems.

The TPS56C215 has a 4.7 V internal LDO that generates a bias for all internal circuitry. There is a feature to overdrive this internal LDO with an external voltage on the VREG5 pin which improves the converter’s efficiency. Figure 1 is the Typical Application Diagram of TPS56C215.

TPS56C215_Schematic.gifFigure 1. TPS56C215 Typical Application Diagram