SLUAAN6 December   2022 TPS53211

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2MOSFET Selection for TPS53211 Synchronous BUCK controller
  5. 3Summary
  6. 4References

3 Summary

The TPS53211 Synchronous BUCK controller uses external MOSFETs. The selection of the MOSFETs used with the TPS53211 will determine the power conversion efficiency. Designers need to use a MOSFET selection optimization technique such as the J/K method for selecting MOSFETs that provide the best performance within the cost and size constraints of the design.

While rare, if designers choose to use parallel MOSFETs for the High-Side or Low-Side MOSFETs, separate series resistor need to be used for each parallel MOSFET.

In addition, designers need to limit the total gate drive current to less than 50 mA and the total low-side FET gate capacitance at Vgs = 6.5 V to less than 55 nC.