SLVAEZ2 September   2020  – MONTH  TPSM41625

 

  1.   Trademarks
  2. 1Introduction
  3. 2Effect of Reducing Output Capacitance on Loop Response
  4. 3Effect of Ramp Setting on Loop Response
  5. 4Effect of Switching Frequency on Loop Response
  6. 5Improving Stability by Decreasing the Voltage Reference and Adding a Feedforward Capacitor
  7. 6Summary
  8. 7References

6 Summary

This application report has shown how the output capacitor configuration, ramp setting, and switching frequency can affect the loop response of the TPSM41625. Furthermore, this report has demonstrated how a lower reference voltage and a feedforward capacitor help improve the loop stability when using all ceramic output capacitor configurations. With the lower reference voltage and feedforward capacitor, the example 12-V input 1.8-V output 25-A design with three 100-μF ceramic output capacitors is made stable while maintaining ±3% undershoot and overshoot for a 0 to 5 A step at 10 A/μs.