SLUAAI0 January   2022 TPS62810-Q1 , TPS62811-Q1 , TPS62812-Q1 , TPS62813-Q1 , TPS62816-Q1 , TPS628501 , TPS628501-Q1 , TPS628502 , TPS628502-Q1 , TPS628503 , TPS628503-Q1 , TPS628510 , TPS628511 , TPS628512 , TPS62870 , TPS62870-Q1 , TPS62871 , TPS62871-Q1 , TPS62872 , TPS62872-Q1 , TPS62873 , TPS62873-Q1 , TPS62874-Q1 , TPS62875-Q1 , TPS62876-Q1 , TPS62877-Q1 , TPS62A01 , TPS62A01A , TPS62A02 , TPS62A02A , TPS62A06 , TPS62A06A , TPSM82810 , TPSM82813 , TPSM8287A06 , TPSM8287A10 , TPSM8287A12 , TPSM8287A15

 

  1.   Trademarks
  2. 1Introduction
  3. 2Loop Gain Measurement
  4. 3Output Impedance Measurement of TPS62816
  5. 4Bode Plot Reconstruction and Comparisons with Voltage Injection Method
  6. 5Conclusion
  7. 6References

Conclusion

As demonstrated in this application note, a loop gain reconstruction can be performed by measuring the output impedance of a DC-DC converter in different operating states. An output impedance measurement can give very useful insights regarding the DC-DC converter performances. In addition to bandwidth and phase margin evaluation of a power supply, an output impedance measurement can also help to evaluate the converter ability to recover from a certain load or to verify that a target output Impedance is met to achieve a strict load step requirement.