SLVU445C March 2011 – August 2021 TPS56121
TPS56121EVM-601 provides two test points for measuring the switch node. To monitor the switch node voltage, set oscilloscope per Oscilloscope For Switching Waveforms in Section 5.1.4. Connect the oscilloscope probe to TP11 and the ground lead of the probe to TP12. To monitor the voltage spike on switch node, please remove the bandwidth limit on the oscilloscope and refer to the Application Report SLPA005 (Reducing Ringing Through PCB Layout Techniques) for the measurement techniques.