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TINA/Spice/LM53602-Q1: PSPICE Transient Model for System Noise Simulation

Part Number: LM53602-Q1
Other Parts Discussed in Thread: TINA-TI, , LM53602

Tool/software: TINA-TI or Spice Models


Is LM53602 5p0V PSpice Transient Model accurate enough for system noise simulation of LM53602-Q1 supply circuit? Switching waveform at SW pin obtained through this PSPICE model looks different from an actual waveform of a real LM53602-Q1 supply circuit, which results in a large difference in switching noise performance between the actual and the simulation circuit.

If the LM53602 5p0V PSpice Transient Model is not eligible for the purpose, do you plan to release a new and more accurate transient PSPICE model?

Best regards,
Shinichi Yokota

  • Yokota-san,

    Please share waveforms so I can take a look at the discrepancy.

    I don't believe a new model is in the pipeline.

  • Shinichi-san,

    Thank you for sending me the comparison between the real board waveform vs the spice model.

    The spice model is a simplified version of the real waveform. The spice model shows the general operation of the part with less attention to noise or parasitics. Unfortunately this model does not include the level of detail needed to make your measurements. However discrepancies between even the best spice models vs a real board can vary by a large margin. More detailed analysis would need more detailed models but in the end the real results will be taken on a real board.