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TINA/Spice/TPS53819A: TINA/Spice/TPS53819A simulation waveform problem(low shock in output ripple

Part Number: TPS53819A
Other Parts Discussed in Thread: TINA-TI, TPS53819

Tool/software: TINA-TI or Spice Models

Hi, TI expert:

When use TPS53819 PSPICE models with CSD86360 PSPICE models, the output set to 5v, I found in steady state, there was a low frequency shock in the output ripple.

P12V is input, the output voltage is P5V, the schematic is below:

The stead state with 5A simulation as below: