TPS54418: 1KHz ripple at Vout

Hi, 

Can you post a waveform of the PH pin and Vout?  This could be instability.

Is there more output capacitance downstream at the load?

The TPSM82864A is a newer, smaller, easier to use power module.

Thanks,

Chris

This is the Vout

Thanks for sharing.

Is there anything downstream running at 1kHz?  Can you remove the system load and just add a resistor instead?

This doesn't look like instability, but rather a 1 kHz load transient.

Chris

Yes indeed, the load is causing the 1Khz noise.

Anyway to reduce or remove this noise?

Thanks for confirming.

If the load is making a 1 kHz signal, then you should stop whatever is making the 1 kHz.

This is not an issue for the TPS54418.  It is causing an issue in your system?  Can you hear it, for example?

Chris