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TPS53319 & TPS53353 Ripple Injection

Christopher Daily1
Intellectual 400 points
Other Parts Discussed in Thread: TPS53319, TPS53353

E2E Team,

One of my customers finds WEBENCH as a great tool to use for their designs.  They find it as a great resource to get their products to market fast and effectively.  There is one concern with the TPS533xx series of converters, regarding the ripple injection components.  It was observed that the WEBENCH did not have these components for the TPS53353 simulation but it did have the components for the TPS53319 simulation.  

Is there a reason why WEBENCH would/would not place these ripple injection components for loop stability?

Also, how interchangeable are the TPS53353 and TPS53319 devices?  For example, if I had a design requirement of 1.5V @ 12A, would I be able to use both parts with the same exact external components?

Thanks TI Team!