EN6337QA SPICE model

there are so many reasons why this is an unacceptable solution. I am happy to talk about this on the phone but these problems are indicative of everything wrong for virtually all power IC suppliers. So i am not picking on you, but this is really bad.

1) the model is junk. see below. If the output impedance is not right NOTHING about the closed loop response will be correct (like step load). The model is not close as you can see by the impedance in the XLS tool. I am not sure how someone is supposed to know not to use this model in AC or transient? You should withdraw it.

2) it is completely unacceptable to evaluate stability in a separate tool like excel. Stability is dependent on the load impedance (not just the local bulk). you tool will not get the real stability correct and doesn't allow me to assess the PDN response which is what is important.

3) a model that exhibits the correct output impedance is essential to assessing power integrity plane impedance resonances/step load response/ripple. PDN design is critical and the VRM must be part of it.

4) So you need to include tolerances as the variance is large and you must also model the output impedance correctly over load current and output voltage

5) you can't encrypt the model because you can't simulate the Power IC alone. The PCB must also be included otherwise you will get the wrong answer. There are models in other simulators that need to be simulated along with the power IC. The only way to support all simulators and models in other formats is to either make encrypted models in ADS and PSPICE or make an unencrypted model. We have a free template that we have published that you can use to make and publish unencrypted models. LTspice is a useless tool as you can't include the PCB in the simulation.