TPS54328 is supposed to run with switching frequency close to 700kHz at steady state, but Webench shows in its report a frequency of 644kHz. For this particular application operating conditions are:
Vin = 5V
Vout = 1.5V
Iout = 3.0A
1. Why Webench is showing Fsw = 644kHz?
2. Why PSpice TPS54328 model is so unstable with any currents above 1A? With the project straight from the website, the output never regulates to the voltage (in this case 1.05V). The TINA model runs fine though.