Tool/software:
I am attempting to simulate a simple buck converter in PSpice using a TPS563300. The datasheet indicates that pins NC0 and NC1 must be left floating, and that EN can be left floating. When the aforementioned pins are left floating in PSpice the give an error. I constructed my circuit to match the design output by WEBENCH Power Designer, so there should be no issues in the design of the circuit itself. I have included images and extra details below. I do not know enough to narrow down what the issue may be; I would appreciate any help or ideas on issues with the settings in the programs, models, design, etc that could be causing this issue. I am new to using buck converters and to spice simulation, so I would be grateful feedback in layman's terms.
Extra Notes
- Setting the pins at issue to non-connects resulted in the same floating issue.
- Connecting EN to +V solves the error on that pin but should not be required according to the datasheet.
- Connecting NC0 and NC1 to ground directly while EN is connected to +V, results in the simulation running with incorrect results. The results can be seen below.
- Connecting the NC pins to ground via a large resistor results in an error stating that there are less than two connections at the node of each NC pin.
- The PSpice model was found at: TPS563300 data sheet, product information and support | TI.com
