PSpice let you choose maximum time step size for transienet analysis. This is an optional argument. If this argument is defined, simulator would not exceed this limit, however it can go below this, if circuit demands so.
To set the maximum step limit, in OrCAD Capture, select PSpice>Simulation Setting >Analysis TAB , under Time Domain (transient) Analysis Type, define the "Maximum step size" value.
Be careful with value, a very small value would slowdown the simulation and generate huge data. Defining this value would also lead to different result vis-a-vis the case when this simulation parameter is not defined. Although generally both of these would be in broad agreement with each other.