APPLICATION NOTE
10
In this setup (refer figure 9) you will notice that an additional voltage source V7 has been added to the
input. The purpose of this voltage source is to simulate the effect of input voltage fluctuation. This is also
used for measurement of VRM performance under fluctuating line conditions. To perform this
measurement under various load conditions, simulation setup includes parametric sweep for load
resistance. In order to perform parametric sweep analysis make the following two changes in the design.
1. Set the component value as variable (refer figure 10): Edit the component value onto schematic
and set it's value as {PARAMETER NAME}; for example {RLOAD}
2. Define PARAMETER NAME as variable in schematics: Place the PARAM component (available
in special.olb) onto schematic. Select and edit properties. Add New Property. Define Property
name as RLOAD and set a default value. Then configure the simulation profile to sweep this
parameter.
Figure 9: Input Line variation
