The TLVM65030 step-down DC-to-DC module is typically used to convert a higher DC voltage to a lower DC voltage with a maximum output current of 3A. The following design procedure can be used to select components for the TLVM65030.
Note: All of the capacitance values given in the
following application information refer to effective values unless otherwise
stated. The effective value is defined as the actual capacitance under DC
bias and temperature, not the rated or nameplate values. Use high-quality, low-ESR,
ceramic capacitors with an X7R or better dielectric throughout. All high value
ceramic capacitors have a large voltage coefficient in addition to normal tolerances
and temperature effects. Under DC bias, the capacitance drops considerably. Large
case sizes and higher voltage ratings are better in this regard. To help mitigate
these effects, multiple capacitors can be used in parallel to bring the minimum
effective capacitance up to the required value. This action can also ease
the RMS current requirements on a single capacitor. A careful study of bias and
temperature variation of any capacitor bank must be made to make sure that the
minimum value of effective capacitance is provided.