The temperature rate of change of the X5R dielectric is ±15% over the -40°C to +85°C temperature range, independent of package or voltage rating. Equation 1 can be used to determine the worst-case capacitance when considering changes in capacitance with temperature, component tolerance, and voltage.
In order to guarantee the performance of the LDO, it is necessary to understand and evaluate the effect of the bypass capacitor’s DC bias, temperature variation, and tolerance on the selected capacitor. Additionally, capacitive technology must also be carefully considered in applications requiring low noise, low drift, or high signal integrity. All capacitors suffer from nonideal behavior, but some capacitor techniques are better suited for certain applications than others.