PSRR is important to consider when dealing with noise sensitive systems. This specification is typically measured on a logarithmic scale in units of decibels and a typical PSRR value found for linear regulators is approximately 65 dB to 80 dB. Thermal resistance values, such as ThetaJA and ThetaJC, are important when heat dissipation capabilities are a concern since it is important that the junction (die) not exceed its datasheet specification value. Once the maximum power consumption of the regulator is known based on the input-output voltage differential and output current, the junction temperature can be calculated by using the equations shown here. This calculation is important to ensure that the junction temperature of the regulator is within the desired specification range in order to avoid device failure.