The search for the best linear regulator starts with analyzing key system specifications such as: input voltage range, output voltage, current demand, and available space. Output voltage accuracy specifications are analyzed for applications that desire accuracy such as precision measuring instruments or powering microcontrollers. Thermal limitations of the device should be explored to avoid exceeding the datasheet specification of the junction (die) temperature, which can lead to device failure. For noise sensitive applications such as powering audio, RF, and low-jitter timing products, it is quite common to use a linear regulator following a switching regulator. In such cases the inherent output noise of the linear regulator and its ability to reject input noise become quite important.