The L78L05CD13TR is a linear voltage regulator from STMicroelectronics. It is a three-terminal positive regulator that can support an output voltage of either 5V or 3.3V and a maximum current output of up to 100mA. It comes in an SOT-89 package and features low output noise, low dropout voltage and low supply current. The product also features short-circuit and thermal protection, making it a reliable and highly efficient regulator to use in different applications.