The UMW78M05 is a Linear Voltage Regulator, specifically designed for the TO-252 RoHS package, manufactured by Youtai. It can regulate an input voltage of 5V and provide an output voltage of 5V with a maximum output current of 500mA. It features an operating temperature range of -40°C to +125°C, and a PSRR of up to 70 dB at the 10kHz mark. This linear voltage regulator is designed for use in various applications, such as power supplies and converters. Other features include good thermal performance, over-temperature protection, and over-current protection.