The BL8555-28PRA is a Linear Voltage Regulator (LDO) with SOT-23-5 packaging manufactured by the Belling Company. The regulator is designed for low-noise, low-power applications with a maximum power dissipation of 500 mW at 25°C. The device employs improved line and load transient performance, and its output voltage is adjustable from 1.1 V to 27 V by means of a single external resistor. The BL8555-28PRA features protection circuits including reverse input polarity protection, over-current protection, overtemperature protection, and under voltage protection for the load. It has a high ripple rejection ratio of 72 dB, low noise of 35 µVrms, and a wide operating temperature range from -40°C to 125°C. This part is RoHS compliant.