The LOWPOWER LP3985-28B3F is a SOT23-3 package, RoHS-compliant 3-terminal low dropout (LDO) regulator with a fixed output voltage of 28V. It is capable of delivering up to 500mA of output current with low ripple and low noise. The LP3985-28B3F features an input voltage range from 4.5V to 28V and an output voltage accuracy of ±1.5%. It has a low dropout voltage of 600mV at 500mA and 1V at 100mA. The LP3985-28B3F also features low power consumption, no minimum load current requirement, low output voltage noise, current limit and thermal shutdown protection, and fast start up time with minimal output voltage overshoot. The LP3985-28B3F is suitable for a wide range of low power and low noise applications requiring precise voltage regulation.