The WL2836D25-4/TR with UDFN-4-EP(1x1) is a Linear Voltage Regulator (LDO) from Will Semiconductor that is compliant with restrictive RoHS (Restriction of Hazardous Substances) regulations. It is a (Low Drop Out) LDO, meaning that it can function with input voltages as low as a few hundred millivolts, and can even regulate voltages slightly lower than input voltages. It has an adjustable output that can be programmed from 0.8V to 6v, making it a very versatile device. The device has a maximum current output of 250mA, and has an extremely low voltage dropout rate of 25mV. It also has a high operating temperature of -40 to +125°C, making it suitable for use in a variety of high temperature settings. In terms of safety considerations, the device is protected against short-circuits, over-voltage and overload.