The HX4004A-MFC with DC-DC Converters Step-Up Fixed 1 2.8V 4.5V 5V Up to 250mA SOT-23-6 RoHS manufactured by HEXIN is an electronic part designed to provide a regulated voltage output from a wide range input, ideal for use in battery applications. This device features an internal oscillator frequency, an error amplifier, a low quiescent current, and a low dropout voltage. It is available in a compact SOT-23-6 package, and has been RoHS compliant. It offers an output voltage of 2.8V, 4.5V or 5V, up to a peak current of 250mA. Other features include over current protection, thermal shutdown protection, and short circuit protection.