The GUOXIN JIAPIN SEMICONDUCTOR HT7544-1 is a linear low-dropout (LDO) voltage regulator with a SOT-89 package and is compliant with the Restriction of Hazardous Substances (RoHS) standard. It offers an adjustable output voltage of 1.6 V to 5 V via an external resistor. It has fast transient response, low output voltage ripple and high PSRR. At the same time, it offers an adjustable current-limit protection, internal thermal shutdown, and an open drain output for lowered power dissipation. The HT7544-1 provides a wide operating temperature range from -40°C to 105°C and is suitable for USB digital products, battery-powered systems, and notebook computers.