The Sifirst SF5533LGT is a switching controller with SOT26 RoHS package. This device is a low-power, low-voltage, single-channel power switching controller that is designed to provide high-efficiency control in space-constrained applications. It features a current limit of up to 1.2A, a PWM mode with dead time of up to 4ms, and a UVLO condition of 5.5V. Other features include a frequency range up to 5kHz, start-up with SOFT-start, and a thermal shutdown. The SF5533LGT is RoHS compliant and is suitable for applications such as battery charging, DC/DC converters, and charging adaptors.