The PT4119EE89E is a 5-pin SOT-89-5 RoHS LED Driver manufactured by CR-PowTech. It is a DC/DC driver IC designed to drive high and low-side LEDs. It provides non-synchronous buck regulation, which allows the user to adjust the brightness and current of the LEDs connected to it. The PT4119EE89E has a wide operating voltage range of 3.0V to 16V and the output current can be adjusted from 0.5 mA to 15mA. The device also features PWM control, under voltage lockout, and output short-circuit protection for improved reliability.