The LT3973IDD-3.3PBF is an LED driver IC from Analog Devices. It is a switching mode pulse width modulation (PWM) LED driver that can drive two LED channels with output current ratings up to 1A. It features adjustable LED switching frequency up to 1MHz, a low dropout voltage of less than 120mV, and a wide input voltage range from 2.9V to 42V. It contains an internal power MOSFET, linear regulator, and PWM control logic. It also offers a soft-start and an adjustable frequency without requiring external components. The LT3973IDD-3.3PBF also features low quiescent current, current monitoring, and output overvoltage protection. It is available in a 8-lead thermally enhanced narrow body MSOP package.