The LT3474-1 from Analog Devices is a LED Driver IC with Input Voltage 4 to 36 V, Output Current 1000 mA, Number of Output 1, Switching Frequency 200 to 2000 KHz, Operating Temperature Range -40 to 85 Degree C. Tags: Surface Mount, DC-DC LED Driver. More details for LT3474-1 can be seen below.