The FS1604 Series from TDK Corporation is a DC to DC Converter with Input Voltage 4.2 to 16 V, Output Voltage 1 2.5 to 3.3 V, Output Current 1 0 to 4 A, Operating Temperature -40 to 125 Degree C, Storage Temperature -55 to 150 Degree C. Tags: Surface Mount. More details for FS1604 Series can be seen below.