The 3834-S3.3 from Modular Devices is a DC to DC Converter with Input Voltage 9 to 20 V, Output Voltage 1 3.15 to 3.45 V, Output Current 1 0.06 to 0.6 A, Output Power 2000 mW, Isolation Voltage 500 Vdc. Tags: Through Hole. More details for 3834-S3.3 can be seen below.