The 3835-S3.3 from Modular Devices is a DC to DC Converter with Input Voltage 9 to 20 V, Output Voltage 1 3.1 to 3.4 V, Output Current 1 0.45 to 4.5 A, Output Power 15000 mW, Isolation Voltage 500 Vdc. Tags: Through Hole. More details for 3835-S3.3 can be seen below.