The 5D5.100SMT from Calex Manufacturing is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 5 V, Output Current 1 0.1 A, Output Power 1 W, Output Voltage 2 -5 V. Tags: Surface Mount, Buck-Boost. More details for 5D5.100SMT can be seen below.