The PEP1-S5-D3-M from CUI is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 3.3 V, Output Current 1 151 mA, Output Power 1000 mW, Output Voltage 2 -3.3 V. Tags: Surface Mount, Buck-Boost. More details for PEP1-S5-D3-M can be seen below.