The PES1-S3-S5-M from CUI is a DC to DC Converter with Input Voltage 2.97 to 3.63 V, Output Voltage 1 5 V, Output Current 1 200 mA, Output Power 1000 mW, Isolation Voltage 3000 VDC. Tags: Surface Mount, Boost/Step Up. More details for PES1-S3-S5-M can be seen below.