The A7531 Series from AiT Semiconductor is a DC to DC Converter with Input Voltage 0.8 to 6 V, Output Voltage 1 2.5 to 6 V, Output Current 1 23 to 31 mA, Output Power 250 mW, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Boost/Step Up. More details for A7531 Series can be seen below.