The STBB2 from STMicroelectronics is a DC to DC Converter with Input Voltage 2.4 to 5.5 V, Output Voltage 1 1.2 to 4.5 V, Output Current 1 800 mA, Operating Temperature 150 Degree C, Storage Temperature -40 to 150 Degree C. Tags: Surface Mount, Buck-Boost. More details for STBB2 can be seen below.