The PH100A280-5 from TDK Corporation is a DC to DC Converter with Input Voltage 4 to 6 V, Output Voltage 1 5 V, Output Current 1 20000 mA, Output Power 100000 mW, Operating Temperature -40 to 85 Degree C. Tags: Through Hole, Buck-Boost. More details for PH100A280-5 can be seen below.