The AP3418 from Diodes Incorporated is a DC to DC Converter with Input Voltage 2.5 to 5.5 V, Output Voltage 1 0.6 V, Output Current 1 1500 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for AP3418 can be seen below.