The PAM2401 from Diodes Incorporated is a DC to DC Converter with Input Voltage 0.9 to 4.75 V, Output Voltage 1 2.5 to 5 V, Output Current 1 3 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -65 to 125 Degree C. Tags: Surface Mount, Boost/Step Up. More details for PAM2401 can be seen below.