XP Power - SR Series of Switch Regulators. The SR series from XP Power offers a highly reliable range of 0.5 Amp and 1 Amp, 3-pin SIP 3T switching regulators. The series has been designed in an industry standard package, features continuous short circuit protection and a high efficiency of up to 97%. These compact switching regulators have a wide input and an operating temperature from -40°C to +80°C. Industry standard package Continuous short circuit protection Wide input range -40°C to +80°C Operating temperature Efficiency up to 97% Pin compatible with LM78MXX