Model LT3663, 1.2 A, 1.5 MHz monolithic current mode step-down switching regulator with programmable output current limit. Its wide operating input voltage of 7.5 V to 36 V makes regulator ideal for variety of input sources, including unregulated 12 V wall adapters, 24 V industrial supplies, Fire Wire, as well as automotive applications. Onboard input overvoltage lockout protects device through input transients as high as 60 V, such as those commonly found in automotive applications.