How does the dual rail feature work?
A. Fabricated on a CMOS process, these devices operate from two input voltages:Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin is the input voltage which supplies power to the load.The use of an external bias rail allows the part to operate from ultra low Vin voltages, and there by reducing the wasted power loss that would occur converting from a higher voltage.
