Here is a list of part numbers and pin features. PG stands for a power good pin that has a logic high level output when the power supply is in regulation; Sync indicates that the switching frequency is synchronizable to a master clock. UVLO indicates the device has an under voltage lock out feature allowing the device to be programmed to a voltage level at which the device will begin its start up sequence. LSG indicates that the device has a low side MOSFET gate driver to allow an optional low side FET instead of a diode for higher efficiency. An Rt pin allows the frequency to be programmed. Wide input devices are usually designed for a 12 V, 5 V, or 3.3 V output voltages and apply mostly for logic needs. Wide input devices also provide protection from line transients that can come from motors, relays or load dump situations. Industrial applications typically use wide input voltage devices. Mid input voltage devices are designed for FPGA and DSP power from a 12 V rail. Their output voltage can be as low as 0.8 V with tight 1% regulation accuracy. Dual converters have a unique sequencing pin and a selectable current limit on output #2. Many devices are pin compatible for scalability. Scalability is useful when the output current requirement changes suddenly, requiring less redesign.