TS19451CY is a step-down DC/DC controller IC from Taiwan Semiconductor. It is part of the RMG (Reduced-Height Multi-Mode) family and provides an efficient, high-efficiency, and compact solution for a variety of applications such as power converters, power supplies, and power sequencing. It is ideal for applications where high-efficiency and space requirements are paramount. It accepts an input voltage range of 3V to 30V, and has a 3A2O output current. The TS19451CY also has programmable frequency, soft-start function, and enable/disable control options.