The RB058L-40DDTE25 is a high-frequency, high-quality switching regulator from ROHM. It is a buck type regulator that operates from a wide input voltage range (4V to 40V), and provides an adjustable output voltage of 0.8V to 28V. It has low ripple noise characteristics, low output voltage drop, and fast transient response. The device features overcurrent protection, thermal shutdown protection, and soft start. It is primarily used in battery-powered applications, such as portable audio players, smartphone devices, and handheld power instruments. It is IC-based and comes in a TO-220-5L package.