The NCP45521IMNTWG-H is a synchronous buck-boost LED driver from ON Semiconductor. This device is designed to provide LED lighting solutions for a variety of applications, including portable lighting and general-purpose lighting. It features an integrated buck and boost regulator, a PWM dimming control for 1 channel, and an output current of up to 1 A. It also includes an adjustable output voltage range from 5 V to 45 V, an input voltage range from 4 V to 28 V, and a high-efficiency design. It is available in a 16 pin, 5mm x 5mm WLCSP package.