The LT3477EFE#PBF is a versatile switching voltage regulator manufactured by Analog Devices. It is a 3A, 42V, 3MHz Step-Up Regulator, suitable for use in high efficiency, low power applications such as LED lighting, USB power applications, and battery charging. The device features a wide input voltage range of 2.5V to 42V, a built-in power switch with 3A peak current capability, a wide operating frequency range of 700kHz to 4MHz, and a highly accurate voltage loop response with ±1% reference accuracy. Additionally, the device also offers an optional programmable power save mode for improved efficiency at light loads, and a low profile 0.75mm x 1.25mm QFN-20 package for improved scalability. With its excellent combination of performance, features, and scalability, the LT3477EFE#PBF is an ideal choice for powering LEDs and many other applications.