The LT8705 is a very high efficiency (Up to 98%) 4-switch synchronous buck-boost DC/DC controller that operates over a wide 2.8V to 80V input range and can produce a fixed output between 1.3V to 80V. Output power up to 250W typically can be delivered with a single device. Higher power can be achieved when multiple circuits are paralleled. The input voltage and current loops can prevent overloading of a high impedance input source such as a solar panel. The output current feedback loop provides an easy solution for regulated output current applications such as a battery charger. The operating frequency is selectable between 100kHz and 400kHz, and can be synchronized to an external clock. The LT8705 employs a proprietary current-mode control architecture for constant frequency operation in buck or boost mode and has powerful onboard quad N-channel MOSFET gate drivers. The user can select from forced continuous, discontinuous and Burst Mode® operation to maximize light load efficiency. Additional features include adjustable soft-start, an onboard die temperature monitor and ±1% reference voltage accuracy over an operating junction temperature range of -40°C to 125°C. The LT8705 is available in a 38-pin, 5mm x 7mm QFN and a 38-lead TSSOP package with additional pin spacing for high voltage operation.