The TPS543B25E is a high-efficiency, 18V, 25A, synchronous buck converter. The device employs an internally compensated, fixed-frequency, ACM control architecture, which while always operating under forced continuous conduction mode (FCCM), generates output voltages from 0.5V to 7V. The device is capable of providing high efficiency while operating at a switching frequency up to 2.2MHz, making the device an excellent choice for designs requiring a small design size. The fixed frequency controller can operate from 500kHz to 2.2MHz and can be synchronized to an external clock using the SYNC pin. Additional features include a high accuracy voltage reference, two-wire remote sense, selectable soft-start times, monotonic start-up into prebiased outputs, selectable current limits, adjustable undervoltage lockout (UVLO) through the EN pin, and a full suite of fault protections. The TPS543B25E is available in a small, 2.5mm × 4.5mm, HotRod™ WQFN-FCRLF package.