Synchronous step-down converter optimized for high performance applications

Texas Instruments LMS3655 synchronous buck regulators are optimized for high performance applications. They provide an adjustable output of 1V to 15V. Seamless transition between PWM and PFM modes, along with a low quiescent current, ensures high efficiency and superior transient responses at all loads. Advanced high speed circuitry allows the device to regulate an input of 24V to an output of 3.3V at a fixed frequency of 400kHz while also enabling a continuous load current of 5.5A. An innovative frequency foldback architecture allows this device to regulate a 3.3V output from an input voltage of only 3.5V. The input voltage can range up to 36V, with transient tolerance up to 42V, easing input surge protection design. An open-drain reset output, with built-in filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space.