TPS2551QDBVRCT – TEXAS INSTRUMENTS

The TPS2551QDBVRCT is a Texas Instruments single-channel, 4A synchronous buck converter in a compact 6-pin WSON package. Optimized for high-efficiency power conversion in portable applications, it operates from a 4.5V to 18V input voltage range and provides a highly adjustable output voltage down to 0.8V, programmable via an external resistor divider. Its internal 4A switch and integrated synchronous rectifier minimize power loss, yielding efficiencies exceeding 90% across its operating range. The device features a selectable switching frequency of 1MHz or 1.5MHz for flexible PCB layout optimization and reduced external component count. Soft-start functionality minimizes inrush current, crucial for sensitive systems. Protection mechanisms include overcurrent, overtemperature, and undervoltage lockout, enhancing system reliability. Typical use cases include powering high-current peripherals in battery-powered systems, providing regulated voltage rails for microcontrollers and other ICs, and powering LED lighting circuits requiring precise current control. The TPS2551QDBVRCT’s small footprint, high efficiency, and robust protection features make it a compelling choice where space and power efficiency are paramount.