LM51551QDSSTQ1 – TEXAS INSTRUMENTS

The Texas Instruments LM51551QDSSTQ1 is a 12V, 1A synchronous step-down converter in a compact 6-pin WSON package. It features a wide input voltage range of 4.5V to 18V, enabling its use in diverse applications with fluctuating supply voltages. The device boasts high efficiency, typically exceeding 90% at its nominal output, minimizing power loss and extending battery life in portable devices. Internal compensation simplifies design, requiring minimal external components, reducing board space and complexity. Its switching frequency is programmable between 300kHz and 1.5MHz, allowing designers to optimize EMI performance and component selection._x000D_
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The LM51551QDSSTQ1 incorporates features crucial for robust operation, including short-circuit protection, over-temperature shutdown, and input undervoltage lockout. Its adjustable output voltage, achieved via a single resistor, provides design flexibility. Common applications include powering low-voltage peripherals in automotive systems, industrial control circuits requiring regulated voltages, and portable devices demanding high efficiency. Its small footprint and integrated protection mechanisms make it an ideal choice for space-constrained and reliability-critical designs, offering a compelling alternative to larger, less integrated solutions. The device’s Q1 suffix denotes its qualification to AEC-Q100 standards, ensuring robust operation in automotive applications.