TPS54239DDAR – TEXAS INSTRUMENTS

The TPS54239DDAR is a 40V, 3A synchronous step-down converter from Texas Instruments, packaged in a thermally enhanced 20-pin QFN (4x4mm) package. It utilizes a hysteretic control architecture for fast transient response and minimal output voltage ripple, making it ideal for applications requiring tight voltage regulation under dynamic load conditions. Its input voltage range spans 4.5V to 40V, enabling flexibility in various power supply designs. The device features integrated high-side and low-side MOSFETs, eliminating the need for external components and simplifying the bill of materials. Efficiency typically exceeds 90% across its operating range, contributing to reduced power loss and improved thermal performance._x000D_
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Key features include programmable output voltage via an external resistor divider, enabling custom voltage rails, and soft-start functionality to minimize inrush current. Protection features encompass cycle-by-cycle current limiting, over-temperature shutdown, and output over-voltage protection, enhancing system robustness. Common applications include intermediate bus conversion in distributed power architectures, powering high-performance microprocessors, and powering high-current loads requiring precise voltage regulation in industrial and automotive applications. The TPS54239DDAR’s high efficiency, compact size, and robust protection features make it a strong contender for space-constrained and high-reliability designs.