TPS7A91

The TPS7A91 is a high-performance low-dropout (LDO) linear regulator manufactured by Texas Instruments, designed for applications requiring precise and stable voltage regulation. It delivers a fixed output voltage of 3.3 V with a maximum output current of 1 A, making it suitable for powering sensitive analog and digital circuits in modern electronic systems. The device features an ultra-low quiescent current of just 40 µA, which enhances efficiency in battery-powered and portable devices where power consumption must be minimized. This LDO incorporates advanced thermal protection and over-current protection mechanisms to ensure reliable operation under adverse conditions. Its wide input voltage range—from 3.6 V to 5.5 V—allows compatibility with various power sources, including single-cell lithium-ion batteries and standard 5 V supply rails. The internal compensation network simplifies design, eliminating the need for external components while maintaining stability across a broad spectrum of load and temperature variations. The TPS7A91 offers excellent line and load regulation, with typical values of 2 mV and 5 mV, respectively, ensuring minimal output voltage deviation even under fluctuating conditions. It also provides fast transient response, crucial for dynamic loads found in microprocessors, FPGAs, and communication modules. With a dropout voltage as low as 180 mV at full load, it efficiently operates from near-regulation input voltages, maximizing energy utilization in low-voltage systems. Designed for robust performance in harsh environments, the TPS7A91 supports operation across a temperature range of –40°C to +125°C, making it ideal for industrial, automotive, and medical applications. Its small 3 mm × 3 mm WSON package enables compact board designs without compromising thermal performance or reliability. The device meets AEC-Q100 qualification standards, further validating its suitability for automotive-grade electronics. In addition to its core regulation function, the TPS7A91 includes a shutdown pin that allows the device to enter a low-power state with less than 1 µA of leakage current, supporting system-level power management strategies. This feature is particularly beneficial in sleep-mode operations of IoT devices, wearable technology, and sensor nodes. The integrated soft-start circuit minimizes inrush current during startup, reducing stress on input capacitors and improving overall system reliability.