Sparkfun Pololu Step-Down Voltage Regulator - 8.4V, 5A

The Pololu D42V55F8 is a compact, efficient synchronous step-down (buck) switching regulator designed for applications requiring input voltages from 8.4V to 60V. It delivers a stable 8.4V output at up to 5A, optimizing energy use and minimizing heat production. With an efficiency range of 80% to 95% depending on load and voltage differential, this regulator is ideal for high-difference voltage applications. It operates at a switching frequency of around 400 kHz under heavy loads and features an ultra-low quiescent current of less than 0.2 mA when idle.

Perfect for powering devices from a higher voltage source, this regulator is suitable for robotics projects, battery-powered devices, and other electronics requiring efficient voltage conversion. Its robust design ensures reliable performance in demanding conditions, making it a versatile choice for both hobbyists and professionals.

The module includes several built-in features such as an enable (EN) input for low-power shutdown, a power-good (PG) output for monitoring and sequencing, and a soft-start function to limit inrush current. Additionally, it offers protection against reverse voltage, over-current, and over-temperature, ensuring the safety and longevity of your projects.

Measuring just 25.4 mm × 25.4 mm × 9 mm, this regulator is compact and easy to integrate into various setups. It includes three mounting holes compatible with #2 or M2 screws and provides six 2.54 mm grid-compatible connections for seamless prototyping. The duplicated power rails further simplify the design process, offering flexibility and convenience for your electronic needs.