LTC3425EUH - A Robust Synchronous Boost Converter from Linear Technology

The LTC3425EUH is a high-performance, synchronous boost converter integrated circuit designed by Linear Technology, now part of Analog Devices, for portable electronic applications. It is housed in a compact 32-lead QFN (5mm x 5mm) package, making it suitable for space-constrained applications.

This advanced power management IC is capable of generating a fixed output voltage of 5V from an input voltage range of 0.5V to 4.5V, making it ideal for single or multiple cell battery-powered applications, as well as for energy harvesting systems. The LTC3425EUH is specifically engineered to provide a high efficiency solution with its synchronous rectification architecture, which reduces power losses compared to asynchronous solutions.

With its internal 2A switches, the LTC3425EUH can deliver output currents up to 800mA with a typical efficiency of up to 94%. This efficiency, combined with a quiescent current of only 25μA, makes the LTC3425EUH an excellent choice for battery-powered devices where extended battery life is crucial.

The LTC3425EUH also features a Burst Mode® operation that further improves efficiency at light loads, reducing the quiescent current to just 15μA. Additionally, the device has a selectable fixed frequency between 300kHz and 2MHz, allowing the use of small surface mount inductors and capacitors. This flexibility helps designers optimize the converter for size, efficiency, or output ripple.

Protection features of the LTC3425EUH include overvoltage protection, thermal shutdown, and a low-battery detector that signals when the input voltage falls below a programmable threshold. This ensures safe operation under a variety of conditions and prolongs the life of the end application.

Overall, the LTC3425EUH from Linear Technology is a versatile and efficient solution for designers looking to maximize battery life in portable devices while minimizing the solution footprint. Its rich set of features and high performance make it a top choice for applications such as handheld instruments, medical devices, and wireless sensors.