4A Step-Down-Regulator
The is a 4A step-down regulator with integrated MOSFETs placed in a space saving QFN12 2mm x 2mm package for today’s mobile devices. It uses an ultra fast constant frequency hysteretic control method and a high switching frequency to minimize external filter components while maintaining excellent regulation. At lower currents, the switching frequency is lowered Power Saving Mode or PSM to optimize light load efficiency and extend battery life. The LX7176A has a fixed 0.6V reference, Power Good, and Enable pins. The LX7176A operates from 3V to 5.5V rails. Cycle-by-cycle current limiting protects against over-current conditions. The LX7176A operates in hiccup mode to further enhance the robustness of the converter for heavy over-load or short-circuit faults and it automatically recovers once the fault clears. Thermal protection will shut down the regulator under over-temperature conditions and over voltage conditions will immediately shut off the output to protect against permanent damage.