As AI and high-performance computing continue to evolve, systems are increasingly integrating GPUs, DSPs, and FPGAs to support real-time processing and data-intensive workloads. Applications, such as DSPs in optical modules for AI data center and GPUs in drones are driving demand for high power density solutions.
To address this, Richtek introduces its ACOT® 4-phase synchronous Buck converter family, supporting 3V to 5.5V input and 0.4V to 2.05V output. Housed in a compact WL-CSP2.69x3.92-54(BSC) package, the IC enables a complete solution within a 70mm³ form factor, delivering up to 0.285W/mm³ high power density. Its multi-phase topology reduces ripple, improves efficiency, and ensures fast transient response, ideal for high-current, space-constrained systems.
The RTQ5756 family supports 4 phase operation with various output configurations tailored to system requirements: 1+1+1+1 phase for four outputs, 2+1+1 or 3+1 phase for three outputs, 2+2 or 3+1 phase for dual outputs, and 4-phase single-output, supporting up to 20A output current. The I2C control enables configuration of power-on/off sequencing, watchdog timers, fault detection, dynamic voltage scaling, and slew rate settings, providing high flexibility in system design.
In multi-phase output mode, the device intelligently adapts switching frequency and dynamically manages phase addition or reduction based on load conditions. This Auto Phase Adding/Shedding feature reduces power consumption under light load while ensuring sufficient current delivery under heavy load, maximizing overall efficiency.