Southchip announced the release of SD13050, a 22V/60A high-current DrMOS, alongside SD22442, a dual-rail four-phase controller, delivering efficient and reliable power solutions for CPU/GPU/SOC and other compute chips. Both products are available in industrial-grade and AEC-Q100 Grade 1-certified automotive-grade versions, covering a wide range of computing scenarios from data centers and edge servers to autonomous driving.

AI compute build-out has entered a phase of rapid acceleration. The fast-paced iteration of large language model training, autonomous driving, and industrial AI is driving exponential growth in compute demand. According to industry projections, global AI server shipments are expected to reach approximately 3.7 million units in 2026, representing year-on-year growth of 51.3%.

What the AI compute boom brings is not only a surge in chip power consumption, but also a multiplicative increase in current demand. Against this backdrop, the low-voltage, high-current multiphase controller + DrMOS architecture – with its ability to support higher currents, superior transient response, and greater efficiency – has become the mainstream power delivery solution for high-performance compute chips. This architecture is poised to expand from high-end servers into general-purpose AI servers and edge computing, unlocking even broader growth opportunities.

DrMOS integrates the driver and power MOSFETs into a single package through multi-chip or single-die integration, delivering smaller footprint, lower parasitic inductance, faster switching speeds, and reduced power losses. It also simplifies PCB layout and enhances thermal management, making it particularly well-suited for high-density power applications with stringent space and efficiency requirements. Among these approaches, the single-die solution facilitates integration into VRM modules for future vertical power delivery architectures, preserving greater headroom for next-generation compute chip power supply designs. By paralleling multiple DrMOS phases, the current capability for compute chips scales linearly, but control complexity grows exponentially. The multiphase controller is central to addressing this challenge – it communicates with the host processor and dynamically distributes output across phases, enabling precise, coordinated control of the entire power system.

Southchip's CPU/GPU power solution (SD13050 + SD22442) supports a 5V-16V input bus and dual voltage rail outputs, with flexible phase allocation per rail to accommodate different power level requirements. SD22442 supports DCM (Discontinuous Conduction Mode) and APS (Active Phase Shedding), which, combined with SD13050's high-precision ZCD current sensing, significantly improves system efficiency under light-load conditions.

As the energy conversion core of the solution, SD13050 delivers up to 60A of continuous output current in an ultra-compact 5mm*6mm LGA package, while maintaining high efficiency across the full load range, along with high-precision sensing and comprehensive protection mechanisms. Through optimized dead-time control and parasitic inductance suppression, SD13050 sustains high efficiency under all load conditions. In addition, it integrates high-precision inductor current sensing and temperature monitoring, providing real-time fault protection data to the four-phase controller. A rich set of built-in protection features effectively prevents over-discharge of the bootstrap capacitor, ensuring system reliability at high switching frequencies.

SD22442 serves as the command center of the solution, housed in a 6mm*6mm QFN package, supporting flexible configuration of up to four phases across two independent voltage rails. Its core differentiators are comprehensive digital control capability and broad interface compatibility: support for both PWMVID and PMBus communication protocols enables flexible adaptation to power management specifications from different processor platforms. An integrated MTP memory supports secure storage and recall of user-defined configurations. The automotive-grade SD22442Q complies with ISO 26262 ASIL-B functional safety level, providing a robust safety foundation for autonomous driving systems with stringent reliability requirements.