Analog Devices Inc. MAX20816 High-Current PWMVID/AVSBus Controllers
Analog Devices MAX20816 High-Current PWMVID/AVSBus Controllers are highly integrated, dual‑output multiphase power management solutions designed to meet the extreme current and dynamic voltage requirements of modern Artificial Intelligence (AI), GPU, and high‑performance computing platforms. The ADI MAX20816 ICs feature a flexible dual‑loop architecture that supports up to 16 total phases, configurable from 16+0 to 8+8 between two independent rails, enabling efficient power delivery to multiple high‑current cores from a single controller.
By using coupled inductors and smart power‑stage ICs, the MAX20816 implements high‑efficiency synchronous buck regulators with fast transient response, while PWM paralleling allows scaling up to 32 or 48 phases for applications requiring currents as high as 2500A. The controller supports high‑speed digital voltage control through PWMVID and AVSBus interfaces, well-suited for fast dynamic voltage transitions in NVIDIA GPUs, AI cores, XPUs, and networking ASICs.
Advanced telemetry and power management features are accessible via PMBus, allowing real‑time monitoring of voltages, currents, input power, and power‑stage temperature, along with fault logging and protection configuration. Integrated nonvolatile memory enables preset and user‑defined configurations, while built‑in fault retention helps prevent catastrophic events after power‑stage failures. With high power density, top‑tier efficiency, and comprehensive digital control/monitoring capabilities, the ADI MAX20816 provides a scalable and robust solution for next‑generation high‑current multiphase voltage regulation.
Features
- High-power density and efficiency
- Smart power-stage support
- Top-tier efficiency - 90.71% peak efficiency at 0.75VOUT
- Integrated output power monitor
- 16-ph N+M dual-loop multiphase architecture
- Telemetry through PMBus
- Digitally programmable configuration
- Input voltage, current, and power monitoring
- Power-stage temperature monitoring and reporting
- Fault, command, and data logging (black box feature)
- Digital GPIO (OCP, OTW, VR settled indicators)
- High-speed digital interface - PWMVID and AVSBus support
- Advanced power management
- Orthogonal current rebalance for phase-current balance during transients
- Programmable phase firing order
- Protection
- Input and bias supply undervoltage protection
- Overcurrent protection
- Password protection
- 56-pin, 7mm x 7mm TQFN package
Applications
- NVIDIA GPUs with PWMVID interface
- AVSBus™ for fast dynamic voltage transitions
- AI cores, XPUs, GPUs, and networking ASICs
- High-current multiphase voltage regulators
- 32ph (2x parallel) or 48ph (3x parallel) configuration
- Up to 2500A
Typical Operating Circuit
