General Description

The MAX20816 IC provides a high-density, flexible and

scalable dual-loop solution for high-current cores for AI

applications. This dual-loop solution supports up to 16

phases in total, configurable from 16+0 to 8+8 phases

between Rail A and Rail B. Coupled inductors and smart

power-stage ICs are used to implement dual highefficiency

regulators with enhanced transient response.

The complete circuit is a highly efficient (N+M) = 16

multiphase synchronous buck converters with extensive

status and parameter-measurement features. A single,

scalable PCB design with appropriate smart powerstage

IC selection can be used to produce two power

supplies with a wide range of current ratings. PWM

paralleling allows up to 48 phases for very high current

applications.

The IC’s simplified architecture reduces component

count, enables advanced power management and

telemetry, and increases energy savings over the full

load range.

Regulator parameters for protection and shutdown can

be set and monitored through the PMBus™ interface.

Power-stage faults, input and output voltage, input and

output current, input power, and the temperature of the

smart power-stage IC are readable over the serial

interface. The critical fault retention feature prevents

exothermic events after a power-device fault. Preset and

user configurations are programmed in nonvolatile

memory (NVM). MTP-programmable NVM circuits allow

for field modifications. An integrated 3.3V to 1.8V linear

regulator provides the controller bias supply.

The MAX20816 is available in a 56-pin, 7mm x 7mm

TQFN package.

Applications

• NVIDIA GPUs with PWMVID Interface

• AVSBus™ for Fast Dynamic Voltage Transitions

• AI Cores, XPUs, GPUs, Networking ASICs

• High-Current Multiphase Voltage Regulators

• 32ph (2 Parallel) or 48ph (3 Parallel)

Configuration

• Up to 2500A

Benefits and 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

• High-Speed Digital Interface

• PWMVID and AVSBus Support

• 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)

• Advanced Power Management

• Orthogonal Current Rebalance for Phase-Current

Balance During Transients

• Programmable Phase Firing Order

• Protection Features

• Input and Bias Supply Undervoltage Protection

• Overcurrent Protection

• Password Protection