Smart Slave IC with Integrated Current and Temperature Sensors

The MAX20766 is a feature-rich smart slave IC designed to work with Maxim’s seventh-generation controller to implement a high-density multiphase voltage regulator. Up to six smart slave ICs, plus a controller IC, provide a compact synchronous buck converter that includes accurate individual phase-current and temperature reporting through SMBus/PMBus™. This smart slave device includes protection circuits for overtemperature, VX short, and all power-supply UVLO faults. If a fault is detected, the slave IC immediately shuts down and sends a fault signal to the controller IC.

Monolithic integration and advanced packaging technologies allow practical per-phase, high-switching frequencies with significantly lower losses than alternative implementations. Smart slave ICs are designed to support phase shedding and DCM modes for efficiency optimization over a wide range of load currents. High per-phase current- capability designs with low COUT enable a design with fewer phases and a smaller footprint.

The MAX20766 is available in a 16-pin FCQFN package with exposed top-side thermal pads. Top-side cooling improves heat transfer to ambient and reduces PCB and component temperatures.

Applications

* Communication and Networking Equipment * FPGAs * High-Current Voltage Regulators * Memory * Microprocessor Chipsets * Networking ASICs * Servers and Storage Equipment

* Increased Power Density with Fewer External Components

* Monolithic Integration for Reduced Parasitics

* Scalable Architecture Compatible with Coupled Inductors

* 94% Peak Efficiency

* Top-Side Cooling for Improved Heat Transfer to Ambient

* Accurate Real-Time Telemetry of Critical Parameters

* PMBus-Compliant Interface through the Controller IC for Telemetry and Power Management

* Junction Temperature Monitoring and Reporting

* Per-Phase Current Reporting

* Advanced Self-Protection Features for the System and IC

* Overcurrent Protection

* Overtemperature Protection

* Boost Voltage UVLO

* VX Short Protection,