Smart Power-Stage IC with Integrated Current and Temperature Sensors

The MAX20790 is a feature-rich smart power-stage IC designed to work with Maxim’s controllers to implement a high-density multiphase voltage regulator. Multiple smart power-stage ICs plus a controller provide a compact synchronous buck converter that includes accurate individual phase current and temperature reporting through PMBus™. These smart power-stage devices include fault-protection circuits for overtemperature, VX short, and supply undervoltage lockout (UVLO). The MAX20790 immediately shuts down on fault detection, communicating the FaultID to the controller.

Monolithic integration and advanced packaging technology allow high-switching frequencies with significantly lower losses than conventional implementations. Phase-shedding and discontinuous conduction modes (DCM) optimize efficiency over a wide range of load currents.

The MAX20790 is available in a 12-pin FC2QFN package with an exposed top-side thermal pad (3.25mm x 7.4mm).

Applications

* High Current Multiphase-Voltage Regulators * - Networking ASICs * - AI and Machine Learning ASICs * - Graphics Processors * Servers, Workstations, and Enterprise Storage * Communications and Networking Equipment * AI and Machine Learning

* Space-Optimized Solution

* Monolithic, Smart Power Stage* Phase-Current Steering for Thermal Balance* Small Footprint: ~24mm2

* 95.6% Peak Efficiency

* 6-phase, 400kHz, 12V VIN, 1.8V VOUT

* 300kHz to 1.3MHz Switching Frequency* Telemetry and Fault Reporting through Controller IC PMBus

* Accurate Temperature Monitoring and Reporting* Accurate Per-Phase Current Reporting* FaultID Indicates Type of Fault

* Advanced Self-Protection Features

* Supply and Boost UVLO Protection* Boost Refresh* VX Short and Overtemperature Shutdown* Fast Overcurrent Protection