Infineon IR35401MTRPBF: A 40A Integrated Voltage Regulator with PMBus Interface

In the relentless pursuit of higher efficiency, power density, and intelligent management in modern computing and telecommunications systems, the Infineon IR35401MTRPBF stands out as a premier solution. This fully integrated voltage regulator (IVR) represents a significant leap forward by combining a high-performance 40A power stage with a digital PMBus interface in a single, compact package.

The core strength of the IR35401MTRPBF lies in its high level of integration. Unlike traditional multiphase controller + DrMOS solutions, this IVR consolidates the PWM controller, drivers, power MOSFETs, and inductors into a single module. This dramatically simplifies the PCB design process for engineers, reducing the bill of materials (BOM) and board space requirements. The result is a highly efficient and dense power delivery solution, capable of delivering a continuous 40A output current from a single unit with minimal external components. Its advanced packaging and thermal design ensure reliable operation even under demanding load conditions.

A defining feature of this regulator is its integrated digital PMBus 1.2 interface. This transforms power management from a static, hardware-configured task into a dynamic, software-defined one. Through this two-wire serial bus, system designers can:

Precisely monitor key parameters in real-time, including output voltage, output current, temperature, and input power.

Remotely configure critical settings such as output voltage margining, switching frequency, and fault thresholds.

Enhance system reliability with comprehensive telemetry and programmable fault management for conditions like over-current, over-voltage, and over-temperature.

This intelligence allows for optimized system performance, advanced power sequencing, and predictive health monitoring, which are crucial for complex servers, networking equipment, and storage applications.

The device operates from a wide input voltage range of 4.5V to 16V, making it suitable for a variety of intermediate bus architectures, particularly those powered by 12V or 12V battery sources. It employs Infineon's proprietary OptiMOS™ technology, which is renowned for its exceptional efficiency, contributing to lower energy losses and reduced thermal dissipation.

ICGOODFIND: The Infineon IR35401MTRPBF is a benchmark in power integration and digital control. It successfully addresses the critical industry challenges of space savings, design simplification, and intelligent power management. By merging a robust 40A power train with a versatile PMBus interface, it provides a future-proof foundation for building efficient, reliable, and data-rich power systems in next-generation data-centric applications.

Keywords: PMBus Interface, Integrated Voltage Regulator, 40A Output Current, Power Management, Infineon OptiMOS™.