Infineon Technologies IR35217MTRPBF

Overview

IR35217MTRPBF from Infineon Technologies is a dual-loop, 8-phase digital multi-phase buck controller for CPU voltage regulation, supporting Intel® VR13 rev 1.1, VR12.5 rev 1.5, VR12 rev 1.7, IMVP8 rev 1.2, and memory VR modes. It delivers programmable 200 kHz–2 MHz per-phase switching, dynamic phase control, adaptive transient algorithm (ATA), and I²C/SMBus/PMBus telemetry for both loops in a 5×5 mm QFN-40 package.

For engineers reviewing the IR35217MTRPBF datasheet, IR35217MTRPBF pinout, IR35217MTRPBF application, or IR35217MTRPBF equivalent, key selection criteria include dual-loop load-line programmability, per-phase cycle-by-cycle current limiting, ATA-based transient response optimization, and MTP configuration with up to 27 writes - all critical for high-efficiency server and desktop CPU VR designs.

Technical Context

The IR35217MTRPBF implements two independent digital control loops with auto-phase detection and PID coefficient auto-scaling, enabling flexible phase allocation (up to 8 total phases) between loops. It supports DCR and integrated power stage current sensing, with real-time telemetry reporting of voltage, current, temperature, and power via PMBus v1.3-compliant interface.

Its Adaptive Transient Algorithm (ATA) uses proprietary non-linear control to reduce output bulk capacitance requirements, while efficiency shaping features - including dynamic phase add/drop and active diode emulation - maintain high conversion efficiency across light-to-heavy load conditions without external compensation components.

Key Specifications

Pinout & Package

IR35217MTRPBF is housed in a 5 mm × 5 mm, 0.4 mm pitch, 40-pin QFN package with exposed thermal pad (EP). Pin assignment follows Infineon's standard multi-phase controller layout, optimized for low-inductance power stage interfacing and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-loop multi-phase controller applications.

Compared with IR35217MTRPBF, IR35215MTRPBF offers identical silicon but reduced configurability for legacy platforms, while MP2960GQ-Z trades VR13 support and ATA for lower unit cost and simpler firmware integration - making IR35217MTRPBF optimal for next-gen server and overclocked desktop designs demanding full Intel specification compliance and adaptive transient performance.

Availability

IR35217MTRPBF is available at Aetrix Electronics and suitable for server CPU voltage regulation, high-end desktop VR, DDR5 memory subsystems, and AI accelerator power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for IR35217MTRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in digital power controllers and silicon carbide solutions.

The IR35xxx series is Infineon's flagship digital multi-phase controller family designed specifically for high-efficiency, high-density CPU and memory voltage regulation in datacenter servers, enterprise workstations, and AI infrastructure platforms.

FAQ

What is the maximum number of phases supported by IR35217MTRPBF?

The IR35217MTRPBF supports up to 8 total phases, with flexible allocation between its two independent control loops - for example, 6 phases on Loop 1 and 2 on Loop 2, or 4+4 distribution. Phase assignment is fully configurable via PMBus commands or Infineon PowIRCenter GUI and stored in on-chip MTP memory.

Does IR35217MTRPBF require external components to set the load line?

No. The IR35217MTRPBF provides fully digital, programmable load-line control via PMBus registers - eliminating all external resistors or DACs. Both slope and offset are independently adjustable per loop, enabling precise compliance with Intel VR13/VR12.5 specifications without hardware modification.

How does the Adaptive Transient Algorithm (ATA) improve system design?

ATA uses proprietary non-linear control to minimize output voltage deviation during rapid load transients - reducing required bulk capacitance by up to 35% compared to conventional PID-based controllers. This directly lowers BOM cost, PCB area, and system-level ESR/ESL sensitivity while maintaining ±15 mV regulation window under 0→100% CPU load steps.

Is IR35217MTRPBF compatible with VR13-compliant host processors?

Yes. The IR35217MTRPBF is explicitly qualified for Intel VR13 rev 1.1 compliance, supporting full VID table mapping, VRHOT# signaling, and dynamic voltage identification protocols. It also maintains backward compatibility with VR12.5 rev 1.5, VR12 rev 1.7, and IMVP8 rev 1.2 host interfaces without firmware changes.