Infineon Technologies IR35215MTRPBF

Overview

IR35215MTRPBF 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, with programmable switching frequency (200 kHz–2 MHz per phase), adaptive transient algorithm (ATA), and integrated I²C/SMBus/PMBus telemetry for both loops.

For engineers reviewing the IR35215MTRPBF datasheet, IR35215MTRPBF pinout, IR35215MTRPBF application, or IR35215MTRPBF equivalent, key selection criteria include dual-loop load-line programmability, dynamic phase control, cycle-by-cycle current limiting per phase, fault protection coverage (OVP/UVP/OCP/OTP/CFP), and MTP configuration storage with up to 27 writes.

Technical Context

The IR35215 implements two independent digital PID control loops with auto-scaling coefficients and auto-phase detection, enabling flexible allocation of up to eight total phases between V_CORE and V_GT/memory rails. Its Adaptive Transient Algorithm (ATA) uses non-linear control to reduce output capacitance requirements while maintaining tight voltage regulation during load steps.

It supports DCR- and integrated power stage current sensing, delivers real-time telemetry (voltage, current, temperature, power) via PMBus v1.3, and features multiple time-programmable (MTP) memory with separate USER and FACTORY sections-27 write cycles for user configuration, no external load-line components required.

Key Specifications

Pinout & Package

IR35215MTRPBF is housed in a 5 mm × 5 mm, 40-pin QFN package with 0.4 mm pitch and exposed thermal pad. The package supports +3.3 V supply and operates from −40°C to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR35204MTRPBF and MP8765GQ-Z, the IR35215MTRPBF uniquely delivers dual independent digital loops, memory VR mode, and full PMBus telemetry - essential for server-class CPU and GPU power architectures requiring coordinated rail management and telemetry-driven thermal/power optimization.

Availability

IR35215MTRPBF is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VR development, and AI accelerator power subsystem integration requiring stable component supply, long-term lifecycle support, and qualified industrial-grade reliability.

Supply support for IR35215MTRPBF 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 MCUs, and industrial control ICs, with global R&D centers and ISO/TS 16949-certified manufacturing.

The IR35215 belongs to Infineon's PowIR series of digital multiphase controllers, designed specifically for high-efficiency, high-density CPU and memory voltage regulation in datacenter and enterprise computing platforms.

FAQ

What is the maximum number of phases supported by the IR35215MTRPBF?

The IR35215MTRPBF supports up to eight total phases, with flexible allocation between its two independent control loops - for example, 6 phases on V_CORE and 2 on V_GT, or 4+4 split. Phase assignment is fully configurable via PMBus commands or PowIRCenter GUI, and auto-phase detection adjusts active phases dynamically based on load current.

Does the IR35215MTRPBF require external components to set the load line?

No. The IR35215MTRPBF provides fully digital, per-loop load-line programming via PMBus registers - eliminating all external resistors or DACs. Slope and offset values are stored in on-chip MTP memory, enabling precise VR13/VR12.5/IMVP8 compliance without board-level trimming or component variation impact.

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

The ATA uses proprietary non-linear control to predict and pre-empt load transients, reducing output voltage deviation by up to 40% versus conventional PID. This allows fewer and smaller ceramic capacitors - typically ≤12× 220 μF - while meeting Intel's ±3% V_OUT specification under 50 A/μs load steps in server CPU applications.

Can the IR35215MTRPBF operate with both DCR and integrated power stages?

Yes. The IR35215MTRPBF natively supports current sensing via either DCR of external inductors or integrated current-sense outputs from compatible power stages like Infineon's TDA21472. It automatically calibrates gain and offset for each method, ensuring accurate current reporting and cycle-by-cycle limiting regardless of sensing topology.