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Infineon Technologies IR35221MTRPBF
- Part No.:
- IR35221MTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IR35221MTRPBF.pdf
- Description:
- IC CTRL XPHASE 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,323
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Product details
Overview
IR35221MTRPBF from Infineon Technologies is an 8-phase dual-loop digital PWM voltage regulator controller for CPU and memory VR applications, supporting flexible phase allocation (e.g., 4+4, 7+1), 194 kHz–2 MHz per-phase switching, PMBus 1.3/AVSBus interface, and IR Adaptive Transient Algorithm (ATA) for reduced bulk capacitance. It operates from +3.3 V supply over –40 °C to +85 °C ambient.
For engineers reviewing the IR35221MTRPBF datasheet, IR35221MTRPBF pinout, IR35221MTRPBF application, or IR35221MTRPBF equivalent, key selection criteria include dual-loop load-line programmability, dynamic phase control, cycle-by-cycle current limiting per phase, AVSBus compatibility, and MTP configuration storage with up to 29 writes.
Technical Context
The IR35221 implements two independent digital control loops with auto-scaled PID coefficients via Auto-Phase Detection, enabling adaptive transient response across varying phase counts. Its dual-loop architecture supports asymmetric phase assignment (e.g., Loop 1: 5 phases, Loop 2: 3 phases) and shared or independent telemetry reporting via I²C/SMBus/PMBus.
It integrates IR Efficiency Shaping features-Dynamic Phase Control, Active Diode Emulation at light loads, and programmable 1-/2-phase operation-alongside hardware-based fault protection including OVP/UVP/OCP/OTP/CFP and cycle-by-cycle current limit per phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 8 total, configurable as dual-loop (e.g., 4+4, 7+1); enables scalable power delivery for CPU/memory rails. |
| Switching Frequency | 194 kHz to 2 MHz per phase; allows optimization of efficiency vs. size for high-current VR designs. |
| PMBus Version | Compliant with PMBus Rev 1.3 and AVSBus; supports dynamic voltage scaling and telemetry in server/memory systems. |
| Load Line | Fully digitized; no external resistors required-reduces BOM count and improves repeatability. |
| Fault Protection | OVP, UVP, OCP, OTP, CFP + cycle-by-cycle current limit per phase; ensures robust system-level safety without external circuitry. |
| MTP Endurance | 29 write cycles for USER section; supports field firmware updates and customer-specific configurations. |
| Operating Temp | –40 °C to +85 °C ambient; qualified for industrial-grade server and embedded computing environments. |
Pinout & Package
IR35221MTRPBF is housed in a 5 mm × 5 mm, 0.4 mm pitch, 40-pin QFN package with exposed thermal pad (EP). Pin functions are defined per Infineon's official datasheet Rev 1.0 (2021-07-15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_1–VIN_8 | Phase input voltage sense | Individual per-phase input voltage monitoring for accurate current calculation and fault detection. |
| ISEN1–ISEN8 | Phase current sense input | Accepts DCR or RDS(on) sensing signals; enables precise per-phase current regulation and limiting. |
| PWM1–PWM8 | Gate drive output | High-speed PWM outputs driving external high-side MOSFETs or PowIRstages; supports 3.3 V tri-state logic. |
| VSEN1 / VSEN2 | Output voltage sense (Loop 1/2) | Differential remote sensing inputs for each loop; critical for tight load-line accuracy and transient response. |
| AVS_SDAT / AVS_MDAT / AVS_CLK | AVSBus interface | Three-wire bus for dynamic voltage/frequency coordination with CPU; replaces legacy VID signaling. |
| TSEN1 / TSEN2 | Temperature sense input | Analog inputs for external NTC thermistors; used for thermal derating and OTP protection per loop. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-loop digital control | Independent PID tuning, telemetry, and fault handling per loop-enables split-rail CPU core/VDDIO or CPU/memory VR architectures. |
| IR Adaptive Transient Algorithm (ATA) | Proprietary non-linear control reduces required output capacitance by >30% versus conventional PID in server VR applications. |
| Dynamic Phase Control | Automatically adds/drops phases based on real-time load current-maintains peak efficiency across 1–100% load range. |
| Active Diode Emulation | Enables synchronous rectifier emulation during discontinuous conduction mode-improves light-load efficiency without external diodes. |
| Programmable cycle-by-cycle current limit | Per-phase current threshold set digitally-eliminates need for external current-limit resistors and improves fault response time. |
Applications
| CPU Core Voltage Regulation | Memory Subsystem VR |
|---|---|
Use Scenario: High-performance x86 or ARM-based server CPUs requiring dynamic voltage scaling under AVSBus control. IC Role / Device Role / Timing Role: Dual-loop controller managing core (VCCIN) and I/O (VCCIO) rails with independent load-line and transient response tuning. Use Value: Enables <10 µs transient recovery with <15 mV droop using only 2× 220 µF ceramic output capacitors per rail. | Use Scenario: DDR4/DDR5 memory modules needing tightly regulated, low-noise VDDQ and VPP supplies. IC Role / Device Role / Timing Role: Dedicated loop configured for memory rail with programmable slew rate and AVSBus-synchronized voltage transitions. Use Value: Reduces memory VR BOM cost by eliminating discrete load-line resistors and simplifies layout with integrated telemetry. |
| AVSBus-Based Systems | Industrial Embedded Computing |
Use Scenario: Data center accelerators (FPGAs, GPUs) coordinating voltage/frequency with host processor via AVSBus. IC Role / Device Role / Timing Role: AVSBus slave device interpreting dynamic voltage commands and reporting real-time power telemetry. Use Value: Eliminates need for separate VID interface ICs; supports sub-10 mV voltage step resolution and <50 µs command latency. | Use Scenario: Fanless edge servers and ruggedized compute platforms operating in extended temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade multi-phase controller with –40 °C to +85 °C qualification and robust fault logging. Use Value: Provides deterministic startup, thermal derating, and fault history storage-critical for unattended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop digital multi-phase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL68127IRZ | 7-phase max, single-loop architecture with optional secondary loop via companion chip; lacks native AVSBus support. | Requires external AVS translator for CPU coordination; limited to ≤7 phases per rail. | Preferred when AVSBus is not required and phase count ≤7; lower gate count but higher system complexity. |
| MP2960AUK-LF-Z | 6-phase max, integrated MOSFET drivers; no MTP user memory; supports only PMBus 1.2. | No AVSBus or dual-loop telemetry separation; less suitable for split-rail CPU VR with independent loop tuning. | Best for cost-sensitive, space-constrained designs where full 8-phase capability and AVSBus are unnecessary. |
Compared with ISL68127IRZ and MP2960AUK-LF-Z, the IR35221MTRPBF uniquely delivers native AVSBus, true dual-loop independence with 8-phase scalability, and MTP-configurable ATA-making it optimal for next-gen server and AI accelerator VR designs demanding minimal output capacitance and dynamic voltage coordination.
Availability
IR35221MTRPBF is available at Aetrix Electronics and suitable for CPU voltage regulation, memory subsystem VR, AVSBus-based systems, and industrial embedded computing requiring stable component supply and long-term lifecycle support.
Supply support for IR35221MTRPBF 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 global R&D and manufacturing infrastructure.
The IR35221 belongs to Infineon's XDPTM digital multi-phase controller family, designed specifically for high-efficiency, high-density server and data center voltage regulation with emphasis on AVSBus interoperability and adaptive transient performance.
FAQ
What is the maximum number of phases supported by the IR35221MTRPBF?
The IR35221MTRPBF supports up to 8 total phases, allocated flexibly between its two independent control loops-for example, 5+3, 4+4, or 7+1. Each phase has dedicated PWM output, current sense (ISEN), and input voltage sense (VIN) pins. Phase count per loop is configured via PMBus commands or MTP settings, and the controller automatically scales PID coefficients during runtime.
Does the IR35221MTRPBF require external components to set the load line?
No. The IR35221MTRPBF provides fully digitized, programmable load line via PMBus or MTP-no external resistors or DACs are needed. Load line slope (ESR) and offset (VOS) are set directly in register space, ensuring repeatable, temperature-stable voltage positioning across production units and eliminating board-level trimming.
Can the IR35221MTRPBF operate with non-Infineon power stages?
Infineon explicitly states interoperability is guaranteed only with OptiMOS™ PowIRstages. While the IR35221MTRPBF can interface with third-party stages via standard gate drive and current sense signals, timing margins, current sensing accuracy, and fault response must be validated by the stage vendor-Infineon does not characterize or support such combinations.
How many times can the MTP memory be reprogrammed?
The IR35221MTRPBF supports up to 29 write cycles for the USER section of its MTP memory. This allows field updates of configuration parameters-including PID coefficients, load line, phase mapping, and telemetry scaling-without requiring full device replacement. Write endurance is specified per Infineon datasheet Rev 1.0 (2021-07-15) and applies to cumulative writes across power cycles.
IR35221MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase3™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Multiphase Controller
- Current - Supply:
- 7mA
- Voltage - Supply:
- 4.75V ~ 7.5V
- Operating Temperature:
- 0°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-MLPQ (5x5)
IR35221MTRPBF FAQ
1.How can I place an order for IR35221MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR35221MTRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IR35221MTRPBF reliable?
The price and inventory of IR35221MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR35221MTRPBF is usually 5 days.
3.What payment methods are accepted for IR35221MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR35221MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR35221MTRPBF?
IR35221MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR35221MTRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IR35221MTRPBF?
For technical support, including IR35221MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR35221MTRPBF requirements.
6.How does Aetrix verify that IR35221MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR35221MTRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IR35221MTRPBF meets industry standards.
7.What is the process for return or replacement of IR35221MTRPBF?
All IR35221MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR35221MTRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IR35221MTRPBF part is unused and in its original packaging.
Return procedure for IR35221MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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