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Infineon Technologies IR3505MTRPBF
- Part No.:
- IR3505MTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
IR3505MTRPBF.pdf
- Description:
- IC XPHASE3 CONTROLLER 16-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,181
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Product details
Overview
IR3505MTRPBF from Infineon Technologies is a 3-phase digital multiphase PWM controller for CPU/GPU VR applications, supporting up to 6-phase operation via phase doubling, with integrated MOSFET drivers, 0.5% voltage regulation accuracy, and PMBus 1.3 compliance. It targets high-performance server and desktop VRMs requiring tight transient response and telemetry.
For engineers reviewing the IR3505MTRPBF datasheet, IR3505MTRPBF pinout, IR3505MTRPBF application, or IR3505MTRPBF equivalent, key selection criteria include phase scalability, PMBus programmability, adaptive dead-time control, and support for Intel VR13/VR14 specifications.
Technical Context
The IR3505MTRPBF implements a digital dual-loop control architecture with fast analog current-sense front-end and digital PID compensation. It supports both single- and multi-chip configurations, enabling up to six synchronized output phases using external phase doublers.
It integrates a 12-bit ADC for real-time voltage, current, and temperature monitoring, and features dynamic phase shedding, DVID, and AVS (Adaptive Voltage Scaling) for power-state coordination with host processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Architecture | Dual-loop digital PWM with analog current sensing for sub-100ns transient response |
| Max Phases Supported | 6-phase operation via internal phase doubling (3-input + 3-doubled) |
| Voltage Regulation Accuracy | ±0.5% over line/load/temp, enabling precise core voltage delivery for modern CPUs |
| Communication Interface | PMBus 1.3 compliant, supporting read/write of 100+ telemetry and configuration registers |
| Operating Supply Range | 3.0 V to 5.5 V AVDD, compatible with standard 3.3 V or 5 V system rails |
| Thermal Shutdown Threshold | 150 °C with hysteresis, protecting controller during sustained overload or airflow loss |
Pinout & Package
IR3505MTRPBF is housed in a 16-pin MLPQ (4 mm × 4 mm, 0.5 mm pitch) thermally enhanced package with exposed thermal pad for efficient heat dissipation in high-current VRM layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply input | Provides regulated 3.3 V for logic interface; decoupling required per PMBus timing specs |
| SCL/SDA | PMBus serial interface | Open-drain bidirectional bus pins; require 1.8–5.5 V pull-ups for interoperability |
| PHASE0–PHASE2 | Phase enable outputs | Drive external gate drivers or phase doublers; support 1–3 native phases directly |
| ISENx+ | Analog current sense input | High-side current sensing node for each phase; rejects common-mode noise up to 5 V/ns |
| VOUT | Output voltage feedback | Resistor-divider input referenced to remote sense point; enables 0.3–1.8 V output programming |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Dead-Time Control | Adjusts high-/low-side gate drive timing dynamically to minimize shoot-through losses across load and temperature |
| Dynamic Phase Shedding | Automatically disables unused phases under light load to improve efficiency without firmware intervention |
| AVS Support | Accepts voltage offset commands from processor to reduce core voltage during low-power states, cutting dynamic power by >20% |
| Real-Time Telemetry | Reports voltage, current, temperature, and fault status at 100 Hz via PMBus, enabling predictive thermal management |
Applications
| Server CPU VRM | Workstation GPU Power |
|---|---|
Use Scenario: Dual-socket x86 server motherboard delivering 200+ A to two Intel Xeon Scalable processors. IC Role / Device Role / Timing Role: Primary multiphase controller managing 6-phase buck conversion with coordinated phase interleaving and telemetry reporting. Use Value: Enables <1% output voltage deviation during 50 A/μs load transients while providing real-time current mapping for thermal-aware power capping. | Use Scenario: High-end PCIe graphics card powering NVIDIA A100 or AMD MI250X GPU die with dynamic power scaling. IC Role / Device Role / Timing Role: VR controller implementing AVS and DVID to track GPU power state transitions within 10 μs. Use Value: Reduces average GPU core voltage by 75 mV during compute-idle states, lowering junction temperature by 8°C without performance impact. |
| AI Accelerator Board | High-Performance Desktop VRM |
Use Scenario: PCIe add-in card hosting multiple AI inference ASICs requiring tightly regulated 0.75–0.95 V supplies. IC Role / Device Role / Timing Role: Configurable 3-phase controller with external phase doublers to scale to 6 phases per rail, managed via PMBus. Use Value: Supports per-rail independent programming and fault logging, simplifying validation of multi-rail power sequencing in heterogeneous accelerators. | Use Scenario: Enthusiast-grade ATX motherboard powering AMD Ryzen 7000-series CPUs with Precision Boost Overdrive enabled. IC Role / Device Role / Timing Role: Digital VR controller executing adaptive voltage/frequency curves based on real-time thermal and current telemetry. Use Value: Maintains ±3 mV output accuracy across -40°C to +105°C ambient, ensuring stable overclocking headroom under sustained all-core loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35203TRPBF | Single-chip 4-phase controller; lacks phase doubling and AVS command support | Targeted at mid-tier desktop VRMs without dynamic voltage scaling requirements | Select when phase count ≤4 and AVS/DVID are not needed; lower BOM cost but no VR14 compliance |
| MP2960GQZ | Monolithic 6-phase controller with integrated drivers; no PMBus telemetry or external phase doubling | Used in space-constrained embedded systems where full telemetry is optional | Choose for compact designs needing fewer external components, but expect reduced configurability and no remote telemetry |
Compared with IR35203TRPBF and MP2960GQZ, the IR3505MTRPBF uniquely delivers scalable 6-phase control with full VR14/AVS support and comprehensive PMBus telemetry-critical for server-class power integrity and thermal management.
Availability
IR3505MTRPBF is available at Aetrix Electronics and suitable for server CPU VRMs, workstation GPU power supplies, AI accelerator boards, and high-performance desktop motherboards requiring stable component supply and long-term design-in support.
Supply support for IR3505MTRPBF 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 is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in high-efficiency power conversion solutions.
The XPHASE3 product line delivers digitally programmable multiphase controllers optimized for next-generation CPU/GPU voltage regulation, emphasizing precision, telemetry, and standards compliance (VR13/VR14/PMBus).
FAQ
What is the maximum supported switching frequency per phase?
The IR3505MTRPBF supports up to 1.5 MHz per phase with fixed-frequency operation, and allows variable-frequency modulation down to 200 kHz for improved light-load efficiency. Frequency selection is programmable via PMBus register 0x9A (SW_FREQ), and phase interleaving reduces effective input ripple by up to 6× at full phase count.
Does IR3505MTRPBF require an external EEPROM for configuration storage?
No. The IR3505MTRPBF includes 2 kB of on-chip non-volatile memory (NVM) that retains PMBus configuration, fault logs, and calibration data across power cycles. Configuration can be written once during manufacturing or updated in-system via PMBus WRITE_PROTECTED commands without external memory.
Can IR3505MTRPBF operate in single-phase mode for low-power applications?
Yes. The device supports 1-, 2-, or 3-phase native operation, and automatically disables unused PHASEx outputs. In single-phase mode, it maintains full telemetry, loop compensation, and protection features-including overcurrent, overvoltage, and thermal shutdown-with no configuration changes required.
How is remote voltage sensing implemented on IR3505MTRPBF?
Remote sensing uses dedicated VSENSE+ and VSENSE− pins that connect directly to CPU/GPU VDD/VSS pads. The internal error amplifier compares this differential signal to the internal reference, rejecting PCB trace IR drop. Compensation network values (R/C) are programmable via PMBus to match board layout parasitics and ensure stability.
IR3505MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase3™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Processor
- Current - Supply:
- 3mA
- Voltage - Supply:
- 8V ~ 16V
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MLPQ (3x3)
IR3505MTRPBF FAQ
1.How can I place an order for IR3505MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3505MTRPBF 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 IR3505MTRPBF reliable?
The price and inventory of IR3505MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3505MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3505MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3505MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3505MTRPBF?
IR3505MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3505MTRPBF 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 IR3505MTRPBF?
For technical support, including IR3505MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3505MTRPBF requirements.
6.How does Aetrix verify that IR3505MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3505MTRPBF 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 IR3505MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3505MTRPBF?
All IR3505MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3505MTRPBF, 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 IR3505MTRPBF part is unused and in its original packaging.
Return procedure for IR3505MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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