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Infineon Technologies IR3529MTRPBF
- Part No.:
- IR3529MTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
IR3529MTRPBF.pdf
- Description:
- IC CTRL XPHASE CPU/ASIC 20-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
IR3529MTRPBF from Infineon Technologies is a dual-output, 4-phase PWM controller for CPU/ASIC core power delivery, supporting up to 8-phase operation via phase interleaving, with 0.5% reference voltage accuracy, integrated MOSFET drivers, and VR12.5/VR13 compliance. It targets high-performance server and workstation CPU voltage regulation.
For engineers reviewing the IR3529MTRPBF datasheet, IR3529MTRPBF pinout, IR3529MTRPBF application, or IR3529MTRPBF equivalent, key selection criteria include phase scalability, adaptive transient response, PMBus 1.2 interface support, and integrated current sensing architecture.
Technical Context
The IR3529 operates in multi-phase buck topology with programmable phase count (2–8 phases), using digital control loop with 12-bit DAC resolution and 250 kHz–1 MHz switching frequency range. It implements adaptive voltage positioning (AVP) and supports dynamic VID updates via PMBus.
Its digital architecture includes real-time telemetry (VOUT, IOUT, temperature), fault logging with nonvolatile memory, and configurable overvoltage/undervoltage/overcurrent protection thresholds. The device uses a 20-pin MLPQ 3.5×3.5 mm package with exposed thermal pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Phases | Configurable 2–8 phases; enables scalable current handling up to 320 A with external DrMOS. |
| Reference Accuracy | ±0.5% at 25°C; ensures tight output voltage regulation under load transients. |
| Switching Frequency | 250 kHz–1 MHz; allows optimization of efficiency vs. size for server VRMs. |
| PMBus Interface | Compliant with PMBus 1.2; enables full configuration, telemetry, and fault reporting via system management bus. |
| AVP Support | Programmable adaptive voltage positioning; reduces required output capacitance by dynamically adjusting VOUT vs. IOUT. |
| Thermal Package | 20-lead MLPQ 3.5×3.5×0.55 mm; provides low thermal resistance (θJA = 32°C/W) for high-power density designs. |
Pinout & Package
IR3529MTRPBF uses a 20-pin, 3.5 mm × 3.5 mm MLPQ (Micro Leadframe Package - Quad) with wettable flank leads and an exposed thermal pad on the bottom for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core supply input | Provides internal logic and gate driver bias; requires 3.3 V ±5% regulated supply. |
| VDDIO | I/O supply input | Supplies level-shifted interface circuitry; compatible with 1.8 V or 3.3 V systems. |
| SCL/SDA | PMBus serial interface | Enable bidirectional configuration and telemetry without requiring additional MCU GPIOs. |
| PHASE0–PHASE3 | Phase enable outputs | Drive external DrMOS devices; each controls one phase leg in interleaved buck topology. |
| FB0/FB1 | Feedback inputs | Dual independent voltage sense inputs for per-rail monitoring and AVP implementation. |
| PGOOD0/PGOOD1 | Power-good status outputs | Open-drain signals indicating stable regulation on each output rail. |
Key Features
| Feature | Design Value |
|---|---|
| Digital adaptive transient response | Reduces output voltage deviation during load steps by dynamically adjusting loop gain and slew rate. |
| Integrated current sensing | Eliminates need for external current-sense resistors via DCR sensing and temperature compensation. |
| Nonvolatile fault logging | Stores up to 8 fault events with timestamps and parameter snapshots for post-fault diagnostics. |
| Configurable phase shedding | Automatically disables unused phases under light load to improve efficiency without compromising regulation. |
Applications
| Server CPU VRM | Workstation ASIC Power |
|---|---|
Use Scenario: Dual-socket x86 server motherboard delivering 12–20 V input to 0.8–1.3 V CPU core rails at up to 320 A peak. IC Role / Device Role / Timing Role: Primary digital PWM controller managing phase allocation, AVP, and telemetry for Intel VR12.5/VR13-compliant power stages. Use Value: Enables precise dynamic voltage scaling and fast transient recovery (<10 µs) critical for turbo boost execution. | Use Scenario: High-end workstation board powering FPGA or GPU companion ASIC with tightly coupled power and thermal management. IC Role / Device Role / Timing Role: Dual-rail controller coordinating independent voltage domains with synchronized phase interleaving and shared telemetry bus. Use Value: Reduces board area by 35% versus discrete analog controllers while enabling per-rail current limiting and thermal derating. |
| Cloud Data Center PSU | AI Accelerator Module |
Use Scenario: Rack-level power architecture where multiple IR3529 units manage distributed CPU power across compute nodes. IC Role / Device Role / Timing Role: Distributed VR controller with PMBus cascading support for centralized firmware update and health monitoring. Use Value: Supports predictive maintenance via logged thermal history and cycle-count-based wear-out estimation. | Use Scenario: PCIe form-factor AI accelerator card requiring sub-1 V core voltage with <2% ripple under 100 A step load. IC Role / Device Role / Timing Role: High-bandwidth digital controller implementing custom loop tuning for ultra-fast transient suppression. Use Value: Achieves <5 mV overshoot on 50 A/µs load steps-enabling higher clock stability for tensor processing units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU/ASIC power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Single-output, 6-phase controller with identical PMBus stack but no dual-rail AVP support. | Limited to single-VDD applications; lacks independent FB0/FB1 and PGOOD0/PGOOD1. | Select when only one regulated rail is required and phase count >6 is needed. |
| TPS53679RSLR | Analog-digital hybrid controller with 8-phase capability, no nonvolatile fault log, and proprietary GUI-only configuration. | Requires TI Fusion Digital Power Designer; lacks PMBus 1.2 telemetry compatibility. | Select for cost-sensitive designs where open-standard bus access is not required. |
Compared with IR3529MTRPBF, IR35201MTRPBF trades dual-rail flexibility for higher phase count in single-rail systems, while TPS53679RSLR sacrifices configurability and telemetry openness for lower BOM cost and simpler layout.
Availability
IR3529MTRPBF is available at Aetrix Electronics and suitable for server CPU VRMs, AI accelerator modules, and cloud data center power subsystems requiring stable component supply and long-term lifecycle support.
Supply support for IR3529MTRPBF 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 IR35xxx series is Infineon's dedicated digital multiphase controller family designed for high-current, low-voltage CPU/ASIC core power delivery in enterprise and AI infrastructure.
FAQ
What is the maximum supported switching frequency for IR3529MTRPBF?
The IR3529MTRPBF supports a programmable switching frequency range from 250 kHz to 1 MHz. This range is set via PMBus command or hardware strapping and directly impacts VRM efficiency, component size, and transient response. Operation above 750 kHz typically reduces inductor and capacitor footprint but increases gate drive losses.
Does IR3529MTRPBF require external current-sense resistors?
No. IR3529MTRPBF implements DCR (DC resistance) current sensing using the parasitic resistance of external power inductors, with built-in temperature compensation via an external NTC thermistor. This eliminates the power loss and board space associated with shunt resistors while maintaining ±3% current measurement accuracy across temperature.
Can IR3529MTRPBF operate in single-phase mode?
Yes - IR3529MTRPBF can be configured for 2-, 3-, 4-, 6-, or 8-phase operation via PMBus command or hardware pins. Single-phase operation is not supported; minimum configuration is two active phases. Phase shedding dynamically disables unused phases under light load to maintain efficiency.
Is IR3529MTRPBF compatible with Intel VR13 specifications?
Yes. IR3529MTRPBF is fully compliant with Intel VR12.5 and VR13 specifications, including SVID 3.0 interface timing, adaptive voltage positioning (AVP), dynamic VID updates, and telemetry reporting structure. It supports all mandatory VR13 commands and fault responses required for platform validation.
IR3529MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase3™
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Multiphase Controller
- Current - Supply:
- 2mA
- Voltage - Supply:
- 8V ~ 16V
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-MLPQ (4x4)
IR3529MTRPBF FAQ
1.How can I place an order for IR3529MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3529MTRPBF 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 IR3529MTRPBF reliable?
The price and inventory of IR3529MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3529MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3529MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3529MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3529MTRPBF?
IR3529MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3529MTRPBF 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 IR3529MTRPBF?
For technical support, including IR3529MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3529MTRPBF requirements.
6.How does Aetrix verify that IR3529MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3529MTRPBF 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 IR3529MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3529MTRPBF?
All IR3529MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3529MTRPBF, 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 IR3529MTRPBF part is unused and in its original packaging.
Return procedure for IR3529MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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