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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - Special PurposeIR3581MTRPBF
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IR3581MTRPBF - Infineon Technologies

Manufacturer Part Number
IR3581MTRPBF
Manufacturer
Infineon Technologies
Allelco Part Number
32D-IR3581MTRPBF
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,430 pcs available, New & Original
Parts Description
IC REG CTRLR INTEL 2OUT 48QFN
Package
48-QFN (6x6)
Data sheet
IR3581MTRPBF.pdf

PCN Assembly/Origin

2.73KHz.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf

PCN Packaging

2.73KHz.pdf

Other Related Documents

Part Number Guide.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 14430
  • Unit Price: $2.872
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.872 $2.87
200+ $1.112 $222.40
500+ $1.073 $536.50
1000+ $1.053 $1,053.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

IR3581MTRPBF Tech Specifications
Infineon Technologies - IR3581MTRPBF technical specifications, attributes, parameters and parts with similar specifications to Infineon Technologies - IR3581MTRPBF

Product Attribute Attribute Value
Manufacturer Infineon Technologies
Voltage - Output -
Voltage - Input 3.3V
Supplier Device Package 48-QFN (6x6)
Series -
Package / Case 48-VFQFN Exposed Pad
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C
Number of Outputs 2
Mounting Type Surface Mount
Base Product Number IR3581
Applications Controller, Intel VR12, VR12.5

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

IR3581MTRPBF Image
IR3581MTRPBF (1)

Manufacturer Part Number

IR3581MTRPBF

Manufacturer

Infineon Technologies

Introduction

The IR3581MTRPBF is a specialized power management IC designed for voltage regulation, specifically tailored for use with Intel VR12 and VR12.5 platforms.

Product Features and Performance

Dual output voltage controller

Precise voltage regulation

Compatible with Intel VR12 and VR12.5 applications

Efficiency optimization

Surface Mount 48-VFQFN Exposed Pad package

Product Advantages

High integration for compact system design

Robust thermal performance with exposed pad package

Optimized for high-density power solutions

Key Technical Parameters

Input Voltage: 3.3V

Number of Outputs: 2

Operating Temperature Range: -40°C ~ 85°C

Quality and Safety Features

Built-in thermal protection

Short-circuit protection

Under-voltage lockout

Over-temperature shutdown

Compatibility

Designed specifically for Intel VR12 and VR12.5 platforms

Application Areas

Voltage regulation for CPUs and memory in computing applications

Power supply modules for servers and workstations

Product Lifecycle

Status: Obsolete

Check for replacement products or newer generations for long-term projects

Several Key Reasons to Choose This Product

Optimized for Intel-based server and workstation platforms

Highly efficient power conversion

Compact QFN package for space-constrained applications

Reliable operation across a wide range of temperatures

Direct support for technical queries with Infineon's expertise

Frequently Asked Questions(FAQ)

How does the IR3581MTRPBF support Intel VR12 and VR12.5 voltage regulation requirements in high-performance computing environments?
The IR3581MTRPBF is specifically designed to meet the stringent power delivery demands of Intel VR12 and VR12.5 architectures, commonly used in server and high-end desktop platforms. With dual outputs and a 3.3V input capability, it enables precise control over Vcore and VCCSA/VCCIO rails, ensuring stable operation under dynamic load conditions typical in multi-core processors. Its integration of digital control logic within a compact 48-QFN package reduces board space while maintaining compliance with Intel’s reference design guidelines for phase shedding, droop control, and telemetry.
What are the thermal and reliability implications of using the IR3581MTRPBF in a system operating at 85°C ambient temperature?
The IR3581MTRPBF has an extended operating temperature range from -40°C to 85°C, which includes full functionality at the upper limit. However, sustained operation near 85°C requires careful attention to layout and heatsinking due to the exposed pad on the 48-QFN package. While the IC itself is rated for this condition, the overall regulator performance—especially current delivery and efficiency—may degrade if thermal gradients induce junction temperatures beyond safe limits. Designers should verify that local airflow or thermal vias adequately dissipate heat from both the controller and external MOSFETs.
In what scenarios would the IR3581MTRPBF be preferable over a discrete analog PWM controller when implementing a dual-output CPU voltage regulator?
The IR3581MTRPBF offers advantages in systems where space, calibration accuracy, and design complexity must be minimized. Compared to discrete analog controllers, it integrates digital compensation, fault monitoring, and programmable features like current balancing and adaptive voltage positioning (AVP) directly into a single component. This reduces external passive component count and simplifies firmware integration for telemetry and power sequencing. For designs targeting VR12/VR12.5 compliance, the IR3581MTRPBF provides faster transient response and better noise immunity, making it ideal for high-speed DDR memory and multi-phase VRM configurations.
Can the IR3581MTRPBF operate reliably in industrial applications requiring RoHS3 and REACH compliance?
Yes, the IR3581MTRPBF meets RoHS3 standards, eliminating restricted substances such as lead, mercury, and cadmium beyond specified thresholds. It is also classified as REACH unaffected, meaning no SVHC (Substance of Very High Concern) content exceeding 0.1% by weight in articles. These qualifications ensure long-term supply stability and regulatory compliance for industrial, automotive, and telecom applications where environmental and safety certifications are mandatory.
How does the moisture sensitivity level (MSL) rating of MSL 2 affect storage and handling practices for the IR3581MTRPBF?
With an MSL rating of 2, the IR3581MTRPBF can be stored unopened for up to one year before assembly without baking, provided it remains in a dry environment below 30°C and 60% relative humidity. Once opened, it must be assembled within 168 hours under controlled conditions or baked prior to reflow to prevent moisture-induced defects during solder reflow. Proper handling per JEDEC J-STD-033 is essential to avoid popcorning failures in mass reflow processes.
What role does the 3.3V input voltage play in the power architecture when using the IR3581MTRPBF?
The 3.3V input rail serves as a stable bias supply for the IR3581MTRPBF’s internal circuits, including gate drivers, ADC, and digital logic. This enables the controller to function even when the main output rails are not yet active, facilitating soft-start sequencing and enabling efficient power management across multiple phases. In multi-stage power systems, the 3.3V input allows the IR3581MTRPBF to remain powered during standby modes while managing only the secondary output stages.
Is the IR3581MTRPBF compatible with third-party MOSFETs, or does it require specific Infineon components?
The IR3581MTRPBF is designed to work with a wide range of N-channel MOSFETs commonly used in synchronous buck topologies. While Infineon recommends matched driver-MOSFET pairs for optimal switching performance and thermal balance, the controller supports standard logic-level and low-gate-charge devices from other manufacturers. Designers should still validate gate drive timing, dead-time settings, and current sensing compatibility to ensure reliable operation across different MOSFET families.
How does the IR3581MTRPBF compare to the base model IR3581 in terms of packaging and pinout?
The IR3581MTRPBF is the lead-free, tape-and-reel packaged version of the base IR3581 model. Both share identical electrical characteristics, including the same 48-pin QFN (6x6 mm) pinout and functional capabilities. The "M" suffix denotes manufacturing date code, while "T" indicates reel packaging and "R" signifies tape width; "PBF" confirms lead-free finish compliant with RoHS3. No functional differences exist between them, making the IR3581MTRPBF suitable for automated assembly lines requiring standardized SMT handling.
What design considerations are critical when routing signals on the bottom layer adjacent to the exposed pad of the IR3581MTRPBF?
The exposed pad on the IR3581MTRPBF acts as a thermal interface and ground plane connection. Signal traces routed beneath or near this pad should avoid sharp angles and minimize coupling to high-current return paths such as inductor ground returns. To preserve thermal performance and signal integrity, designers should use solid copper fill connected via multiple thermal vias to inner or outer ground planes, ensuring low-impedance thermal and electrical paths without interfering with sensitive feedback loops.
Can the IR3581MTRPBF support dynamic voltage scaling required by modern CPUs like those in Intel's latest generations?
Yes, the IR3581MTRPBF includes built-in support for digital voltage scaling through its integrated DAC and I²C/SMBus interface. This allows real-time adjustment of output voltages in response to processor load states, supporting features like SpeedStep and C-states. The controller’s fast transient response ensures minimal deviation during rapid voltage transitions, critical for maintaining system stability during idle-to-load state changes in modern x86 architectures.
What is the significance of the ECCN classification EAR99 for the IR3581MTRPBF in global supply chain logistics?
An ECCN (Export Control Classification Number) of EAR99 means the IR3581MTRPBF is not subject to U.S. export restrictions under the Export Administration Regulations, unless used in certain military or proliferation-sensitive applications. This simplifies international procurement and distribution, allowing broader access across regions like EAR99-compliant countries without requiring individual license approvals. It reflects the part’s status as a general-purpose semiconductor component with civilian market focus.
How does the IR3581MTRPBF handle overcurrent protection compared to simpler linear regulators?
Unlike linear regulators, the IR3581MTRPBF implements cycle-by-cycle current limiting and overcurrent detection through its integrated sense amplifier and fault reporting mechanism. When combined with external shunt resistors or MOSFET RDS(on) sensing, it can detect excessive load currents and respond by reducing duty cycle or asserting a fault flag. This provides robust protection against short circuits and overloads without relying solely on thermal shutdown, offering faster response than purely thermal-based methods used in basic linear solutions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Infineon Technologies IR3581MTRPBF

Product Attribute IR3584MTRPBF IR3580MTRPBF IR3583MTRPBF IR3570BMTRPBF
Part Number IR3584MTRPBF IR3580MTRPBF IR3583MTRPBF IR3570BMTRPBF
Manufacturer Infineon Technologies Infineon Technologies Infineon Technologies Infineon Technologies
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Output - - - -
Number of Outputs - - - -
Applications - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Input - - - -
Series - - - -

IR3581MTRPBF Datasheet PDF

Download IR3581MTRPBF pdf datasheets and Infineon Technologies documentation for IR3581MTRPBF - Infineon Technologies.

Datasheets
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
2.73KHz.pdf
PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf
PCN Design/Specification
Cylindrical Battery Holders.pdf
PCN Packaging
2.73KHz.pdf
Other Related Documents
Part Number Guide.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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  • ISO 9001: 2015
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IR3581MTRPBF Image

IR3581MTRPBF

Infineon Technologies
32D-IR3581MTRPBF

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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