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Infineon Technologies IR3084AMTRPBF
- Part No.:
- IR3084AMTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
IR3084AMTRPBF.pdf
- Description:
- IC CTLR XPHASE 28-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
IR3084AMTRPBF from Infineon Technologies is a VR10/VR11-compliant multiphase voltage regulator control IC designed for CPU core power delivery in server and high-end desktop platforms. It implements feed-forward voltage-mode PWM control, supports 1–X phase operation with matching IR Phase ICs, delivers 0.5% system setpoint accuracy, features programmable VID offset and dynamic slew rate, and operates from 9.9V UVLO with 6.9V/6mA VBIAS regulator.
For engineers reviewing the IR3084AMTRPBF datasheet, IR3084AMTRPBF pinout, IR3084AMTRPBF application, or IR3084AMTRPBF equivalent, this device is selected for precision VR10/VR11 compliance, remote-sense stability (±300mV differential), hiccup over-current protection with programmable delay, and thermal performance in its 5mm × 5mm MLPQ-28 package.
Technical Context
The IR3084A functions as the master controller in Infineon's XPhase™ architecture, coordinating up to 16 phases via a 5-wire analog bus (VBIAS, RMPOUT, IIN, EAOUT, VDAC). Its error amplifier (100 dB DC gain, 10 MHz GBW) references VSETPT and drives EAOUT to regulate output voltage against VID-coded DAC setpoints.
It integrates a programmable 150 kHz–1 MHz oscillator (ROSC pin), dual-mode VID selection (VR10 7-bit / VR11 8-bit via VIDSEL pin), and dedicated circuitry for droop control (VDRP buffer), remote sensing (VOSNS−), and fault signaling (VRRDY open-collector output).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| System Setpoint Accuracy | ±0.5% - Ensures tight regulation across full VID range under load and temperature variation. |
| Oscillator Frequency Range | 150 kHz to 1 MHz - Programmable via ROSC resistor for optimal EMI/noise trade-off per design. |
| Differential Remote Sense | ±300 mV - Supports accurate load-point voltage monitoring despite PCB trace resistance. |
| VBIAS Output | 6.9 V / 6 mA - Supplies stable reference for internal blocks and external Phase IC biasing. |
| VID Code Support | VR10 (7-bit) and VR11 (8-bit) - Enables backward compatibility and future-proof CPU power sequencing. |
| UVLO Threshold | 9.9 V start / 9.1 V stop - Prevents erratic startup during 12 V rail brownout conditions. |
| Hiccup OCP Delay | 250 µs typical - Filters transient current spikes while ensuring fast response to sustained faults. |
Pinout & Package
IR3084AMTRPBF is housed in a thermally enhanced 5 mm × 5 mm, 28-pin MLPQ (Exposed Pad) package with exposed thermal pad on underside for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIDSEL | Mode Selection Input | Configures VR10/VR11 DAC table and startup type (legacy vs. VR11) via voltage level (GND/1.25V/6.9V/12V). |
| 2–9 VID7–VID0 | Digital VID Inputs | 8-bit parallel interface to CPU VRM; pulled up externally to define core voltage setpoint. |
| 10 VOSNS− | Negative Remote Sense | Connects to load ground to compensate for IR drop in power delivery path. |
| 12 VDAC | Regulated DAC Output | VID-derived reference voltage; used by Phase ICs and OCSET/VSETPT circuits. |
| 14 VSETPT | Error Amp Non-Inverting Input | Setpoint node for droop programming; external resistor to VDAC adjusts output impedance. |
| 15 IIN | Average Current Feedback | Receives summed current signals from Phase ICs for inter-phase current balancing. |
| 17 FB | Error Amp Inverting Input | Connects to output divider; closed-loop regulation point referenced to VSETPT. |
| 18 EAOUT | Error Amplifier Output | Drives low during UVLO or fault; controls Phase IC enable and PWM ramp generation. |
| 20 VBIAS | Internal Bias Regulator | 6.9 V reference for internal circuitry and Phase IC gate driver biasing. |
| 22 LGND | Local Ground | IC substrate and internal circuit return; separate from power ground for noise isolation. |
| 26 SS/DEL | Soft-Start & Fault Timing | Capacitor-connected node controlling startup ramp time and OC delay timing window. |
| 27 VRRDY | Open-Drain Ready Signal | Asserts low during startup or fault; requires external pull-up for VR_READY handshake. |
| 28 ENABLE | Global Enable Input | Active-high logic input (0.85 V threshold); internal 100 kΩ pull-down ensures safe default state. |
Key Features
| Feature | Design Value |
|---|---|
| Scalable XPhase™ Architecture | Enables 1–16 phase designs using single Control IC + modular Phase ICs, eliminating redundant silicon and simplifying layout. |
| Programmable Dynamic VID Slew Rate | Adjustable via external RC on VDAC pin to match CPU VID transition requirements without overshoot or instability. |
| Dual-Mode VID Startup Logic | Supports both VR11-type fast startup and legacy VR10-style sequencing via VIDSEL pin configuration. |
| Integrated VBIAS Regulator | 6.9 V / 6 mA output powers internal blocks and provides clean bias for external Phase IC gate drivers. |
| Remote Sensing with ±300 mV Range | Compensates for up to 300 mV of IR drop between VR output and CPU die, maintaining tight load regulation. |
Applications
| Server CPU Power Delivery | High-End Desktop VRM |
|---|---|
|
Use Scenario: Dual-socket x86 server motherboard delivering 100+ A at <1.2 V to multi-core CPUs. IC Role / Device Role / Timing Role: Master control IC managing 8-phase interleaved buck converter with IR3086 Phase ICs; synchronizes PWM timing and current sharing via analog bus. Use Value: Achieves >90% efficiency at full load and sub-10 µs transient response due to feed-forward voltage-mode control and distributed current sensing. |
Use Scenario: Enthusiast gaming motherboard supporting overclocked Core i9 or Ryzen Threadripper processors. IC Role / Device Role / Timing Role: VR11-compliant controller implementing adaptive load-line (droop) and dynamic VID transitions during P-state changes. Use Value: Maintains ±5 mV output accuracy across 0–100% load step while enabling precise voltage margining for validation testing. |
| Data Center GPU Power | AI Accelerator Board |
|
Use Scenario: PCIe add-in card powering NVIDIA A100 GPU requiring tightly regulated 0.8 V core supply. IC Role / Device Role / Timing Role: Primary voltage controller interfacing with GPU VRM BIOS; handles VR_HOT and VR_READY handshaking via VRRDY and VBIAS. Use Value: Enables hot-plug readiness and thermal throttling coordination through standardized VR interface signals. |
Use Scenario: Custom AI training board with multiple ASICs demanding independent, synchronized low-voltage rails. IC Role / Device Role / Timing Role: Centralized control unit orchestrating parallel multiphase converters per ASIC domain using shared VDAC and RMPOUT timing. Use Value: Reduces component count and layout complexity versus discrete controllers while preserving per-rail programmability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR10/VR11 control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3085AMTRPBF | Enhanced version with improved thermal performance, tighter 0.3% setpoint accuracy, and extended −40°C to +125°C operating range. | Required for extended-temperature industrial or telecom base station deployments where ambient exceeds 100°C junction limit. | Select when higher accuracy and extended temperature rating justify cost premium over IR3084A. |
| ISL6367IRZ | Intersil (Renesas) VR12.5 controller with integrated MOSFET drivers, 32-phase support, and digital PMBus interface. | Suitable for next-gen platforms requiring telemetry, adaptive voltage positioning, and firmware-updatable parameters. | Choose when digital control, telemetry, and >16-phase scalability outweigh analog simplicity and lower BOM cost. |
Compared with IR3084AMTRPBF, IR3085AMTRPBF improves accuracy and thermal margin for harsh environments, while ISL6367IRZ adds digital configurability and phase scalability at the cost of analog simplicity and higher integration complexity.
Availability
IR3084AMTRPBF is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VRM development, and AI accelerator power subsystems requiring stable component supply and long-term lifecycle support.
Supply support for IR3084AMTRPBF 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 leader specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
The IR3084A belongs to Infineon's XPhase™ VR controller family, engineered specifically for high-efficiency, scalable multiphase CPU/GPU core power delivery in data center and computing infrastructure.
FAQ
What is the function of the VIDSEL pin?
The VIDSEL pin configures both the DAC lookup table (VR10 vs. VR11) and startup behavior (legacy VR10 vs. VR11 fast-start). Four distinct voltage levels-GND (VR10 + VR11 startup), 1.25 V (VR11 + VR11 startup), 6.9 V (VR11 + legacy startup), and 12 V (VR10 + legacy startup)-determine operational mode. This enables hardware-selectable compatibility across CPU generations without firmware change.
How does the IR3084A implement remote sensing?
IR3084A uses differential remote sense via VOSNS− (Pin 10) and internal reference to measure voltage drop between VR output and CPU load point. The ±300 mV sensing range allows compensation for PCB trace resistance up to 3 mΩ at 100 A, ensuring regulation accuracy remains within ±0.5% despite IR losses. VOSNS− must connect directly to load ground, not local IC ground.
Can the IR3084A operate without external Phase ICs?
No-the IR3084A is a control-only IC and requires at least one companion Phase IC (e.g., IR3086) to drive high-side/low-side MOSFETs and provide current sensing. It lacks integrated gate drivers, PWM comparators, or current sense amplifiers. Attempting standalone operation results in no output regulation; all critical power-stage functions reside in the Phase ICs.
What is the purpose of the VDRP pin?
VDRP (Pin 16) buffers the IIN signal and feeds it to an external RC network tied to FB, enabling programmable output impedance for droop-based current sharing. By adjusting the RC time constant, designers set the effective load-line slope (mΩ) to ensure proportional current division among parallel phases-critical for thermal balance and reliability in high-current VRMs.
IR3084AMTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase™
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Processor
- Current - Supply:
- 14mA
- Voltage - Supply:
- 9.5V ~ 16V
- Operating Temperature:
- 0°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-MLPQ (5x5)
IR3084AMTRPBF FAQ
1.How can I place an order for IR3084AMTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3084AMTRPBF 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 IR3084AMTRPBF reliable?
The price and inventory of IR3084AMTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3084AMTRPBF is usually 5 days.
3.What payment methods are accepted for IR3084AMTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3084AMTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3084AMTRPBF?
IR3084AMTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3084AMTRPBF 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 IR3084AMTRPBF?
For technical support, including IR3084AMTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3084AMTRPBF requirements.
6.How does Aetrix verify that IR3084AMTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3084AMTRPBF 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 IR3084AMTRPBF meets industry standards.
7.What is the process for return or replacement of IR3084AMTRPBF?
All IR3084AMTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3084AMTRPBF, 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 IR3084AMTRPBF part is unused and in its original packaging.
Return procedure for IR3084AMTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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