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Infineon Technologies IR3084AMPBF
- Part No.:
- IR3084AMPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
IR3084AMPBF.pdf
- Description:
- IC XPHASE CONTROL 28-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:4,163
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Product details
Overview
IR3084AMPBF from Infineon Technologies is a VR10/VR11-compliant multiphase voltage regulator control IC designed for CPU core power delivery in high-performance computing systems. It implements feed-forward voltage-mode PWM control, supports 1–X phase operation with matching IR XPhase™ Phase ICs, delivers 0.5% system setpoint accuracy, features programmable VID offset and dynamic slew rate, and operates from a 12V input with 9.9V UVLO.
For engineers reviewing the IR3084AMPBF datasheet, IR3084AMPBF pinout, IR3084AMPBF application, or IR3084AMPBF equivalent, this device is selected for precision VR10/VR11 compliance, remote differential sensing (±300mV), programmable oscillator (150kHz–1MHz), hiccup over-current protection with delay, and thermal-enhanced 5mm × 5mm MLPQ-28 packaging - all critical for server and workstation CPU power design.
Technical Context
The IR3084A functions as the master controller in Infineon's XPhase™ architecture, communicating via a 5-wire analog bus (bias voltage, phase timing, average current, EAOUT, VID) to slave Phase ICs. Its error amplifier provides >100 dB DC gain and 10 MHz GBW, referenced to VSETPT, with programmable load-line impedance via VDRP/FB network.
It integrates a 6.9V/6mA bias regulator (VBIAS), VRHOT comparator interface, REGDRV/REGSET/REGFB circuitry for gate driver bias regulation, and SS/DEL-controlled soft-start with four distinct timing phases (TD1–TD4). VIDSEL pin configures both DAC table (VR10 vs VR11) and startup mode (legacy vs standard).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| System Setpoint Accuracy | ±0.5% - ensures tight output voltage regulation across VID codes and temperature (0°C–100°C) |
| Oscillator Frequency Range | 150 kHz to 1 MHz - enables flexible switching frequency selection for EMI optimization and efficiency trade-offs |
| Differential Remote Sense | ±300 mV - supports accurate load-point voltage regulation despite PCB trace resistance |
| VID Code Support | VR11 (8-bit) and extended VR10 (7-bit) - maintains backward compatibility while enabling finer voltage granularity |
| UVLO Threshold | 9.9 V start / 9.1 V stop - prevents unstable operation during 12V rail brown-out conditions |
| Hiccup OCP Delay | 250 µs typical - avoids false triggering during transient current spikes while ensuring fast fault response |
| VBIAS Output | 6.9 V ±300 mV at 6 mA - supplies stable reference for internal circuitry and external Phase IC gate drivers |
Pinout & Package
IR3084AMPBF uses a thermally enhanced 5 mm × 5 mm, 28-pin MLPQ (Exposed Pad) package with exposed thermal pad on underside for PCB heat sinking. Pin 1 is marked by a dot; pin numbering follows counter-clockwise convention starting from top-left corner when viewed top-down.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIDSEL | Mode configuration input | Selects VR10/VR11 DAC table and startup type (GND/float/VBIAS/VCC logic levels) |
| 2–9 VID7–VID0 | Digital VID code inputs | 8-bit parallel interface to CPU VRM; require external pull-up resistors |
| 10 VOSNS− | Negative remote sense input | Completes Kelvin sense path to load ground; enables ±300 mV differential sensing |
| 12 VDAC | Regulated DAC output | VID-derived reference voltage; drives external RC network for dynamic slew rate control |
| 14 VSETPT | Error amp non-inverting input | Setpoint node for droop programming; referenced to VDAC via external resistor divider |
| 15 IIN | Current share input | Receives average phase current from Phase ICs; enables active current balancing |
| 17 FB | Error amp inverting input | Feedback node for output voltage regulation; connected to output divider network |
| 18 EAOUT | Error amplifier output | Drives low during UVLO or fault; controls Phase IC enable/disable sequencing |
| 20 VBIAS | Internal bias regulator output | 6.9 V reference for internal circuits and Phase IC gate driver biasing |
| 22 LGND | Local ground reference | Substrate and internal circuit return; separate from power ground for noise isolation |
| 26 SS/DEL | Soft-start and delay timing | Capacitor-connected node controlling startup ramp time and OC fault delay window |
| 27 VRRDY | Open-drain ready indicator | Asserts low during startup/fault; requires external pull-up for VR_READY signaling |
| 28 ENABLE | Global enable input | Logic-low active; 0.85 V threshold with 100 mV hysteresis for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VID offset at VSETPT | Enables zero-offset droop implementation using external resistor to VDAC, supporting precise load-line tuning |
| Dynamic VID slew rate control | Configurable via RC network on VDAC–VOSNS−, preventing excessive dV/dt during VID transitions |
| Four-mode VIDSEL configuration | Supports VR10/VR11 DAC + legacy/standard startup in single pin - eliminates board-level strapping options |
| Integrated 6.9V bias regulator | Supplies stable reference for internal blocks and external Phase IC gate drivers without auxiliary LDO |
| Hiccup over-current protection | Programmable delay prevents false trips during load transients while maintaining safe thermal shutdown behavior |
Applications
| Server CPU Core Power | Workstation GPU Core Supply |
|---|---|
|
Use Scenario: Dual-socket x86 server motherboard delivering 100+ A to multi-core CPUs under dynamic DVFS loads. IC Role / Device Role / Timing Role: Master VR11 control IC coordinating up to 16 phases via XPhase™ analog bus; manages VID updates, load-line, and fault signaling. Use Value: Enables <0.5% output regulation accuracy and fast transient response (<10 µs) required for Intel VR11 compliance and AVX-heavy workloads. |
Use Scenario: High-end workstation graphics card supplying 80+ A to GPU die with aggressive voltage scaling during compute-intensive rendering. IC Role / Device Role / Timing Role: Primary voltage controller interfacing with GPU VRM firmware; handles VR10/VR11 VID decoding and phase interleaving timing. Use Value: Supports programmable dynamic VID slew rate to prevent overshoot during rapid GPU frequency transitions, reducing system-level instability. |
| AI Accelerator Board Power | High-Density Storage Controller Supply |
|
Use Scenario: PCIe-based AI inference accelerator requiring tightly regulated 0.8–1.2 V core supply with <1% total error budget. IC Role / Device Role / Timing Role: Central control unit managing multiple IR3086 Phase ICs; performs remote sensing, current sharing, and VRHOT monitoring. Use Value: ±300 mV differential remote sense capability compensates for PCB voltage drop across dense interconnects, preserving accuracy at point-of-load. |
Use Scenario: Enterprise NVMe SSD controller board needing robust, scalable core voltage regulation for NAND flash and PCIe PHY blocks. IC Role / Device Role / Timing Role: Multiphase VR controller implementing hiccup OCP and soft-start sequencing to protect flash memory during hot-plug events. Use Value: Programmable SS/DEL capacitor timing ensures controlled inrush current and prevents rail collapse during simultaneous SSD initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR10/VR11 multiphase control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3085AMPBF | Includes integrated MOSFET drivers; eliminates need for external Phase ICs but reduces phase scalability | Suitable for ≤4-phase designs where board space is constrained and discrete phase control is unnecessary | Choose IR3085AMPBF only if full integration is prioritized over XPhase™ modularity and >4-phase expansion. |
| ISL6367IRZ | Supports VR12.5/IMVP7; adds digital SVID interface and PMBus telemetry; lacks analog XPhase™ bus | Required for newer Intel platforms with SVID communication; incompatible with IR XPhase™ Phase IC ecosystem | Choose ISL6367IRZ when upgrading to SVID-based CPU platforms; not interchangeable with IR3084A in VR11-only systems. |
Compared with IR3085AMPBF, IR3084AMPBF offers superior scalability (1–X phases) and thermal performance via discrete Phase IC partitioning; compared with ISL6367IRZ, it provides lower latency analog control and proven compatibility with legacy VR10/VR11 infrastructure but lacks digital telemetry.
Availability
IR3084AMPBF is available at Aetrix Electronics and suitable for server motherboard design, AI accelerator power delivery, and high-density storage controller applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for IR3084AMPBF 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 IR3084A belongs to Infineon's XPhase™ VR controller product line, engineered specifically for scalable, high-current CPU/GPU core power delivery in datacenter and workstation platforms demanding VR10/VR11 compliance.
FAQ
What is the function of the VIDSEL pin, and how do its four logic states affect operation?
The VIDSEL pin configures both DAC table (VR10 vs VR11) and startup mode (legacy vs standard). GND selects VR10 DAC + VR11 startup; floating (~1.25 V) selects VR11 DAC + VR11 startup; VBIAS (~6.9 V) selects VR11 DAC + legacy VR10 startup; VCC (~12 V) selects VR10 DAC + legacy VR10 startup. Each state sets internal current sources and timing paths accordingly, verified in datasheet Table 1 and Figure 12.
Can IR3084AMPBF operate without external Phase ICs?
No - IR3084AMPBF is a dedicated Control IC and requires companion IR XPhase™ Phase ICs (e.g., IR3086) to drive high-side/low-side MOSFETs and perform per-phase current sensing. It lacks integrated gate drivers and cannot directly control power stages; its outputs (EAOUT, RMPOUT, VBIAS) are designed exclusively for analog bus communication with Phase ICs.
How is the 0.5% system setpoint accuracy achieved across temperature and VID codes?
Accuracy is achieved through factory-trimmed VDAC output that compensates for error amplifier input offset errors (Note 2, p.5), combined with matched internal current sources for VSETPT bias (±1% tolerance) and ROSC-programmed bias currents. The test circuit in Figure 1 emulates in-VR operation and validates deviation within ±0.5% across 0.5–1.0 V VID range and 0°C–100°C junction temperature.
What is the role of the VDRP pin, and how does it interact with FB for load-line programming?
VDRP buffers the IIN signal and connects to FB via an external RC network to program output impedance (load-line). The VDRP amplifier's bandwidth (1–6 MHz) and slew rate (5–10 V/µs) allow fast current-sense feedback injection into the error amplifier loop, enabling precise droop slope control independent of VSETPT resistor values - confirmed in Electrical Specifications p.4 and PIN DESCRIPTIONS p.6.
IR3084AMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase™
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tube
- 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)
IR3084AMPBF FAQ
1.How can I place an order for IR3084AMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3084AMPBF 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 IR3084AMPBF reliable?
The price and inventory of IR3084AMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3084AMPBF is usually 5 days.
3.What payment methods are accepted for IR3084AMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3084AMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3084AMPBF?
IR3084AMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3084AMPBF 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 IR3084AMPBF?
For technical support, including IR3084AMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3084AMPBF requirements.
6.How does Aetrix verify that IR3084AMPBF is sourced from the original manufacturer or authorized distributors?
All IR3084AMPBF 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 IR3084AMPBF meets industry standards.
7.What is the process for return or replacement of IR3084AMPBF?
All IR3084AMPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3084AMPBF, 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 IR3084AMPBF part is unused and in its original packaging.
Return procedure for IR3084AMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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