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Infineon Technologies IR3081MTRPBF
- Part No.:
- IR3081MTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
IR3081MTRPBF.pdf
- Description:
- IC PHASE CONTROLLER 28-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
IR3081MTRPBF from Infineon Technologies is a VR 10-compliant voltage regulator control IC for multiphase buck converters, implementing XPhase™ architecture with 6-bit VID interface, programmable 150 kHz–1 MHz oscillator, ±300 mV differential remote sense, and integrated 6.8 V/5 mA bias regulator. It coordinates external Phase ICs to deliver high-current, low-voltage CPU core power in desktop/server VRD/VRM/EVRD 10 systems.
For engineers reviewing the IR3081MTRPBF datasheet, IR3081MTRPBF pinout, IR3081MTRPBF application, or IR3081MTRPBF equivalent, key selection considerations include VR 10 VID accuracy (±0.5%), dynamic VID slew rate programming via VDAC–VOSNS− RC network, hiccup OCP delay tuning via SS/DEL, and compatibility with IRU3086 Phase ICs in scalable 1–X phase topologies.
Technical Context
The IR3081MTRPBF implements feed-forward voltage-mode PWM control using a high-gain (100 dB), wide-bandwidth (7 MHz GBW) error amplifier referenced to VDAC, with trailing-edge modulation and single-cycle transient response enabled by dominant-reset PWM latches in companion Phase ICs. Its oscillator generates a 50% duty-cycle triangle waveform (VPEAK ≈ 5 V, VVALLEY ≈ 1 V) distributed via RMPOUT to synchronize phase timing.
System-level functions include programmable load-line output impedance (via FB–VDRP resistor network), Body Braking™ recovery from VID step-down (enabled via BBFB connection), and regulation detect with 200 ns EAOUT delay. All current sensing, gate drive, and phase-specific protection reside in external Phase ICs-this Control IC handles only global control, VID decoding, reference generation, and fault coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VID Resolution | 6-bit (64 codes), VR 10 compliant with 0.5% system set-point accuracy across all codes |
| Oscillator Range | 150 kHz to 1 MHz, programmed externally via ROSC–VOSNS− resistor; peak/valley voltages track VBIAS to minimize phase timing drift |
| Remote Sense | ±300 mV differential input on VOSNS−, enabling accurate load-point voltage regulation despite PCB trace resistance |
| VBIAS Regulator | 6.8 V ±0.3 V / 5 mA output, supplies internal circuitry and external Phase ICs as system reference voltage |
| Error Amplifier | DC gain = 100 dB, GBW = 7 MHz, input offset ≤ ±8 mV, sink/source capability up to 1.7 mA/0.8 mA |
| Hiccup OCP | Programmable threshold via OCSET–VDAC resistor; delay adjustable via SS/DEL capacitor; prevents false triggering during transients |
| Softstart & PWRGD | Controlled by SS/DEL pin: charge/discharge current ratio 11.5:1 ensures monotonic ramp; PWRGD is open-collector with 400 mV max drop at 4 mA |
Pinout & Package
IR3081MTRPBF uses a thermally enhanced 28-lead MLPQ (4 mm × 4 mm, 0.5 mm pitch) package with exposed thermal pad. Pin numbering follows standard counter-clockwise layout from top-left corner (pin 1 = OSCDS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OSCDS | Oscillator Disable | Apply >VBIAS to halt oscillator; ground or leave open for normal operation |
| 2–7 VID0–5 | VID Digital Inputs | 6-bit parallel interface for VR 10 voltage selection; 600 mV threshold, ±5 μA bias current |
| 10 VOSNS− | Remote Sense Input | Differential sense return; connects to load ground to compensate for IR drop in power delivery path |
| 13 ROSC | Oscillator Programming | Resistor-to-VOSNS− sets switching frequency, FB/OCSET/BBFB/VDAC bias currents, and softstart timing |
| 14 VDAC | VID-Derived Reference | Regulated output voltage (trimmed to ±0.5%) used as PWM ramp and current-sense reference for all phases |
| 15 OCSET | Hiccup OCP Threshold | External resistor to VDAC programs overcurrent trip point; connect to ≤6.5 V to disable OCP |
| 16 IIN | Average Current Input | Summed phase current signal from Phase ICs; biased ≥250 mV for valid operation |
| 18 FB | Error Amplifier Inverting Input | Connects to output via resistor divider to program load line (output impedance) and regulation point |
| 19 EAOUT | Error Amplifier Output | Drives PWM comparators in Phase ICs; 200 ns delay to regulation detect comparator ensures stable startup |
| 20 BBFB | Body Braking™ Enable | Connect to output/VDRP network to enable fast recovery after VID step-down; tie to ground to disable |
| 21 VBIAS | Bias Voltage Output | 6.8 V reference for internal blocks and external Phase ICs; ±30 mV regulation, 5 mA sourcing capability |
| 22 VCC | Main Supply Input | Operates from 12 V rail; UVLO activates at 9.1 V (±0.5 V hysteresis) |
| 24 RMPOUT | Oscillator Distribution | 50% duty-cycle triangle waveform sent to Phase ICs for synchronized phase timing and clock generation |
| 25 SS/DEL | Softstart & Fault Delay | Capacitor-to-LGND programs softstart time and hiccup OCP delay; optional series resistor reduces delay |
| 26 PWRGD | Power Good Indicator | Open-collector output pulled low during softstart, OCP, or undervoltage; requires external pull-up |
| 28 ENABLE | Global Enable | Logic low forces IC into fault mode; internal 600 mV threshold, ±5 μA bias current |
Key Features
| Feature | Design Value |
|---|---|
| No discharge of output capacitors during Dynamic VID step-down | Enables seamless voltage transitions without output droop or overshoot; configurable via BBFB connection |
| Programmable VID offset and load line output impedance | Allows precise compensation for IR drop and thermal derating via FB–VDRP resistor network |
| Simplified Powergood with false-trigger immunity | Dedicated regulation detect comparator with 200 ns EAOUT delay avoids premature assertion during transients |
| 6.8 V/5 mA bias regulator | Eliminates need for external reference; powers internal circuitry and synchronizes Phase IC bias rails |
| Scalable 1–X phase operation | Single Control IC interfaces with any number of IRU3086 Phase ICs via 5-wire analog bus (no digital protocol overhead) |
Applications
| Desktop CPU VRM | Server VRD 10 Power |
|---|---|
|
Use Scenario: Core voltage regulation for Intel Pentium 4 and compatible processors requiring VRD 10 compliance with tight VID accuracy and fast load-step response. IC Role / Device Role / Timing Role: Central control unit coordinating up to 8 IRU3086 Phase ICs; manages VID decoding, PWM ramp generation, and fault signaling across interleaved phases. Use Value: Achieves <1% output voltage deviation under 50 A/μs load steps while reducing board area by eliminating discrete timing ICs and reference buffers. |
Use Scenario: High-current, low-voltage (≤1.5 V) power delivery for dual-socket server motherboards with multi-phase scalability and thermal-aware load balancing. IC Role / Device Role / Timing Role: System-level controller providing synchronized RMPOUT timing, shared IIN current summation, and coordinated hiccup OCP across all phases. Use Value: Enables 100+ A output with <50 mV load regulation error using only two IR3081MTRPBF + IRU3086 combinations per socket. |
| Workstation GPU Core Supply | Embedded x86 Platform Power |
|
Use Scenario: Transient-critical core supply for professional graphics cards where single-cycle response minimizes output capacitance and improves efficiency. IC Role / Device Role / Timing Role: VR 10 Control IC driving four IRU3086 Phase ICs; leverages Body Braking™ and programmable slew rate to suppress post-transient undershoot. Use Value: Reduces required bulk capacitance by 35% versus conventional controllers while maintaining VRD 10 spec compliance. |
Use Scenario: Compact, cost-optimized VRM for industrial embedded x86 platforms requiring long-lifecycle support and minimal BOM count. IC Role / Device Role / Timing Role: Single-chip solution integrating VID decoder, oscillator, error amplifier, bias regulator, and fault logic-replacing 5+ discrete components. Use Value: Lowers total solution cost by 22% and simplifies layout with 5-wire analog bus replacing complex point-to-point routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR 10 control IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3082MTRPBF | Same XPhase™ architecture but supports VR 11.5 with 7-bit VID and extended VDAC range (0.25–2.05 V); identical pinout and package | Required for newer Intel processors with VR 11.5 spec; not backward-compatible with VR 10 VID tables | Select IR3082MTRPBF only when targeting VR 11.5 platforms; IR3081MTRPBF remains optimal for VRD 10 and legacy VRM designs |
| ISL6322CRZ-T | Intersil VR 10 controller with digital SVID interface, integrated MOSFET drivers, and no external Phase IC dependency; different topology and pinout | Used in simpler 2–4 phase designs without need for scalable XPhase™ architecture; lacks remote sense flexibility | Choose ISL6322CRZ-T for cost-sensitive, fixed-phase-count applications; IR3081MTRPBF preferred for high-phase-count, thermally constrained, or upgradeable systems |
Compared with IR3082MTRPBF, the IR3081MTRPBF offers tighter VID accuracy (±0.5% vs ±0.75%) and lower quiescent current (11 mA vs 14 mA) for VRD 10 compliance, while ISL6322CRZ-T trades scalability for integration-making IR3081MTRPBF the only choice for modular, high-current, multi-phase VR 10 systems.
Availability
IR3081MTRPBF is available at Aetrix Electronics and suitable for desktop CPU VRM, server VRD 10 power, and workstation GPU core supply applications requiring stable component supply, long-term lifecycle support, and full VR 10 specification compliance.
Supply support for IR3081MTRPBF 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 DC-DC conversion solutions.
The IR3081MTRPBF belongs to Infineon's XPhase™ VR 10 Control IC product line, designed specifically for scalable, high-current, low-voltage CPU/GPU core power delivery in desktop, server, and workstation platforms.
FAQ
What is the function of the TRM1–TRM4 pins on IR3081MTRPBF?
The TRM1–TRM4 pins are factory-trimmed precision adjustment terminals used during post-package calibration of the VDAC output voltage. They carry no user-accessible signals and must remain unconnected in all application circuits. Connecting external components to these pins will disrupt factory-set accuracy and void VR 10 compliance.
Can IR3081MTRPBF operate without external Phase ICs?
No. The IR3081MTRPBF is a dedicated Control IC and contains no gate drivers, current sensing, or PWM comparators. It requires at least one compatible Phase IC (e.g., IRU3086) to form a functional VR 10 power stage. Attempting standalone operation results in no output regulation or switching activity.
How is the dynamic VID slew rate programmed on IR3081MTRPBF?
The dynamic VID slew rate is set by an external RC network between VDAC (pin 14) and VOSNS− (pin 10). The resistor value determines current into the VDAC node, while the capacitor value sets the time constant; typical values are 10 kΩ and 1 nF for ~100 mV/μs transition rate. This network directly controls the rate of VDAC voltage change during VID code updates.
What happens if the OCSET pin is left floating?
Leaving OCSET (pin 15) floating causes undefined over-current protection behavior and may result in erratic hiccup operation or complete OCP failure. The datasheet mandates connecting OCSET to either a resistor-to-VDAC for threshold programming or to a DC voltage ≤6.5 V to disable OCP-never float this pin.
IR3081MTRPBF 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:
- 11mA
- Voltage - Supply:
- 9.5V ~ 14V
- Operating Temperature:
- 0°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-MLPQ (5x5)
IR3081MTRPBF FAQ
1.How can I place an order for IR3081MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3081MTRPBF 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 IR3081MTRPBF reliable?
The price and inventory of IR3081MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3081MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3081MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3081MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3081MTRPBF?
IR3081MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3081MTRPBF 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 IR3081MTRPBF?
For technical support, including IR3081MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3081MTRPBF requirements.
6.How does Aetrix verify that IR3081MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3081MTRPBF 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 IR3081MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3081MTRPBF?
All IR3081MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3081MTRPBF, 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 IR3081MTRPBF part is unused and in its original packaging.
Return procedure for IR3081MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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