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Infineon Technologies IR3500AMTRPBF
- Part No.:
- IR3500AMTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IR3500AMTRPBF.pdf
- Description:
- IC CTRL XPHASE3 VR11.0 32-MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:2,124
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Product details
Overview
IR3500AMTRPBF from Infineon Technologies is a VR11.0 and AMD PVID-compatible multiphase voltage regulator control IC that manages system-level power sequencing, dynamic VID control, and per-phase timing coordination with xPHASE3™ Phase ICs. It delivers 0.5% system set-point accuracy, programmable 250 kHz–1.5 MHz per-phase switching via ROSC resistor, and integrated remote sense amplifier with <50 µA bias current for server CPU/GPU core rail regulation.
For engineers reviewing the IR3500AMTRPBF datasheet, IR3500AMTRPBF pinout, IR3500AMTRPBF application, or IR3500AMTRPBF equivalent, key selection criteria include VIDSEL-configurable AMD/VR11 protocol support, programmable load line output impedance, central overvoltage detection with communication to phase ICs, and thermal monitoring via NTC-based VRHOT function.
Technical Context
The IR3500AMTRPBF implements a master-control architecture where it generates daisy-chained digital phase timing (CLKOUT/PHSOUT) and coordinates fault signaling (OCSET, ROSC/OVP, PGOOD) across up to X external Phase ICs. Its error amplifier features 30 MHz bandwidth and 12 V/µs slew rate for fast transient response in high-current CPU VR applications.
It supports dual-protocol VID decoding: AMD 5-/6-bit PVID (via VIDSEL resistor biasing) and Intel VR11 with optional 1.1 V boot voltage. Dynamic VID slew rate, load line (output impedance), and soft-start delay are all resistor- or capacitor-programmable using SS/DEL, OCSET, and ROSC pins - eliminating need for external DACs or microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| System Set-Point Accuracy | ±0.5% deviation from VID tables; ensures tight CPU core voltage tolerance under load transients. |
| Per-Phase Switching Frequency | 250 kHz to 1.5 MHz via ROSC resistor (7.75 kΩ–50 kΩ); enables optimal efficiency vs. size trade-off in multiphase designs. |
| Error Amplifier Bandwidth | 30 MHz typical; supports sub-100 ns load-step response for modern high-performance processors. |
| Remote Sense Bias Current | <50 µA on VOSEN+/VOSEN−; minimizes IR drop error in long PCB traces between VR and CPU socket. |
| VRHOT Threshold | 1.600 V ±16 mV; interfaces directly with NTC thermistor divider for accurate power-stage temperature monitoring. |
| PGOOD Delay | 0.5–2.3 ms after startup; provides stable power-good assertion only after output settles within ±1% of target. |
| OVP Detection Threshold | 1.73 V ±130 mV at power-up; triggers immediate shutdown if output exceeds safe margin before system initialization. |
Pinout & Package
IR3500AMTRPBF uses a thermally enhanced 32-lead MLPQ package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad for high-power density CPU VR applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID7–VID0 (Pins 1–8) | VID code inputs | Decode 5-/6-bit AMD PVID or VR11 digital voltage commands; logic thresholds differ based on VIDSEL configuration. |
| ENABLE (Pin 9) | Global enable input | Active-high; 850 mV threshold with 50 mV hysteresis ensures noise-immune startup/shutdown control. |
| VOSEN+ / VOSEN− (Pins 13/12) | Remote sense differential inputs | Measure true load voltage at CPU socket; enable Kelvin sensing to reject PCB trace resistance error. |
| IIN (Pin 18) | Average current monitor input | Receives summed phase currents from xPHASE3™ Phase ICs; used for overcurrent protection and load-line programming. |
| ROSC/OVP (Pin 23) | Oscillator timing & OVP input | Resistor sets per-phase frequency and bias currents; also serves as analog OVP comparator input during normal operation. |
| VRHOT / HOTSET (Pins 10/11) | Thermal monitoring interface | HOTSET connects NTC thermistor divider; VRHOT outputs open-drain low when sensed temperature exceeds threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Load Line Output Impedance | Configured via VDRP–FB RC network to emulate droop for current-sharing across parallel phases without current-sense resistors. |
| Dual-Protocol VID Support | Single hardware platform supports both AMD PVID (5/6-bit) and Intel VR11 via VIDSEL pin resistor selection - no firmware change required. |
| Centralized Overvoltage Protection | Detects overvoltage at VO and broadcasts fault signal to all connected Phase ICs within 180 ns propagation delay for coordinated shutdown. |
| Open Remote Sense Detection | Monitors VOSEN+ and VOSEN− independently; asserts fault if either line opens or loop gain drops below detectable level. |
| Integrated VCCL Linear Regulator | Provides regulated 1.2 V ±40 mV bias supply for internal circuitry; includes UVLO with 93% start/87% stop hysteresis relative to VCCL. |
Applications
| Server CPU Core VR | Workstation GPU Power Delivery |
|---|---|
|
Use Scenario: High-current, multi-phase voltage regulation for dual-socket Xeon Scalable processors in rack-mounted servers. IC Role / Device Role / Timing Role: Master controller coordinating up to 8 xPHASE3™ Phase ICs, managing VID updates, load-line droop, and centralized OVP. Use Value: Enables 0.5% voltage accuracy at >200 A loads while reducing board area by 30% versus discrete controller + PWM IC solutions. |
Use Scenario: Precision core rail regulation for NVIDIA A100 or AMD Instinct MI250X GPUs in AI training systems. IC Role / Device Role / Timing Role: VR11.0-compliant control IC synchronizing phase timing and current sharing across 6-phase converter with dynamic VID scaling. Use Value: Supports sub-100 ns load-step response and thermal foldback via VRHOT to prevent GPU throttling during sustained compute workloads. |
| High-End Desktop Platform VR | Enterprise Storage Controller Power |
|
Use Scenario: Enthusiast-grade desktop motherboards supporting Intel Core i9/K-series CPUs with adaptive voltage-frequency scaling. IC Role / Device Role / Timing Role: Configurable AMD/VR11 protocol handling with programmable dynamic VID slew rate for fine-grained power-state transitions. Use Value: Eliminates need for external VID DAC and reduces BOM count by integrating remote sense amplifier, error amp, and OVP comparator. |
Use Scenario: Dual-core ARM-based storage controllers requiring stable 1.2 V core supply with thermal derating for NAND flash management ASICs. IC Role / Device Role / Timing Role: Single-phase or 2-phase VR controller with VRHOT-driven thermal throttling and open-sense-line protection for field-replaceable modules. Use Value: Ensures uninterrupted operation in hot-swappable drive bays by detecting remote sense disconnection before catastrophic undervoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase voltage regulator control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35203MTRPBF | Successor with VR12.5/IMVP8 support, higher 3.5 MHz max phase frequency, and integrated MOSFET drivers. | Designed for newer Intel client platforms requiring faster dynamic VID and tighter voltage tolerances (±0.3%). | Select when upgrading from VR11.0 to IMVP8 and targeting lower system cost via driver integration. |
| TPS53679RTAT | Texas Instruments part with PMBus interface, 400 kHz–2 MHz frequency range, and built-in EEPROM for configuration storage. | Requires PMBus host controller; suited for systems needing telemetry logging, fault history, and field-upgradable settings. | Select when digital configuration, telemetry, and firmware-defined power states are required over analog VID simplicity. |
Compared with IR3500AMTRPBF, IR35203MTRPBF offers higher frequency headroom and native VR12.5 compliance but lacks AMD PVID support; TPS53679RTAT adds digital configurability at the cost of increased design complexity and external component count.
Availability
IR3500AMTRPBF is available at Aetrix Electronics and suitable for server motherboard design, AI accelerator power delivery, and high-end desktop platform development requiring stable component supply and long-term industrial lifecycle support.
Supply support for IR3500AMTRPBF 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 IR3500A belongs to Infineon's xPHASE3™ VR controller family, designed specifically for high-density, high-efficiency multiphase CPU/GPU core voltage regulation in datacenter and workstation platforms.
FAQ
What VID protocols does IR3500AMTRPBF support?
IR3500AMTRPBF supports both AMD 5-bit and 6-bit PVID protocols and Intel VR11.0 with or without 1.1 V boot voltage. Protocol selection is determined by the resistor value on VIDSEL: 6.49 kΩ selects AMD 6-bit, floating or VCCL-connected selects VR11, and LGND-connected selects AMD 5-bit. Threshold voltages are specified in the datasheet with ±50 mV margins.
How is per-phase switching frequency programmed?
Per-phase switching frequency is set by an external resistor (ROSC) connected from Pin 23 (ROSC/OVP) to LGND. The value determines both oscillator frequency and bias currents for OCSET, VSETPT, and VDAC. For example, 7.75 kΩ yields 1.5 MHz, 24.5 kΩ yields 500 kHz, and 50.0 kΩ yields 250 kHz - all without additional components.
Does IR3500AMTRPBF require external compensation components?
Yes - external RC networks are required on VDRP–FB (for load-line droop), SS/DEL–LGND (for soft-start timing), and VDAC–LGND (for dynamic VID slew rate and buffer compensation). These networks replace traditional Type II/III compensation and allow tuning without changing feedback topology.
Can IR3500AMTRPBF operate without a Phase IC?
No - IR3500AMTRPBF is a master control IC and requires at least one compatible xPHASE3™ Phase IC (e.g., IR3548A) to drive high-side/low-side MOSFETs. It provides timing, VID decoding, and fault coordination but does not integrate gate drivers or current sensing circuitry needed for standalone operation.
IR3500AMTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- XPhase3™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Processor
- Current - Supply:
- 6.5mA
- Voltage - Supply:
- 4.75V ~ 7.5V
- Operating Temperature:
- 0°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-MLPQ (5x5)
IR3500AMTRPBF FAQ
1.How can I place an order for IR3500AMTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3500AMTRPBF 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 IR3500AMTRPBF reliable?
The price and inventory of IR3500AMTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3500AMTRPBF is usually 5 days.
3.What payment methods are accepted for IR3500AMTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3500AMTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3500AMTRPBF?
IR3500AMTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3500AMTRPBF 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 IR3500AMTRPBF?
For technical support, including IR3500AMTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3500AMTRPBF requirements.
6.How does Aetrix verify that IR3500AMTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3500AMTRPBF 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 IR3500AMTRPBF meets industry standards.
7.What is the process for return or replacement of IR3500AMTRPBF?
All IR3500AMTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3500AMTRPBF, 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 IR3500AMTRPBF part is unused and in its original packaging.
Return procedure for IR3500AMTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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