My Inquiry
My Account
International Test Instruments Corporation IR3500VMTRPBF
- Part No.:
- IR3500VMTRPBF
- Manufacturer:
- International Test Instruments Corporation
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IR3500VMTRPBF.pdf
- Description:
- XPHASE3 VR11.1 CPU VTT CONTROL I
- Quantity:
- Payment:
- Shipping:
Inventory:2,420
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IR3500VMTRPBF from Infineon Technologies is a VR11.1-compliant CPU VTT control IC designed for multi-phase buck converter power supplies. It delivers 0.7% system set-point accuracy, programmable daisy-chain oscillator (250 kHz–9 MHz), dynamic VID slew rate control, and integrated remote sense amplifier with <50 µA bias current-used in high-performance server and desktop CPU memory termination voltage regulation.
For engineers reviewing the IR3500VMTRPBF datasheet, IR3500VMTRPBF pinout, IR3500VMTRPBF application, or IR3500VMTRPBF equivalent, key selection criteria include per-phase switching frequency programming via ROSC, open-sense-line detection thresholds (150–250 mV), VRHOT thermistor-based thermal monitoring, and PHSOUT/PHSIN daisy-chain timing synchronization across xPhase3™ phase ICs.
Technical Context
The IR3500VMTRPBF implements a centralized voltage regulator controller architecture for VR11.1-compliant VTT supplies, coordinating up to X phases via PHSOUT/PHSIN daisy-chaining and CLKOUT distribution. Its error amplifier features 30 MHz bandwidth and 12 V/µs slew rate, enabling fast transient response to CPU load changes.
It integrates dual-loop control: a high-bandwidth voltage loop using VOSEN+/VOSEN− remote sensing and a current-sharing loop via IIN input from phase ICs. Overvoltage protection triggers at 1.73 V (power-up) and ±130 mV relative to VDAC during normal operation, with dedicated ROSC/OVP pin reporting fault status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| System Set-Point Accuracy | ±0.7% - ensures tight VTT output tolerance under full load and temperature range, critical for DDR3/DDR4 signal integrity. |
| Oscillator Frequency Range | 250 kHz to 9 MHz (daisy-chain) - sets per-phase switching frequency from 250 kHz to 1.5 MHz without external clock source. |
| Error Amplifier Bandwidth | 30 MHz - enables sub-100 ns transient response to CPU VTT load steps, minimizing voltage droop. |
| Remote Sense Bias Current | <50 µA - minimizes IR drop error in long PCB traces between IC and memory module sense points. |
| VRHOT Monitoring Input | NTC thermistor interface via HOTSET - provides programmable thermal shutdown of VTT rail when power stage exceeds safe junction temperature. |
| PGOOD Delay | 0.5–2.3 ms - configurable startup validation window prevents false power-good assertion during soft-start ramp. |
| OC Delay Counter | 1024–4096 cycles - scales overcurrent protection delay inversely with PHSOUT frequency for consistent energy-limiting across phase counts. |
Pinout & Package
IR3500VMTRPBF uses a thermally enhanced 32-lead MLPQ package (5 mm × 5 mm body, 0.5 mm pitch), optimized for high-current CPU VTT applications with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | VR11.1 VID code inputs | Digital interface to CPU for dynamic VTT voltage selection; VID2–VID4 active, others grounded/pulled per Table 1. |
| VOSEN+, VOSEN− | Remote sense differential inputs | Measure true load-side VTT voltage; enable Kelvin sensing to reject PCB trace resistance error. |
| IIN | Average current monitor input | Receives summed current signals from xPhase3™ phase ICs for load-line and overcurrent protection. |
| PHSOUT / PHSIN | Daisy-chain phase timing interface | Generates/synchronizes per-phase clock edges across multiple phase ICs to minimize timing skew. |
| ROSC/OVP | Oscillator programming & OVP flag | Resistor sets switching frequency and bias currents; voltage >1.6 V indicates overvoltage fault condition. |
| VRHOT / HOTSET | Thermal monitoring interface | HOTSET connects NTC thermistor divider; VRHOT is open-drain output asserting low on thermal violation. |
| SS/DEL | Soft-start and OC delay timing | Capacitor-to-ground sets startup ramp time and hiccup-mode overcurrent delay duration. |
| PGOOD | Power-good status output | Active-high open-drain signal indicating stable VTT regulation within ±330 mV of VDAC reference. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Load-Line Output Impedance | Configured via VDRP–FB RC network to match Intel VR11.1 VTT load-line slope requirements (typically 1–5 mΩ). |
| Centralized Overvoltage Detection | Detects overvoltage at both power-up (1.73 V threshold) and dynamic operation (±130 mV around VDAC), signaling all phase ICs simultaneously. |
| Open Remote Sense Line Protection | Monitors VOSEN+ and VOSEN− independently; asserts fault if either line opens or differential exceeds 250 mV. |
| High-Speed Error Amplifier | 30 MHz bandwidth and 12 V/µs slew rate ensure <100 ns response to 1 A load transients typical in DDR memory termination. |
| Thermally Adaptive VRHOT Function | Uses NTC thermistor on HOTSET to scale thermal trip point with power stage temperature, preventing premature shutdown during burst loads. |
Applications
| Server Memory Subsystem | Desktop CPU VTT Regulation |
|---|---|
Use Scenario: Regulating DDR3/DDR4 VTT supply in dual-socket 2U rack servers with multi-rank memory modules. IC Role / Device Role / Timing Role: Central VR11.1 controller coordinating up to 4 xPhase3™ phase ICs via PHSOUT/PHSIN daisy-chain and CLKOUT distribution. Use Value: 0.7% set-point accuracy maintains signal integrity across 128 GB memory configurations; remote sense rejects >50 mΩ PCB trace resistance. | Use Scenario: Providing stable 0.75 V–1.25 V VTT for high-end desktop CPUs with quad-channel DDR4 memory controllers. IC Role / Device Role / Timing Role: Single-phase VTT controller interfacing directly with one xPhase3™ phase IC, using VID inputs for dynamic voltage scaling during CPU P-states. Use Value: Programmable dynamic VID slew rate prevents overshoot during rapid CPU state transitions; PGOOD delay avoids false boot failures. |
| Workstation Memory Termination | Embedded Computing VTT Supply |
Use Scenario: Powering ECC-protected memory in professional workstations supporting GPU-accelerated compute workloads. IC Role / Device Role / Timing Role: Dual-phase VTT controller with independent current monitoring on IIN, enabling precise load-line compensation under asymmetric memory channel loading. Use Value: Open-sense-line detection prevents undetected VTT collapse due to solder joint failure on memory DIMM connectors. | Use Scenario: Compact VTT supply in fanless embedded systems where thermal management relies on VRHOT-driven throttling. IC Role / Device Role / Timing Role: Standalone VTT controller with NTC thermistor on HOTSET, using VRHOT output to trigger system-level thermal mitigation before CPU throttling. Use Value: Integrated 32L MLPQ package reduces board area by 40% vs. discrete solutions while maintaining 150°C junction rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU VTT control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6367IRZ | VR12.0-compliant; supports higher VTT setpoints (up to 1.5 V); lacks integrated ROSC/OVP dual-function pin. | Targeted at newer platforms requiring VR12.0 compliance and higher VTT headroom for DDR5 precharge. | Select ISL6367IRZ only when upgrading to VR12.0 platforms; not drop-in compatible due to VID encoding and timing register differences. |
| TPS51200DRCR | Single-phase only; no daisy-chain PHSOUT/PHSIN; lower set-point accuracy (±1.0%) and no VRHOT interface. | Suitable for cost-sensitive embedded designs with fixed VTT voltage and minimal thermal monitoring needs. | Choose TPS51200DRCR for non-server applications where phase scalability and thermal safety are secondary to BOM cost. |
Compared with ISL6367IRZ and TPS51200DRCR, the IR3500VMTRPBF uniquely balances VR11.1 compliance, multi-phase scalability via daisy-chain timing, and integrated thermal monitoring-making it optimal for server-grade DDR3/DDR4 VTT where reliability and specification fidelity are mandatory.
Availability
IR3500VMTRPBF is available at Aetrix Electronics and suitable for server memory subsystems, desktop CPU VTT regulation, and workstation memory termination requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for IR3500VMTRPBF 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 IR3500V belongs to Infineon's xPhase3™ VR11.1 controller family, engineered specifically for precision CPU VTT regulation in high-density server and desktop platforms demanding tight voltage accuracy and robust fault protection.
FAQ
What is the function of the ROSC/OVP pin?
The ROSC/OVP pin serves two distinct functions: connecting a resistor to LGND sets the oscillator frequency and bias currents (ROSC mode), while its voltage rises above 1.6 V during overvoltage events to signal fault condition (OVP mode). This dual-role design eliminates need for separate timing and fault-reporting pins, reducing system complexity.
How does the IR3500VMTRPBF implement load-line regulation?
Load-line regulation is implemented by routing the buffered IIN signal through the VDRP pin into an external RC network tied to FB. This creates a controlled voltage drop proportional to load current, shifting the error amplifier's feedback reference to achieve the specified output impedance slope per VR11.1 spec.
Can the IR3500VMTRPBF operate in single-phase mode?
Yes, the IR3500VMTRPBF supports 1-to-X phase operation. In single-phase mode, PHSOUT drives the phase IC's PHSIN directly, CLKOUT connects to the phase IC's CLKIN, and IIN receives current feedback from that single phase-no configuration change is required beyond hardware interconnection.
What is the purpose of the SS/DEL capacitor?
The SS/DEL capacitor sets both soft-start ramp time (TD2 ≈ 0.8–3.25 ms) and overcurrent hiccup delay (OC Delay Counter scaling). Its value determines how quickly VTT reaches target voltage and how many switching cycles elapse before retry after overcurrent fault-enabling coordinated startup and fault recovery timing.
IR3500VMTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- International Test Instruments Corporation
- Series:
- XPhase3™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- 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)
IR3500VMTRPBF FAQ
1.How can I place an order for IR3500VMTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3500VMTRPBF 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 IR3500VMTRPBF reliable?
The price and inventory of IR3500VMTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3500VMTRPBF is usually 5 days.
3.What payment methods are accepted for IR3500VMTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3500VMTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3500VMTRPBF?
IR3500VMTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3500VMTRPBF 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 IR3500VMTRPBF?
For technical support, including IR3500VMTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3500VMTRPBF requirements.
6.How does Aetrix verify that IR3500VMTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3500VMTRPBF 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 IR3500VMTRPBF meets industry standards.
7.What is the process for return or replacement of IR3500VMTRPBF?
All IR3500VMTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3500VMTRPBF, 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 IR3500VMTRPBF part is unused and in its original packaging.
Return procedure for IR3500VMTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IR3500VMTRPBF Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
