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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

Infineon Technologies IR3500MTRPBF

Name: IR3500MTRPBF
Brand: Infineon Technologies
SKU: IR3500MTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3500MTRPBF

Manufacturer:: Infineon Technologies

Category:: Power Management - Specialized

Package:: 32-VFQFN Exposed Pad

Datasheet:: IR3500MTRPBF.pdf

Description:: IC XPHASE3 CONTROLLER 32-MLPQ

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IR3500MTRPBF from Infineon Technologies is a VR11.0 and AMD PVID-compatible multiphase voltage regulator control IC that manages system-level power sequencing, dynamic VID adjustment, 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 CPU/GPU core voltage regulation in high-performance computing platforms.

For engineers reviewing the IR3500MTRPBF datasheet, IR3500MTRPBF pinout, IR3500MTRPBF application, or IR3500MTRPBF equivalent, key selection criteria include VR11/AMD VID mode configuration via VIDSEL, programmable load line (VDRP/FB RC network), central overvoltage detection with ROSC/OVP reporting, and thermal monitoring via VRHOT with NTC thermistor interface.

Technical Context

The IR3500 implements a master-control architecture where it generates daisy-chained digital phase timing (CLKOUT/PHSOUT) and coordinates up to X phases via dedicated PHSIN/PHSOUT signaling with external xPHASE3™ Phase ICs. Its error amplifier features 30 MHz bandwidth and 12 V/µs slew rate to support fast transient response in sub-1V core rails.

It integrates dual-mode VID decoding (Intel VR11 with/without 1.1V boot, AMD 5-/6-bit PVID), programmable dynamic VID slew rate (via VDAC RC), and centralized protection including overvoltage (OVP threshold 1.73V ±130mV at power-up), overcurrent (OCSET resistor-programmed), and open remote sense detection (VOSEN+/VOSEN− differential comparator).

Key Specifications

Parameter	Value and Actual Design Meaning
System Set-Point Accuracy	±0.5% deviation across 0.3–1.5V output range; enables tight CPU core voltage tolerance under dynamic load changes.
Per-Phase Switching Frequency	250 kHz to 1.5 MHz (set by ROSC resistor 7.75kΩ–50kΩ); eliminates external clock components and supports scalable phase count.
Error Amplifier Bandwidth	30 MHz typical; ensures stable loop compensation for fast load transients in high-current VR applications.
Remote Sense Bias Current	<50 µA on VOSEN+ and VOSEN−; minimizes IR drop error in long PCB traces between VR and processor die.
VRHOT Threshold	1.600 V ±16 mV; triggers thermal shutdown when NTC-based HOTSET voltage drops below threshold, protecting power stage MOSFETs.
VIDSEL Mode Selection	Dual-threshold logic (0.6V for AMD 5/6-bit, 3.3V for VR11 boot/no-boot); enables single hardware design to support both Intel and AMD platforms.
OVP Detection Delay	90–300 ns propagation from VO overdrive to ROSC/OVP assertion; provides rapid fault signaling to system management controller.

Pinout & Package

IR3500MTRPBF is housed in a thermally enhanced 32-lead MLPQ package (5 mm × 5 mm body, 0.5 mm pitch), optimized for high-power density VR designs with exposed thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
VID7–VID0	VID code inputs	8-bit parallel bus accepting Intel VR11 or AMD PVID codes; decoded internally to generate precise VDAC reference.
ENABLE	Global enable input	Logic-high active; thresholds differ for VR11 (850 mV) and AMD (1.2 V) modes; hysteresis prevents chatter during power ramp.
VOSEN+, VOSEN−	Remote sense differential inputs	True Kelvin sensing inputs; low 50 µA bias current preserves accuracy across PCB trace resistance.
VDRP	Current-sense buffer output	Buffered IIN signal used with external RC on FB to program load-line (ESR) compensation for droop control.
ROSC/OVP	Oscillator programming & OVP flag	Resistor sets switching frequency; voltage >1.6V indicates overvoltage condition-directly readable by host controller.
VRHOT, HOTSET	Thermal monitor interface	HOTSET connects to NTC thermistor divider; VRHOT is open-drain output asserting low on thermal fault.
SS/DEL	Soft-start & OC delay timing	Capacitor-to-ground sets soft-start time (0.8–3.25 ms) and hiccup delay; internal charge/discharge ratio controls ramp profile.

Key Features

Feature	Design Value
Multi-standard VID support	Single IC supports Intel VR11 (with/without 1.1V boot) and AMD PVID (5- or 6-bit) via VIDSEL pin configuration-reduces BOM variants.
Centralized OVP with communication	Detects overvoltage at power-up (1.73V threshold) and during operation (125 mV above VDAC); signals all connected Phase ICs via IIN bus.
Programmable load-line impedance	VDRP-driven RC network on FB pin sets output impedance slope (droop) to match CPU current-sense requirements without external op-amps.
Open remote sense detection	Monitors VOSEN+ and VOSEN− independently; asserts fault if either line opens or differential exceeds 250 mV-prevents false regulation.
Integrated VCCL linear regulator	On-chip bias regulator with programmable UVLO (94% VCCL start threshold) and 1.19V reference; reduces external component count for auxiliary supply.

Applications

Desktop CPU VR

Laptop GPU Core VR

Use Scenario: Regulating 0.8–1.4V core voltage for Intel Core i7/i9 or AMD Ryzen CPUs with dynamic VID scaling.

IC Role / Device Role / Timing Role: Master control IC coordinating up to 8 xPHASE3™ Phase ICs; manages VID updates, load-line droop, and per-phase timing via CLKOUT/PHSOUT.

Use Value: Achieves ±0.5% set-point accuracy and sub-200 ns OVP response-meeting Intel VR11.0 specification for desktop platform stability.

Use Scenario: Delivering tightly regulated 0.7–1.2V GPU core rail in thin-and-light notebooks with thermal constraints.

IC Role / Device Role / Timing Role: Controls dual-phase converter with VRHOT monitoring of GPU VRM MOSFET temperature via NTC on HOTSET.

Use Value: Integrated remote sense amplifier (<50 µA bias) and programmable VID slew rate prevent overshoot during GPU boost transitions.

Server Processor VR

Workstation FPGA Core VR

Use Scenario: High-current (≥200 A) core supply for dual-socket Xeon Scalable processors with multi-rail sequencing.

IC Role / Device Role / Timing Role: Central controller managing 6–12 phases; uses IIN bus to aggregate current data and trigger coordinated overcurrent protection.

Use Value: ROSC-programmable 250 kHz–1.5 MHz switching enables optimal efficiency vs. transient trade-off across wide load range.

Use Scenario: Precision 0.85–1.1V core supply for high-end FPGAs (e.g., Xilinx Virtex UltraScale+) requiring dynamic voltage scaling.

IC Role / Device Role / Timing Role: Implements AMD PVID mode with 6-bit resolution; uses SS/DEL capacitor to synchronize soft-start with FPGA configuration.

Use Value: VSETPT pin allows fine-tuning output offset relative to VDAC-enabling exact compliance with FPGA vendor VCCINT tolerances.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiphase VR control applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6367IRZ	Supports VR12.5 with digital SVID interface; lacks native AMD PVID decode; requires external VID translator for AMD platforms.	Targeted at newer Intel platforms only; no direct replacement for mixed Intel/AMD designs.	Select when upgrading to SVID-based systems and abandoning legacy VID buses.
TPS53679RTAT	Integrates MOSFET drivers; no external Phase IC required; supports D-CAP3 control but not VR11.0 timing protocol.	Suitable for compact, lower-phase-count designs where integration outweighs protocol fidelity.	Choose for space-constrained embedded applications where full xPHASE3™ scalability is unnecessary.

Compared with ISL6367IRZ and TPS53679RTAT, IR3500MTRPBF uniquely supports both VR11.0 and AMD PVID natively in one footprint, retains full daisy-chain phase timing compatibility, and delivers tighter 0.5% system accuracy-making it irreplaceable for legacy server/desktop VR designs requiring dual-standard compliance.

Availability

IR3500MTRPBF is available at Aetrix Electronics and suitable for desktop CPU VR, laptop GPU core VR, and server processor VR applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for IR3500MTRPBF 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 VR solutions.

The IR3500 belongs to Infineon's xPHASE3™ VR controller family, designed specifically to simplify high-current, multi-phase CPU/GPU voltage regulation while maintaining strict VR11.0 and AMD PVID compliance.

FAQ

What VID protocols does IR3500MTRPBF support?

IR3500MTRPBF supports Intel VR11.0 (with and without 1.1V boot voltage) and AMD PVID (5-bit and 6-bit) through hardware-selectable VIDSEL pin configuration. The VIDSEL pin voltage thresholds-0.6V for AMD mode and 3.3V for VR11 mode-are internally trimmed and verified per datasheet Table 3. No firmware or external logic is needed to switch between standards.

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. Values from 7.75 kΩ to 50.0 kΩ yield frequencies from 1.5 MHz down to 250 kHz, as specified in Electrical Characteristics Table on page 3 of the datasheet. The same resistor also scales OCSET, VSETPT, and VDAC bias currents proportionally.

Does IR3500MTRPBF require external Phase ICs?

Yes-IR3500MTRPBF is a master control IC and must be paired with Infineon's xPHASE3™ Phase ICs (e.g., IR3520x series) to drive high-current MOSFET stages. It provides CLKOUT, PHSOUT, and IIN signaling to coordinate timing and current sharing across multiple phases, but contains no integrated gate drivers or power switches.

What protection features are integrated?

IR3500MTRPBF integrates centralized overvoltage protection (OVP) with power-up and dynamic thresholds, overcurrent protection (programmed via OCSET resistor), open remote sense detection (VOSEN+/VOSEN−), thermal monitoring (VRHOT with NTC on HOTSET), and enable-input hysteresis. All protections assert fault signals directly to system controllers or disable PHSOUT/CLKOUT to halt phase operation.

IR3500MTRPBF 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)

IR3500MTRPBF FAQ

1.How can I place an order for IR3500MTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3500MTRPBF 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 IR3500MTRPBF reliable?

The price and inventory of IR3500MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3500MTRPBF is usually 5 days.

3.What payment methods are accepted for IR3500MTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3500MTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3500MTRPBF?

IR3500MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3500MTRPBF 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 IR3500MTRPBF?

For technical support, including IR3500MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3500MTRPBF requirements.

6.How does Aetrix verify that IR3500MTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3500MTRPBF 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 IR3500MTRPBF meets industry standards.

7.What is the process for return or replacement of IR3500MTRPBF?

All IR3500MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3500MTRPBF, 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 IR3500MTRPBF part is unused and in its original packaging.

Return procedure for IR3500MTRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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