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Renesas ISL6333IRZ-T
- Part No.:
- ISL6333IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333IRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,135
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Product details
Overview
ISL6333IRZ-T from Renesas (formerly Intersil) is a three-phase buck PWM controller with integrated MOSFET drivers, designed for Intel VR11.1-compliant microprocessor core voltage regulation. It delivers ±0.5% system accuracy over temperature, supports 8-bit VID input for DAC-based voltage selection, and features IMON current monitoring and PSI#-enabled phase dropping for light-load efficiency. It targets high-performance desktop and server CPU power delivery.
For engineers reviewing the ISL6333IRZ-T datasheet, ISL6333IRZ-T pinout, ISL6333IRZ-T application, or ISL6333IRZ-T equivalent, key selection considerations include its -40°C to +85°C industrial temperature range, 48-pin 7×7 QFN package, integrated DCR current sensing, Active Pulse Positioning (APP), and compatibility with coupled inductors and dynamic VID compensation.
Technical Context
The ISL6333IRZ-T implements a fully differential, continuous DCR current-sense architecture across three phases, enabling precise load-line programming and channel current balancing without external sense resistors. Its control loop integrates Adaptive Phase Alignment (APA) and APP modulation to accelerate transient response during high di/dt load steps.
It supports Intel VR11.1 protocols via dedicated pins: IMON for real-time output current reporting, PSI# for phase-dropping mode entry, and an 8-bit VID interface tied to a precision internal DAC. The device includes gate-drive optimization (GVOT) and diode emulation mode (DEM) to maximize light-load efficiency - confirmed functional for ISL6333 and ISL6333B variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade CPU power applications requiring thermal robustness. |
| Switching Frequency | Up to 1.0 MHz per phase - enables compact magnetics and high-density PCB layout. |
| System Accuracy | ±0.5% over temperature (1.000V–1.600V range) - ensures tight core voltage regulation under dynamic load and thermal stress. |
| VID Interface | 8-bit TTL-compatible input - directly selects VR11 DAC output voltages without external level-shifting. |
| Current Sensing | Fully differential, continuous DCR sensing with integrated programmable RISEN - eliminates external current-sense resistors and improves channel balance accuracy. |
| Protection Features | Multi-tiered OVP/UVP/OCP, open-sense-line prevention, thermal shutdown at 160°C - safeguards CPU and power stage against fault conditions. |
| Package | 48-lead 7×7 mm QFN (L48.7x7) - exposes thermal pad for efficient heat dissipation in high-current VRMs. |
Pinout & Package
ISL6333IRZ-T is housed in a 48-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package with exposed thermal pad (PKG DWG # L48.7x7). Pin assignments are identical to the ISL6333 family baseline (not ISL6333A/B/C variants), including BYP1 and PVCC2_3 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1+/ISEN1- | Differential current sense input (Phase 1) | Connects to RC network across Phase 1 inductor for accurate DCR-based current measurement. |
| UGATE1/LGATE1/BOOT1/PHASE1 | Phase 1 high-side/low-side gate drive interface | Drives external N-channel MOSFETs; BOOT1 supplies floating bias for UGATE1; PHASE1 is switch-node return. |
| VSEN/RGND | Differential remote voltage sense inputs | Enables Kelvin sensing at CPU VDD pins to compensate for PCB IR drop and maintain regulation accuracy. |
| IMON | Average output current monitor output | Provides analog voltage proportional to total load current - used for telemetry and system-level power management. |
| PSI# | Power State Indicator input | Active-low signal triggering single-phase operation and diode emulation mode to reduce light-load losses. |
| VID0–VID7 | VR11.1 voltage identification digital inputs | Directly configure DAC reference voltage per Intel VR11 specification; internally pulled up to ~1.2V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers | Eliminates need for external driver ICs - reduces BOM count, layout area, and propagation delay in 3-phase VRMs. |
| Active Pulse Positioning (APP) | Accelerates initial transient response to high di/dt load steps - allows reduction of bulk output capacitance by up to 30%. |
| Dynamic VID compensation (DVC) | Smooths voltage transitions during VID code changes - prevents overshoot/undershoot during CPU P-state transitions. |
| Gate Voltage Optimization Technology (GVOT) | Reduces lower-MOSFET gate drive voltage on Channel 1 - lowers conduction loss and improves light-load efficiency. |
| Diode emulation mode (DEM) | Disables low-side FET during light load and replaces conduction with synchronous rectification emulation - cuts switching losses. |
Applications
| Desktop CPU Power Delivery | Server Processor VRM |
|---|---|
Use Scenario: Regulating core voltage for Intel Core i7/i9 processors in high-end desktop motherboards with multi-phase VRMs. IC Role / Device Role / Timing Role: Primary three-phase PWM controller managing gate timing, current balancing, and VID decoding for CPU VDD. Use Value: Enables compliance with Intel VR11.1 spec, supports dynamic P-state transitions, and maintains ±0.5% voltage accuracy under 100 A load steps. |
Use Scenario: High-current power delivery for dual-socket Xeon platforms requiring thermal resilience and long-term reliability. IC Role / Device Role / Timing Role: Three-phase controller with integrated drivers and remote sensing, operating across -40°C to +85°C ambient. Use Value: Delivers stable regulation despite board-level IR drop; PSI#-driven phase shedding extends efficiency >90% down to 5% load. |
| Workstation GPU Core Supply | Embedded Computing Platform |
Use Scenario: Core voltage regulation for high-end discrete GPUs (e.g., NVIDIA RTX series) where transient response and thermal margin are critical. IC Role / Device Role / Timing Role: Fast-response PWM controller using APP and APA to suppress voltage droop during GPU shader clock bursts. Use Value: Reduces required bulk capacitance by leveraging rapid transient recovery - saves PCB space and cost in constrained GPU modules. |
Use Scenario: Power management for ruggedized embedded systems (e.g., industrial AI accelerators) requiring extended temperature operation. IC Role / Device Role / Timing Role: Industrial-grade VR11.1 controller supporting coupled inductors and dynamic VID for adaptive performance scaling. Use Value: Maintains regulation integrity across wide thermal swings; integrated protection prevents field failures due to overcurrent or overtemperature events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase VR11.1 buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6333CRZ-T | Same silicon, 0°C to +70°C temp grade; lacks industrial qualification. | Restricted to commercial-temperature environments (e.g., consumer desktops). | Select ISL6333CRZ-T only if ambient operating temperature remains within 0–70°C and cost is prioritized over thermal margin. |
| ISL6333BIRZ-T | Adds CPURST_N pin for Eaglelake chipset compatibility; removes IDROOP pin; droop always enabled via FB pin. | Required for legacy Intel Eaglelake platform designs; not drop-in compatible due to pin function reassignment. | Choose ISL6333BIRZ-T when interfacing with Eaglelake-era chipsets; verify CPURST_N routing and FB-connected droop implementation. |
Compared with ISL6333CRZ-T, the ISL6333IRZ-T provides guaranteed operation down to -40°C - essential for outdoor or industrial deployments. Versus ISL6333BIRZ-T, it retains the IDROOP pin and BYP1/PVCC2_3 architecture, preserving design flexibility for custom droop tuning and legacy layout reuse.
Availability
ISL6333IRZ-T is available at Aetrix Electronics and suitable for desktop CPU power delivery, server VRMs, workstation GPU core supplies, and ruggedized embedded computing platforms requiring stable component supply across extended temperature ranges.
Supply support for ISL6333IRZ-T 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
Renesas Electronics acquired Intersil in 2017 and continues to support its high-performance analog and power management portfolio, including VRM controllers for advanced computing platforms.
The ISL6333IRZ-T belongs to Renesas' Intel VR11.1-compliant PWM controller product line, engineered specifically for high-efficiency, multi-phase CPU/GPU core voltage regulation with integrated drivers and advanced transient response features.
FAQ
What is the operating temperature range of the ISL6333IRZ-T?
The ISL6333IRZ-T is rated for -40°C to +85°C ambient operation, making it suitable for industrial and server applications where thermal margins exceed commercial-grade alternatives. This range is validated per the datasheet's Recommended Operating Conditions table and confirmed by thermal resistance data (θJA = 28°C/W, θJC = 1.5°C/W).
Does the ISL6333IRZ-T support Intel VR11.1 specifications?
Yes, the ISL6333IRZ-T is explicitly designed for Intel VR11.1 compliance. It includes mandatory features: 8-bit VID interface, IMON output for current telemetry, PSI# input for phase dropping, differential remote sensing (VSEN/RGND), and dynamic VID compensation (DVC pin). These are documented in the FN6520 datasheet front page and feature list.
How does the ISL6333IRZ-T achieve high light-load efficiency?
The ISL6333IRZ-T achieves high light-load efficiency through two confirmed mechanisms: (1) PSI#-activated diode emulation mode (DEM), which disables the low-side MOSFET and emulates diode conduction, and (2) Gate Voltage Optimization Technology (GVOT), which reduces Channel 1's lower gate drive voltage to cut conduction losses - both specified in the Controller Descriptions section of FN6520.
What package type and pin count does the ISL6333IRZ-T use?
The ISL6333IRZ-T uses a 48-lead, 7 mm × 7 mm QFN package with exposed thermal pad (drawing number L48.7x7). Pinout matches the ISL6333 baseline variant - including BYP1, PVCC1, and PVCC2_3 - and is distinct from ISL6333A/B/C pin configurations, as shown in Figures 1–4 of the FN6520 datasheet.
Can the ISL6333IRZ-T be used with coupled inductors?
Yes, the ISL6333IRZ-T is optimized for coupled inductor operation. The FS pin determines mode: tying RFS to VCC configures coupled-inductor mode, while grounding it selects standard inductor mode. This capability is explicitly stated in the Functional Pin Descriptions section (Page 16) and supported by typical application diagrams in the datasheet.
ISL6333IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR11
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6333IRZ-T FAQ
1.How can I place an order for ISL6333IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333IRZ-T 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 ISL6333IRZ-T reliable?
The price and inventory of ISL6333IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6333IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333IRZ-T?
ISL6333IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333IRZ-T 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 ISL6333IRZ-T?
For technical support, including ISL6333IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333IRZ-T requirements.
6.How does Aetrix verify that ISL6333IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6333IRZ-T 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 ISL6333IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6333IRZ-T?
All ISL6333IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333IRZ-T, 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 ISL6333IRZ-T part is unused and in its original packaging.
Return procedure for ISL6333IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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