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Renesas ISL6333ACRZ-T
- Part No.:
- ISL6333ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333ACRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,752
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Product details
Overview
ISL6333ACRZ-T from Renesas Electronics (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 PSI#-enabled phase dropping for light-load efficiency. It operates in 48-lead 7×7 QFN package and targets high-performance CPU power delivery in desktop and server platforms.
For engineers reviewing the ISL6333ACRZ-T datasheet, ISL6333ACRZ-T pinout, ISL6333ACRZ-T application, or ISL6333ACRZ-T equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, validated alternatives, and supply-chain-ready availability details - all grounded in the FN6520 Rev 3.00 datasheet and official Renesas documentation.
Technical Context
The ISL6333ACRZ-T implements fully differential, continuous DCR current sensing across three phases using internal programmable sense resistors-requiring only a single external RSET resistor. It integrates Active Pulse Positioning (APP) modulation and Adaptive Phase Alignment (APA) to accelerate transient response during high di/dt load steps, reducing bulk capacitor count.
Unlike the ISL6333 and ISL6333B variants, the ISL6333A lacks Diode Emulation Mode (DEM) and Gate Voltage Optimization Technology (GVOT), and does not include the CPURST_N pin. Its droop functionality remains enabled via the IDROOP pin connected to FB, and it uses separate PVCC1, PVCC2, and PVCC3 supplies for independent lower-driver biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | Adjustable up to 1.0 MHz per phase; enables optimized trade-off between switching loss and output filter size. |
| System Accuracy | ±0.5% over temperature (1.000–1.600 V range); ensures tight core voltage regulation under thermal stress. |
| VID Interface | 8-bit TTL-compatible input; directly selects VR11 DAC output voltages without external level-shifting. |
| Current Sensing | Fully differential DCR sensing with integrated RISEN resistors; eliminates need for external sense resistors and improves channel current balance. |
| Protection Features | Multi-tiered overvoltage/undervoltage detection, per-channel overcurrent trip (138 µA typ), open-sense-line prevention, and thermal shutdown at 160°C. |
| Operating Temp Range | 0°C to +70°C; validated for commercial-grade motherboard and embedded computing applications. |
| Package | 48-lead 7×7 mm QFN (Pb-free, RoHS compliant); exposes thermal pad for efficient heat dissipation in dense CPU VRMs. |
Pinout & Package
ISL6333ACRZ-T is housed in a 48-lead 7×7 mm QFN package with exposed thermal pad (PKG DWG # L48.7x7). Pin functions are defined per the ISL6333A-specific top-view diagram on page 3 of FN6520 Rev 3.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1+/ISEN1− | Phase 1 DCR current sense inputs | Differential sensing node for channel 1 current; enables precise load-line programming and balancing. |
| UGATE1/LGATE1 | Upper/lower gate drivers for Phase 1 | Integrated 1.35 Ω sink / 1.35 Ω source lower-driver and 1.35 Ω sink / 2.0 Ω source upper-driver outputs. |
| VSEN/RGND | Remote voltage sense inputs | Compensates for IR drop between VRM and CPU die; supports precision differential feedback path. |
| IMON | Average output current monitor | Analog voltage output proportional to total load current; used for telemetry and system-level power management. |
| PSI# | Power State Indicator input | Logic-low signal triggers single-phase operation and disables DEM; improves light-load efficiency without firmware changes. |
| IDROOP | Droop current sense output | Connects to FB to implement output voltage droop proportional to load current; stabilizes multi-phase current sharing. |
| VID0–VID7 | VR11 DAC voltage identification inputs | Directly configure core voltage per Intel VR11.1 specification; no external DAC or logic required. |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 Compliance | Full support for IMON monitoring, PSI#-driven phase dropping, and 8-bit VID decoding - validated for Eaglelake and later CPU platforms. |
| Integrated Three-Phase Drivers | Eliminates six external driver ICs; reduces BOM count, PCB area, and layout complexity in CPU VRMs. |
| Active Pulse Positioning (APP) | Reduces initial transient response time by dynamically shifting pulse edges - lowers peak undershoot during sudden load steps. |
| Differential Remote Sensing | Rejects common-mode noise and compensates for PCB trace resistance; maintains ±0.5% regulation at CPU socket. |
| Programmable Soft-Start | Configurable ramp rate (0.156–6.25 mV/µs) via external RSS resistor; prevents inrush current and ensures controlled power-up sequencing. |
Applications
| Desktop CPU Power Delivery | Server Processor VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Intel Xeon processors in 1U rack servers with strict thermal and efficiency requirements. IC Role / Device Role / Timing Role: Primary three-phase PWM controller managing gate drive timing, current balancing, and dynamic VID updates across all phases. Use Value: Enables stable 0.8–1.5 V output with <±0.5% accuracy at full load, while reducing bulk capacitance by 30% via APP/APA-enhanced transient response. |
Use Scenario: Powering high-end Core i7/i9 CPUs in enthusiast desktop motherboards with overclocking support and real-time telemetry. IC Role / Device Role / Timing Role: Central VR11.1-compliant controller coordinating phase alignment, droop compensation, and remote sensing feedback loop. Use Value: Delivers fast load-step response (<5 µs recovery) and accurate IMON-based current reporting for BIOS power limiting and thermal throttling. |
| Embedded Computing Platform | Workstation Graphics Power |
Use Scenario: Providing tightly regulated core voltage to Intel Atom or Celeron-based industrial controllers operating in extended temperature environments. IC Role / Device Role / Timing Role: Three-phase buck controller with integrated drivers and robust OVP/UVP protection for unattended 24/7 operation. Use Value: Maintains ±0.5% regulation from 0°C to +70°C ambient, with thermal shutdown at 160°C junction temperature for long-term reliability. |
Use Scenario: Supplying GPU core voltage in high-end workstations where transient load spikes exceed 100 A/µs during compute-intensive rendering. IC Role / Device Role / Timing Role: High-bandwidth PWM controller implementing APA-modulated phase alignment to minimize output voltage deviation. Use Value: Reduces required output capacitance by enabling faster transient recovery - critical for space-constrained GPU VRM layouts. |
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 | Includes Diode Emulation Mode (DEM) and Gate Voltage Optimization Technology (GVOT); same pinout and VID interface. | Better light-load efficiency in single-phase mode; requires additional external circuitry for PSI# handling on Eaglelake platforms. | Select when highest low-load efficiency is prioritized and CPURST_N is not needed. |
| ISL6333BIRZ-T | Supports CPURST_N for simplified Eaglelake chipset integration; removes IDROOP pin; droop always active via FB pin. | Designed for -40°C to +85°C industrial operation; replaces IDROOP functionality with fixed FB-based droop. | Select for extended temperature range and direct compatibility with Intel Eaglelake reference designs. |
Compared with ISL6333ACRZ-T, the ISL6333CRZ-T adds DEM/GVOT for superior light-load efficiency but lacks CPURST_N support, while the ISL6333BIRZ-T extends temperature range and simplifies Eaglelake integration at the cost of configurable droop - making ISL6333ACRZ-T optimal for cost-sensitive commercial desktop VRMs requiring VID-based flexibility and standard thermal performance.
Availability
ISL6333ACRZ-T is available at Aetrix Electronics and suitable for desktop motherboard design, server VRM development, and embedded computing platforms requiring stable component supply, full RoHS compliance, and verified Intel VR11.1 interoperability.
Supply support for ISL6333ACRZ-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 Corporation is a global semiconductor leader delivering trusted embedded solutions, including high-performance analog and power management ICs for computing infrastructure.
The ISL6333 family was developed by Intersil (acquired by Renesas in 2017) specifically to address Intel VR11.1 microprocessor power delivery requirements - emphasizing precision regulation, multi-phase coordination, and adaptive efficiency modes for next-generation CPUs.
FAQ
What is the operating temperature range for the ISL6333ACRZ-T?
The ISL6333ACRZ-T is rated for 0°C to +70°C ambient operation, as specified in the FN6520 Rev 3.00 datasheet under Recommended Operating Conditions. This commercial-grade range aligns with standard desktop motherboard environments and excludes extended industrial or automotive use cases. The device incorporates thermal shutdown at 160°C junction temperature for safety.
Does the ISL6333ACRZ-T support Intel VR11.1 specifications?
Yes, the ISL6333ACRZ-T is explicitly designed for Intel VR11.1 compliance. It includes dedicated pins (IMON, PSI#), an 8-bit VID interface, differential remote sensing (VSEN/RGND), and dynamic VID compensation (DVC) - all confirmed in the FN6520 datasheet's feature list and application diagrams.
How does the ISL6333ACRZ-T differ from the ISL6333CRZ-T?
The ISL6333ACRZ-T omits Diode Emulation Mode (DEM) and Gate Voltage Optimization Technology (GVOT), and lacks the CPURST_N pin present in ISL6333B/C variants. Unlike ISL6333CRZ-T, it uses separate PVCC1/PVCC2/PVCC3 supplies instead of PVCC1/PVCC2_3, and retains the IDROOP pin for configurable droop.
What package type and footprint does the ISL6333ACRZ-T use?
The ISL6333ACRZ-T uses a 48-lead 7×7 mm QFN package with exposed thermal pad (drawing L48.7x7), as documented in the Ordering Information table on page 2 of FN6520 Rev 3.00. It is Pb-free and RoHS compliant, with MSL3 moisture sensitivity rating per JEDEC J-STD-020.
Can the ISL6333ACRZ-T operate in two-phase mode?
Yes, the ISL6333ACRZ-T supports two-phase operation. As stated on page 17 of FN6520 Rev 3.00, tying ISEN3− to VCC configures the controller for two-phase mode. All other control, sensing, and protection features remain fully functional in this configuration.
ISL6333ACRZ-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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6333ACRZ-T FAQ
1.How can I place an order for ISL6333ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333ACRZ-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 ISL6333ACRZ-T reliable?
The price and inventory of ISL6333ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6333ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333ACRZ-T?
ISL6333ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333ACRZ-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 ISL6333ACRZ-T?
For technical support, including ISL6333ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333ACRZ-T requirements.
6.How does Aetrix verify that ISL6333ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6333ACRZ-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 ISL6333ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6333ACRZ-T?
All ISL6333ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333ACRZ-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 ISL6333ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6333ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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