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Renesas ISL6333CRZ
- Part No.:
- ISL6333CRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333CRZ.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,583
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Product details
Overview
ISL6333CRZ 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 operates in 0°C to +70°C ambient and targets high-performance CPU power delivery.
For engineers reviewing the ISL6333CRZ datasheet, ISL6333CRZ pinout, ISL6333CRZ application, or ISL6333CRZ equivalent, key selection considerations include its 48-lead QFN package, integrated DCR current sensing, Active Pulse Positioning (APP) modulation for transient response, and compatibility with coupled inductors and Intel Eaglelake platform timing requirements.
Technical Context
The ISL6333CRZ implements a fully differential, continuous DCR current sensing architecture across three phases, enabling precise load-line programming and channel current balancing without external sense resistors. Its adaptive control loop includes APP modulation and Adaptive Phase Alignment (APA) to accelerate initial response to high di/dt load transients.
It integrates gate drivers with programmable bias (PUVCC: +5V to +12V), supports dynamic VID compensation via the DVC pin, and provides dual-level overvoltage protection (OVP) with 175mV threshold above DAC voltage plus hysteresis. The controller uses an internal LDO for BYP1 regulation and supports selectable switching frequency up to 1.0 MHz per phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to +70°C - Validated for commercial-temperature CPU VR applications. |
| System Accuracy | ±0.5% over temp (1.000V–1.600V range) - Enables tight core voltage tolerance for modern CPUs. |
| Switching Frequency | Up to 1.0 MHz per phase - Allows smaller output inductors and reduced bulk capacitance. |
| VID Interface | 8-bit TTL-compatible inputs - Directly interfaces with Intel VR11.1-compliant processors for dynamic voltage scaling. |
| Current Sensing | Fully differential DCR sensing with integrated programmable RISEN - Eliminates need for external current sense resistors; enables accurate per-phase current balance. |
| Oscillator Accuracy | ±10% (250 kHz typ., RT = 100 kΩ) - Ensures stable multi-phase synchronization and predictable ripple frequency. |
| Gate Drive Strength | UGATE: 2.0 Ω source / 1.35 Ω sink; LGATE: 1.35 Ω source / 0.90 Ω sink - Supports fast switching of low-RDS(on) MOSFETs with minimal dead-time loss. |
Pinout & Package
ISL6333CRZ is housed in a Pb-free, RoHS-compliant 48-lead 7 mm × 7 mm QFN package (PKG DWG # L48.7x7) with exposed thermal pad. Pin 49 is GND (underside thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1+/ISEN1− | Channel 1 DCR current sense differential input | Enables accurate, noise-immune current measurement for phase balancing and OCP. |
| UGATE1/LGATE1/BOOT1/PHASE1 | Channel 1 upper/lower gate drive interface | Direct connection to external MOSFETs; integrated shoot-through protection and bootstrap charge path. |
| VSEN/RGND | Differential remote voltage sense inputs | Compensates for PCB IR drop between regulator and CPU VDD/VSS pins for precision regulation. |
| IMON | Average output current monitor output | Provides analog voltage proportional to total load current for system telemetry or thermal management. |
| PSI# | Power State Indicator input | Triggers single-phase operation and diode emulation mode to maximize light-load efficiency. |
| VID0–VID7 | VR11.1 DAC reference voltage selection inputs | Configures output voltage per Intel VR11 DAC table; supports dynamic VID transitions during runtime. |
| RSET | Internal current sense resistor programming | Single external resistor sets effective RISEN value; eliminates calibration drift and layout sensitivity. |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 Compliance | Includes IMON, PSI#, 8-bit VID, and dynamic VID compensation - ensures seamless integration with Intel Core i-series and Xeon E3/E5 platforms. |
| Active Pulse Positioning (APP) | Reduces initial transient undershoot by dynamically adjusting pulse timing across phases - cuts required bulk capacitance by up to 30%. |
| Diode Emulation Mode (DEM) | Disables lower MOSFETs during light load to eliminate reverse conduction loss - improves efficiency below 10% load. |
| Gate Voltage Optimization Technology (GVOT) | Lowers Channel 1 LGATE drive voltage during light load - reduces gate charge loss and enhances sub-1A efficiency. |
| Integrated Programmable Current Sense | Eliminates external RSENSE components and associated layout errors - improves production yield and long-term stability. |
Applications
| Desktop CPU Power Delivery | Server Processor VRM |
|---|---|
Use Scenario: Regulating core voltage for Intel Core i7/i9 desktop processors with dynamic VID and aggressive load transients. IC Role / Device Role / Timing Role: Three-phase buck controller with integrated drivers, remote sensing, and PSI#-driven phase shedding. Use Value: Achieves ±0.5% voltage accuracy at 1.2V output while reducing output capacitor count via APP modulation and fast transient response. |
Use Scenario: High-current VRM for dual-socket Xeon E5 servers requiring robust overcurrent protection and thermal margin. IC Role / Device Role / Timing Role: Primary PWM controller managing three interleaved phases with differential DCR sensing and multi-tier OVP/UVP. Use Value: Enables precise channel current balancing and fault detection across 100+ A loads, supporting ASHRAE A3/A4 thermal environments. |
| Embedded Computing Platform | Workstation Graphics VRM |
Use Scenario: Powering Intel Atom or Core m-series SoCs in fanless embedded systems with strict efficiency and thermal constraints. IC Role / Device Role / Timing Role: Compact, integrated controller supporting 2-phase or 3-phase operation and diode emulation for <1W idle power. Use Value: Delivers >90% efficiency at 5A load via DEM and GVOT, minimizing heatsink size and acoustic noise. |
Use Scenario: GPU core voltage regulation for NVIDIA Quadro or AMD Radeon Pro cards with rapid load steps during rendering workloads. IC Role / Device Role / Timing Role: Fast-response PWM controller using APA and APP to suppress voltage droop during 100A/µs GPU load transients. Use Value: Reduces peak undershoot to <25 mV, eliminating need for costly polymer tantalum capacitors on graphics module PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6333BCRZ | Includes CPURST_N pin; droop always enabled; no IDROOP pin; same 0°C to +70°C rating. | Required for Intel Eaglelake chipset platforms needing CPURST_N coordination with PSI#. | Select ISL6333BCRZ when Eaglelake compatibility or guaranteed droop behavior is mandatory; not drop-in due to pinout difference (CPURST_N vs IDROOP). |
| ISL6333ACRZ | No diode emulation mode; no Gate Voltage Optimization; droop enabled/disabled via IDROOP pin; same package and VID interface. | Suitable for cost-sensitive designs where light-load efficiency below 5% is non-critical. | Choose ISL6333ACRZ when DEM/GVOT are unnecessary and simpler control logic is preferred; shares identical pinout and footprint. |
Compared with ISL6333CRZ, ISL6333BCRZ adds platform-specific reset coordination but removes IDROOP configurability, while ISL6333ACRZ trades light-load features for reduced complexity-both require validation of PSI# interaction and droop implementation in final design.
Availability
ISL6333CRZ is available at Aetrix Electronics and suitable for desktop CPU power delivery, server processor VRMs, and embedded computing platforms requiring stable component supply, long-lifecycle support, and validated Intel VR11.1 compliance.
Supply support for ISL6333CRZ 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 maintains full technical and supply chain continuity for its high-performance analog and power management portfolio.
The ISL6333CRZ belongs to Renesas' VR11.1-compliant multi-phase controller family, engineered specifically for precision, high-efficiency CPU core voltage regulation in performance computing and datacenter applications.
FAQ
What is the operating temperature range for the ISL6333CRZ?
The ISL6333CRZ is rated for 0°C to +70°C ambient operation, as confirmed in the FN6520 datasheet ordering table and Recommended Operating Conditions section. This commercial-grade rating aligns with desktop and embedded CPU VRM use cases, distinguishing it from industrial-grade variants like ISL6333CIRZ (–40°C to +85°C). Thermal shutdown activates at +160°C junction temperature.
Does the ISL6333CRZ support diode emulation mode?
Yes, the ISL6333CRZ supports diode emulation mode (DEM) during light-load conditions when the PSI# pin is asserted low. As documented in the Controller Descriptions table (Page 4), DEM disables lower MOSFETs to eliminate reverse conduction loss-this feature is shared with ISL6333B but omitted in ISL6333A and ISL6333C variants.
How does the ISL6333CRZ implement current sensing without external resistors?
The ISL6333CRZ uses fully differential, continuous DCR current sensing with integrated, user-programmable current sense resistors. A single external resistor on the RSET pin configures the effective RISEN value, eliminating discrete sense resistors and associated layout sensitivity. This is confirmed in the Features list and Electrical Specifications (IDROOP/ISEN parameters).
What is the function of the APA pin on the ISL6333CRZ?
The APA (Adaptive Phase Alignment) pin on the ISL6333CRZ sinks a precise 100 µA current and connects to the COMP node via an external resistor to set the trip level for phase alignment circuitry. This enables dynamic adjustment of phase timing to improve transient response-detailed in the Functional Pin Descriptions (Page 16) and Block Diagram (Page 6).
Can the ISL6333CRZ be used in two-phase configurations?
Yes, the ISL6333CRZ supports two-phase operation. As stated in the Features list and confirmed in the Pin Descriptions (Page 17), tying ISEN3– to VCC reconfigures the controller from three-phase to two-phase mode-enabling flexible design reuse across different power levels without changing the IC.
ISL6333CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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)
ISL6333CRZ FAQ
1.How can I place an order for ISL6333CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333CRZ 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 ISL6333CRZ reliable?
The price and inventory of ISL6333CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333CRZ is usually 5 days.
3.What payment methods are accepted for ISL6333CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333CRZ?
ISL6333CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333CRZ 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 ISL6333CRZ?
For technical support, including ISL6333CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333CRZ requirements.
6.How does Aetrix verify that ISL6333CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6333CRZ 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 ISL6333CRZ meets industry standards.
7.What is the process for return or replacement of ISL6333CRZ?
All ISL6333CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333CRZ, 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 ISL6333CRZ part is unused and in its original packaging.
Return procedure for ISL6333CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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