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Renesas ISL6333ACRZ
- Part No.:
- ISL6333ACRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333ACRZ.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
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Product details
Overview
ISL6333ACRZ 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 PSI#-enabled phase dropping for light-load efficiency. Used in high-performance desktop and server CPU power delivery systems.
For engineers reviewing the ISL6333ACRZ datasheet, ISL6333ACRZ pinout, ISL6333ACRZ application, or ISL6333ACRZ equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, validated alternative options, and supply-chain-ready availability details - all specific to the ISL6333ACRZ variant with 0°C to +70°C operation and 48-lead QFN packaging.
Technical Context
The ISL6333ACRZ implements fully differential, continuous DCR current sensing across three phases using internal programmable sense resistors-no external sense resistors required. Its Active Pulse Positioning (APP) modulation and Adaptive Phase Alignment (APA) circuitry enable rapid response to high di/dt load transients, reducing bulk capacitor count.
Unlike the ISL6333 and ISL6333B variants, the ISL6333ACRZ omits Diode Emulation Mode and Gate Voltage Optimization Technology, and does not include the CPURST_N pin. It uses separate PVCC1, PVCC2, and PVCC3 pins for independent lower-driver biasing and retains the IDROOP pin for droop programming via FB connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Three-phase synchronous buck PWM controller with integrated high- and low-side gate drivers |
| Input Voltage Range (PVCC) | +5V to +12V ±5% - supports flexible MOSFET gate drive optimization per channel |
| VID Interface | 8-bit TTL-compatible input - selects output voltage per Intel VR11 DAC table (0.4V–1.6V range) |
| System Accuracy | ±0.5% over temperature (1.0V–1.6V range) - enables tight core voltage regulation for modern CPUs |
| Switching Frequency | Adjustable up to 1.0 MHz per phase - allows trade-off between efficiency, size, and transient response |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade motherboard and server board applications |
| Package | 48-lead 7×7 mm QFN (Pb-free, RoHS compliant) - surface-mount compatible with standard reflow profiles |
Pinout & Package
ISL6333ACRZ is housed in a 48-lead 7×7 mm QFN package (PKG DWG # L48.7x7) with exposed thermal pad. Pin functions are identical to the ISL6333A variant as documented in FN6520 Rev 3.00, Page 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1+/ISEN1−, ISEN2+/ISEN2−, ISEN3+/ISEN3− | Differential current sense inputs | Enable per-phase DCR-based current monitoring for load-line programming and channel balancing without external resistors |
| UGATE1/2/3, LGATE1/2/3, BOOT1/2/3, PHASE1/2/3 | Integrated gate driver interfaces | Direct drive of high- and low-side MOSFETs; eliminates need for external drivers and reduces layout complexity |
| VID0–VID7 | VR11.1 DAC reference input | Configures regulated output voltage via Intel-specified 8-bit code; supports dynamic VID transitions |
| PSI#, IMON, VSEN, RGND, FB, COMP | Power-state control and feedback | Enables phase-dropping (PSI#), real-time current monitoring (IMON), remote sensing (VSEN/RGND), and loop compensation (FB/COMP) |
| IDROOP, OFS, RSET, APA, DVC | Programmable analog configuration | Supports voltage droop (IDROOP), offset adjustment (OFS), current sense scaling (RSET), APA trip setting (APA), and dynamic VID smoothing (DVC) |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 compliance | Includes IMON pin for current telemetry, PSI# for phase dropping, and 8-bit VID interface - meets full platform specification requirements |
| Fully differential DCR current sensing | Eliminates external current sense resistors; achieves precise per-phase current balance and accurate load-line programming |
| Active Pulse Positioning (APP) & Adaptive Phase Alignment (APA) | Reduces initial transient response time by >30% vs. conventional multi-phase controllers - lowers required bulk capacitance |
| Programmable voltage offset (OFS) | Enables ±100 mV output voltage adjustment via single external resistor - supports margining and custom load-line tuning |
| Dynamic VID compensation (DVC) | Smooths voltage transitions during VID changes - prevents overshoot/undershoot during CPU P-state transitions |
Applications
| Desktop CPU Power Delivery | Server Processor VRM |
|---|---|
Use Scenario: Regulating core voltage for Intel Core i7/i9 processors on ATX motherboards with VR11.1 support. IC Role / Device Role / Timing Role: Primary three-phase PWM controller managing gate timing, current balancing, and dynamic VID response. Use Value: Enables <1% output voltage deviation under 50 A/µs load steps while maintaining VR11.1 compliance and reducing PCB area by integrating drivers. |
Use Scenario: High-current power stage for dual-socket Xeon platforms requiring stable 12-phase-equivalent regulation. IC Role / Device Role / Timing Role: One ISL6333ACRZ controls three phases; multiple units paralleled for scalable 6-/9-/12-phase designs. Use Value: Delivers ±0.5% system accuracy across -20°C to +60°C ambient, supporting reliable boot and sustained turbo operation. |
| Embedded Computing Platform | Workstation Graphics Power |
Use Scenario: Compact VRM design for fanless industrial PCs using Intel Coffee Lake or Comet Lake CPUs. IC Role / Device Role / Timing Role: Integrated controller + driver solution minimizing BOM count and thermal footprint. Use Value: PSI#-driven single-phase mode cuts quiescent power by 42% at <5 A load - extends system idle time without compromising wake latency. |
Use Scenario: GPU core voltage regulation on high-end workstation graphics cards with multi-GPU synchronization. IC Role / Device Role / Timing Role: Synchronized three-phase controller providing fast transient response for GPU shader clock domains. Use Value: APP+APA reduces peak undershoot to <45 mV during 30 A load steps - maintains GPU stability during compute-intensive rendering. |
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 | Same pinout and feature set but rated for 0°C to +70°C; includes Diode Emulation Mode and Gate Voltage Optimization Technology | Better light-load efficiency in single-phase mode; requires IDROOP-to-FB connection and BYP1 decoupling | Select ISL6333CRZ if Diode Emulation Mode is required and thermal margin allows higher junction temp during PSI#-low operation |
| ISL6333BCRZ | Includes CPURST_N pin and removes IDROOP; droop current routed to FB; PVCC2_3 shared for channels 2/3 | Optimized for Intel Eaglelake chipset platforms; eliminates external CPURST_N conditioning circuitry | Choose ISL6333BCRZ only when interfacing with Eaglelake or compatible chipsets requiring CPURST_N handshake |
Compared with ISL6333ACRZ, ISL6333CRZ adds light-load efficiency enhancements at the cost of slightly higher complexity in droop implementation, while ISL6333BCRZ trades IDROOP configurability for chipset-specific integration - making ISL6333ACRZ the optimal choice for general-purpose VR11.1 designs needing simplicity, precision, and field-proven stability.
Availability
ISL6333ACRZ is available at Aetrix Electronics and suitable for desktop motherboard design, server VRM development, and embedded computing power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ISL6333ACRZ 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 product support, documentation, and qualification for legacy Intersil power management ICs including the ISL6333 family.
The ISL6333 series was developed specifically for Intel VR11.1-compliant CPU voltage regulation, emphasizing precision, transient response, and integration to reduce VRM component count and PCB area in high-density computing platforms.
FAQ
What is the operating temperature range for ISL6333ACRZ?
The ISL6333ACRZ is specified for 0°C to +70°C ambient operation, matching the commercial-grade requirement for mainstream desktop and embedded computing applications. This range is confirmed in the FN6520 Rev 3.00 datasheet, Ordering Information table, and Recommended Operating Conditions section - distinct from the -40°C to +85°C industrial variants (e.g., ISL6333AIRZ).
Does ISL6333ACRZ support Diode Emulation Mode?
No, ISL6333ACRZ does not support Diode Emulation Mode. Per the Controller Descriptions and Comments table in FN6520 Rev 3.00, Diode Emulation Mode is enabled only on ISL6333 and ISL6333B variants. The ISL6333ACRZ transitions to single-phase operation under PSI# low but remains in continuous conduction mode (CCM), without body-diode emulation.
What is the function of the IDROOP pin on ISL6333ACRZ?
The IDROOP pin on ISL6333ACRZ provides average channel-current sense output. When connected directly to the FB pin, it introduces output voltage droop proportional to load current - enabling precise load-line regulation required by Intel VR11.1 specifications. This pin is present and functional on ISL6333ACRZ, unlike ISL6333B and ISL6333C variants where droop is routed internally to FB.
How does ISL6333ACRZ differ from ISL6333CRZ in terms of pin configuration?
ISL6333ACRZ and ISL6333CRZ share identical 48-pin QFN packaging and pinout, but differ in internal functionality: ISL6333CRZ includes Gate Voltage Optimization Technology and Diode Emulation Mode, requiring BYP1 decoupling and PVCC1/LDO use, whereas ISL6333ACRZ uses separate PVCC1/PVCC2/PVCC3 pins and omits those modes - simplifying layout and biasing for standard VRM designs.
Can ISL6333ACRZ be used in two-phase configurations?
Yes, ISL6333ACRZ supports two-phase operation. As stated in the Functional Pin Descriptions (Page 17), tying ISEN3− to VCC configures the device for two-phase mode. All control logic, current balancing, and protection features remain active - enabling flexible design reuse across 2-, 3-, or paralleled multi-phase implementations without firmware or hardware modification.
ISL6333ACRZ 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)
ISL6333ACRZ FAQ
1.How can I place an order for ISL6333ACRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333ACRZ 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 reliable?
The price and inventory of ISL6333ACRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333ACRZ is usually 5 days.
3.What payment methods are accepted for ISL6333ACRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333ACRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333ACRZ?
ISL6333ACRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333ACRZ 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?
For technical support, including ISL6333ACRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333ACRZ requirements.
6.How does Aetrix verify that ISL6333ACRZ is sourced from the original manufacturer or authorized distributors?
All ISL6333ACRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL6333ACRZ?
All ISL6333ACRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333ACRZ, 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 part is unused and in its original packaging.
Return procedure for ISL6333ACRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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