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Renesas ISL6333BCRZ
- Part No.:
- ISL6333BCRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333BCRZ.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,918
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Product details
Overview
ISL6333BCRZ from Renesas (formerly Intersil) is a three-phase buck PWM controller with integrated MOSFET drivers, designed for Intel VR11.1 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 and diode emulation mode for light-load efficiency. It operates in 0°C to +70°C ambient and integrates Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) for high di/dt transient response in server and desktop CPU power delivery.
For engineers reviewing the ISL6333BCRZ datasheet, ISL6333BCRZ pinout, ISL6333BCRZ application, or ISL6333BCRZ equivalent, key selection considerations include its CPURST_N pin support for Eaglelake chipset compatibility, integrated DCR current sensing without external resistors, gate drive bias flexibility (5V–12V), and 48-pin 7×7 QFN package with thermal pad.
Technical Context
The ISL6333BCRZ 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 control loop integrates APP modulation and APA circuitry to accelerate initial transient response-reducing required bulk capacitance-and uses dynamic VID compensation via the DVC pin for stable voltage transitions during frequency/voltage scaling.
It features dual-level overvoltage protection (OVP), undervoltage lockout (UVLO) on VCC/PVCC/BYP1, and open-sense-line prevention logic. The CPURST_N pin eliminates external timing circuitry needed for proper PSI# sequencing on Intel Eaglelake platforms, while the always-enabled droop function routes current through the FB pin instead of IDROOP-distinguishing it from ISL6333/ISL6333A variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Three-phase synchronous buck PWM controller with integrated high- and low-side MOSFET drivers |
| Input Voltage Range (PVCC) | +5V to +12V - powers upper/lower gate drivers; enables optimization of Rds(on) trade-off vs. switching loss |
| 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) - ensures tight core voltage regulation under thermal stress |
| Switching Frequency | Adjustable up to 1.0 MHz per phase - supports high-density designs with smaller magnetics and faster transient response |
| Thermal Protection | Over-temperature shutdown at 160°C with 100°C hysteresis - prevents thermal runaway during sustained overload |
| Package | 48-lead 7×7 mm QFN with exposed thermal pad - provides low θJC = 1.5°C/W for efficient heat dissipation |
Pinout & Package
ISL6333BCRZ is housed in a Pb-free, RoHS-compliant 48-lead 7×7 mm QFN package (PKG DWG L48.7x7) with an exposed thermal pad on the underside for enhanced thermal performance. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPURST_N | Digital control input | Enables native PSI# sequencing for Intel Eaglelake chipsets-eliminates need for external RC delay networks |
| PSI# | Power state indicator input | Triggers automatic transition to single-phase operation and diode emulation mode for light-load efficiency |
| IMON | Analog current monitor output | Provides average output current signal for telemetry, thermal management, or system-level load monitoring |
| VSEN / RGND | Differential remote sense inputs | Enable precision voltage regulation at load point by compensating for PCB IR drop between regulator and CPU |
| ISEN1+/ISEN1−, ISEN2+/ISEN2−, ISEN3+/ISEN3− | Phase current sense inputs | Support fully differential DCR sensing per channel-no external current sense resistors required |
| UGATE1/2/3, LGATE1/2/3 | Gate drive outputs | Integrated drivers deliver fast rise/fall times (UGATE: 26ns rise, 18ns fall; LGATE: 18ns rise, 12ns fall) with adaptive non-overlap |
Key Features
| Feature | Design Value |
|---|---|
| CPURST_N integration | Removes external timing components required for PSI# synchronization on Intel Eaglelake platforms-reduces BOM count and layout complexity |
| Always-enabled droop | Droop current flows directly from FB pin (no IDROOP pin), simplifying compensation network and ensuring consistent load-line behavior |
| APP + APA modulation | Reduces peak output voltage deviation during high di/dt transients-enables fewer bulk capacitors and lower solution cost |
| Integrated programmable RISEN | Single external RSET resistor configures internal current sense gain-eliminates discrete sense resistors and improves noise immunity |
| Dynamic VID compensation (DVC) | External RC network on DVC→FB smooths voltage transitions during VID changes-prevents overshoot/undershoot during frequency scaling |
Applications
| Server CPU Power Delivery | Desktop Platform VR11.1 Regulation |
|---|---|
Use Scenario: High-current, multi-core Xeon or Core i7 processors requiring precise core voltage regulation with rapid load-step response. IC Role / Device Role / Timing Role: Three-phase PWM controller managing 30–150A output with integrated drivers, remote sensing, and PSI#-driven phase shedding. Use Value: ±0.5% system accuracy and APP/APA reduce output capacitor count by up to 30%, lowering board area and cost. | Use Scenario: Mainboard VRM design for Intel 45nm/32nm desktop CPUs with VR11.1 compliance requirements. IC Role / Device Role / Timing Role: Primary core voltage controller implementing VID decoding, differential remote sensing, and light-load efficiency modes. Use Value: CPURST_N pin ensures correct PSI# assertion timing per Eaglelake spec-avoids boot failure or instability without external circuitry. |
| Laptop CPU Voltage Regulator | Embedded Computing Power System |
Use Scenario: Compact, thermally constrained mobile platform requiring high-efficiency operation across wide load range (1A–60A). IC Role / Device Role / Timing Role: Three-phase buck controller enabling diode emulation mode and phase dropping below 10A load. Use Value: Gate voltage optimization and droop-enabled load-line improve light-load efficiency by >15% versus fixed-frequency alternatives. | Use Scenario: Industrial embedded CPU module (e.g., COM Express) needing long-lifecycle, RoHS-compliant VR11.1 regulation. IC Role / Device Role / Timing Role: Core voltage controller with robust protection (OVP/UVP/OCP), thermal shutdown, and open-sense-line detection. Use Value: Dual-tier OVP and 160°C thermal shutdown ensure reliable operation in unventilated enclosures with extended temperature cycling. |
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 | No CPURST_N pin; includes IDROOP pin and BYP1 LDO; supports adjustable droop via external resistor | Suitable for legacy VR11.1 platforms without Eaglelake timing constraints; requires external droop resistor network | Select when CPURST_N is unnecessary and flexible droop tuning is preferred over simplified FB-integrated droop |
| ISL6333CIRZ | Same CPURST_N support as ISL6333BCRZ but rated for -40°C to +85°C industrial temp range; no diode emulation mode | Targeted at extended-temperature embedded systems where light-load efficiency is secondary to thermal robustness | Select for industrial or automotive-adjacent applications requiring wider operating temperature range and Eaglelake compatibility without DEM |
Compared with ISL6333CRZ and ISL6333CIRZ, the ISL6333BCRZ uniquely combines CPURST_N support, diode emulation mode, and 0°C to +70°C commercial rating-making it optimal for cost-sensitive desktop/server VRMs where Eaglelake timing integrity and light-load efficiency are critical.
Availability
ISL6333BCRZ is available at Aetrix Electronics and suitable for server CPU power delivery, desktop motherboard VRMs, and embedded computing platforms requiring stable component supply, RoHS compliance, and Intel VR11.1 specification adherence.
Supply support for ISL6333BCRZ 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 support for the ISL6333 family. Renesas is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs.
The ISL6333 series belongs to Renesas' high-performance CPU voltage regulator controller product line, engineered specifically for Intel VR11.1-compliant multi-phase core power delivery in servers, desktops, and high-end embedded systems.
FAQ
What is the primary function of the CPURST_N pin on the ISL6333BCRZ?
The CPURST_N pin on the ISL6333BCRZ is a digital input that synchronizes PSI# assertion timing with Intel Eaglelake chipset reset sequencing. It eliminates the need for external RC delay networks traditionally required to meet Eaglelake's strict PSI# setup/hold timing, ensuring reliable low-power state entry during processor reset. This functionality is exclusive to ISL6333BCRZ and ISL6333C variants-not present in ISL6333 or ISL6333A.
Does the ISL6333BCRZ support diode emulation mode, and how is it activated?
Yes, the ISL6333BCRZ supports diode emulation mode (DEM). It is automatically activated when the PSI# pin is driven low, triggering transition to single-phase operation and disabling synchronous rectification in the inactive phases. This reduces switching losses at light loads. Unlike ISL6333A, ISL6333BCRZ retains DEM capability-confirmed in the datasheet's Controller Descriptions table and block diagram (Page 8).
How does the ISL6333BCRZ implement current sensing without external resistors?
The ISL6333BCRZ uses fully differential, continuous DCR current sensing with integrated programmable current sense resistors. A single external RSET resistor connected from the RSET pin to VCC sets the effective gain of internal RISEN elements. This eliminates discrete current sense resistors, reduces board space, and improves noise immunity-verified in the Functional Pin Descriptions (Page 17) and Electrical Specifications (Page 14).
What is the thermal performance specification for the ISL6333BCRZ package?
The ISL6333BCRZ uses a 48-lead 7×7 mm QFN package with exposed thermal pad, specified with θJC = 1.5°C/W and θJA = 28°C/W (measured on high-thermal-conductivity test board). Maximum junction temperature is +150°C, with thermal shutdown activating at 160°C and recovery at 100°C-data confirmed in Absolute Maximum Ratings (Page 13) and Thermal Information tables.
Can the ISL6333BCRZ operate in two-phase mode, and how is it configured?
Yes, the ISL6333BCRZ supports two-phase operation. It is configured by tying the ISEN3− pin to VCC, which disables Channel 3 and reassigns its control logic to Channels 1 and 2. This configuration is explicitly documented in the Functional Pin Descriptions (Page 17) and supported across all ISL6333 family variants including ISL6333BCRZ.
ISL6333BCRZ 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)
ISL6333BCRZ FAQ
1.How can I place an order for ISL6333BCRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333BCRZ 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 ISL6333BCRZ reliable?
The price and inventory of ISL6333BCRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333BCRZ is usually 5 days.
3.What payment methods are accepted for ISL6333BCRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333BCRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333BCRZ?
ISL6333BCRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333BCRZ 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 ISL6333BCRZ?
For technical support, including ISL6333BCRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333BCRZ requirements.
6.How does Aetrix verify that ISL6333BCRZ is sourced from the original manufacturer or authorized distributors?
All ISL6333BCRZ 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 ISL6333BCRZ meets industry standards.
7.What is the process for return or replacement of ISL6333BCRZ?
All ISL6333BCRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333BCRZ, 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 ISL6333BCRZ part is unused and in its original packaging.
Return procedure for ISL6333BCRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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