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Renesas ISL6333CCRZ-T
- Part No.:
- ISL6333CCRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6333CCRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,354
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Product details
Overview
ISL6333CCRZ-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 up to 1.0MHz per-phase switching, and features Active Pulse Positioning (APP) modulation and Adaptive Phase Alignment (APA) for high di/dt transient response in server and desktop CPU power delivery.
For engineers reviewing the ISL6333CCRZ-T datasheet, ISL6333CCRZ-T pinout, ISL6333CCRZ-T application, or ISL6333CCRZ-T equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and validated alternative options for VR11.1 multi-phase CPU power designs requiring light-load efficiency, differential remote sensing, and PSI#-driven phase dropping.
Technical Context
The ISL6333CCRZ-T 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 integrated drivers support variable gate bias (5V–12V) and include shoot-through protection, adaptive non-overlap timing, and dynamic VID compensation via the DVC pin.
This variant operates in 0°C to +70°C ambient, uses a 48-lead 7×7 QFN package with exposed thermal pad, and omits both Diode Emulation Mode (DEM) and Gate Voltage Optimization Technology (GVOT). Unlike ISL6333/ISL6333B, it lacks IDROOP but includes CPURST_N for simplified Eaglelake chipset PSI# coordination and always-enabled droop via FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Three-phase synchronous buck PWM controller with integrated high- and low-side MOSFET drivers |
| Input Compatibility | Intel VR11.1 compliant: 8-bit VID interface, IMON current monitor, PSI# phase-dropping control, VR_RDY status |
| Accuracy | ±0.5% system voltage accuracy over temperature (1.000V–1.600V range), enabled by differential remote sensing (VSEN/RGND) |
| Switching Frequency | Adjustable 80kHz–1.0MHz per phase via FS pin resistor; supports standard and coupled-inductor modes |
| Protection Features | Multi-tiered overvoltage/undervoltage detection, per-channel overcurrent trip (138µA typical avg.), open-sense-line prevention, thermal shutdown at 160°C |
| Operating Temp | 0°C to +70°C ambient, qualified per JEDEC J-STD-020 Pb-free reflow profile |
| Package | 48-lead 7mm × 7mm QFN with exposed thermal pad (PKG DWG L48.7x7), RoHS-compliant matte tin finish |
Pinout & Package
ISL6333CCRZ-T is housed in a 48-lead 7×7 mm QFN package with exposed thermal pad (L48.7x7 drawing). Pin functions are identical to ISL6333C as confirmed in FN6520 Rev 3.00 Pages 4 and 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | VR11 DAC input | 8-bit TTL-compatible inputs selecting core voltage per Intel VR11 table; internal 40µA pull-ups |
| PSI# | Power State Indicator | Active-low digital input triggering single-phase operation and higher-efficiency light-load mode |
| CPURST_N | CPU Reset Input | Enables proper PSI# sequencing with Intel Eaglelake chipsets; eliminates need for external reset logic |
| VSEN / RGND | Differential remote sense inputs | Connect to load sense points to compensate for PCB IR drop; enables ±0.5% regulation accuracy |
| IMON | Average output current monitor | Analog voltage output proportional to total load current; used for telemetry and OCP scaling |
| UGATE1–3 / LGATE1–3 | Integrated driver outputs | Direct gate-drive outputs for upper/lower MOSFETs; include adaptive non-overlap and shoot-through protection |
| ISEN1±–ISEN3± | Phase current sense inputs | Differential inputs for DCR-based current sensing; enable channel balancing and load-line programming |
| FB / COMP / APA | Error amplifier interface | FB = inverting input; COMP = output; APA = sets trip threshold for adaptive phase alignment circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 Compliance | Full support including IMON, PSI#, VR_RDY, 8-bit VID, and dynamic VID compensation - ensures drop-in compatibility with Intel CPU platforms |
| Adaptive Phase Alignment (APA) | Reduces initial transient response time by aligning pulse edges across phases, allowing fewer bulk capacitors and lower BOM cost |
| Active Pulse Positioning (APP) | Optimizes pulse placement during high di/dt load steps to minimize output voltage deviation and improve regulation stability |
| Integrated Current Sensing | User-programmable RSET resistor configures internal DCR sense gain; eliminates external current-sense resistors and associated layout complexity |
| Eaglelake-Compatible PSI# Control | CPURST_N pin synchronizes PSI# state transitions with CPU reset, removing need for discrete timing circuits on Eaglelake-based motherboards |
Applications
| Server CPU Power Delivery | Desktop Motherboard VRM |
|---|---|
Use Scenario: High-current, dynamically scaled core voltage supply for dual-socket Xeon processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary three-phase PWM controller managing Vcore regulation, phase dropping via PSI#, and real-time current monitoring via IMON. Use Value: Enables <1% voltage deviation under 50A/µs load transients while maintaining VR11.1 compliance and reducing bulk capacitor count by 30% via APP/APA. |
Use Scenario: Compact, cost-optimized VRM on ATX desktop motherboards supporting Core i7/i9 CPUs with Turbo Boost. IC Role / Device Role / Timing Role: Integrated controller-driver IC delivering precise Vcore regulation with differential remote sensing and automatic light-load phase shedding. Use Value: Achieves ±0.5% system accuracy across temperature and load, eliminating need for external current-sense resistors and reducing PCB area by 22% vs. discrete controller+driver solutions. |
| Workstation GPU Core Supply | High-Performance Computing Node |
Use Scenario: Multi-phase core rail for professional GPUs (e.g., NVIDIA A-series) requiring tight voltage tolerance and fast transient recovery. IC Role / Device Role / Timing Role: Three-phase buck controller with APA-modulated gate drive timing to suppress output ripple during GPU shader clock bursts. Use Value: Delivers sub-10mV undershoot on 30A step loads using only four 220µF polymer caps - enabled by differential sensing and APP-driven pulse optimization. |
Use Scenario: Scalable CPU power subsystem in HPC blade servers where thermal density and long-term reliability are critical. IC Role / Device Role / Timing Role: VR11.1-compliant controller with CPURST_N synchronization ensuring deterministic PSI# entry/exit during CPU sleep/wake cycles. Use Value: Guarantees seamless transition between full three-phase and single-phase operation without voltage glitch, extending component lifetime under cyclic thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase VR11.1 CPU voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6333CIRZ | Same functionality and pinout, but rated for -40°C to +85°C industrial temperature range; requires higher-grade ceramic decoupling | Suitable for extended-temperature embedded systems (e.g., telecom baseband cards) where ambient exceeds +70°C | Select ISL6333CIRZ when operating outside 0°C–70°C; otherwise ISL6333CCRZ-T offers identical performance at lower cost |
| RT8803AGQW | Single-chip 3+1 phase VR12.5 controller with integrated drivers; supports 0.25V–1.52V output, 1.2MHz max frequency, and digital SVID interface | Targets newer Intel platforms (Skylake onward); lacks VR11.1-specific PSI# and IMON analog output | Choose RT8803AGQW only for SVID-based designs; ISL6333CCRZ-T remains optimal for legacy VR11.1 motherboard upgrades and Eaglelake compatibility |
Compared with ISL6333CIRZ and RT8803AGQW, the ISL6333CCRZ-T uniquely balances VR11.1 compliance, Eaglelake CPURST_N integration, and commercial-temperature cost efficiency - making it the most direct fit for socket LGA775/LGA1156 motherboard VRM redesigns.
Availability
ISL6333CCRZ-T is available at Aetrix Electronics and suitable for server CPU power delivery, desktop motherboard VRMs, workstation GPU core supplies, and high-performance computing nodes requiring stable component supply and long-term industrial availability.
Supply support for ISL6333CCRZ-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 maintains full support for its high-performance analog and power management portfolio, including VR11-compliant controllers.
The ISL6333CCRZ-T belongs to Renesas' legacy VR11 multi-phase controller family, engineered specifically for precision core voltage regulation in Intel-based computing platforms with emphasis on light-load efficiency and transient response.
FAQ
What is the operating temperature range of the ISL6333CCRZ-T?
The ISL6333CCRZ-T is specified for 0°C to +70°C ambient operation, as confirmed in the FN6520 Rev 3.00 datasheet Table "Recommended Operating Conditions". This commercial-grade rating distinguishes it from the industrial-grade ISL6333CIRZ (-40°C to +85°C) and aligns with standard desktop and server motherboard thermal envelopes.
Does the ISL6333CCRZ-T support diode emulation mode (DEM)?
No, the ISL6333CCRZ-T does not support diode emulation mode. Per FN6520 Rev 3.00 Page 4 "Controller Descriptions and Comments", DEM is only enabled in ISL6333 and ISL6333B variants. The ISL6333CCRZ-T operates exclusively in continuous conduction mode (CCM) and relies on PSI#-driven phase dropping for light-load efficiency.
How does the CPURST_N pin function in the ISL6333CCRZ-T?
The CPURST_N pin on the ISL6333CCRZ-T is a dedicated digital input that synchronizes PSI# state transitions with CPU reset signaling on Intel Eaglelake platforms. As documented on FN6520 Page 4, it eliminates external circuitry needed for proper PSI# timing, ensuring deterministic low-power entry/exit without voltage glitches during CPU sleep/wake cycles.
What package type and footprint does the ISL6333CCRZ-T use?
The ISL6333CCRZ-T uses a 48-lead 7mm × 7mm QFN package with exposed thermal pad (drawing L48.7x7), as stated in the "Ordering Information" table on FN6520 Page 2. It is Pb-free (RoHS-compliant) with matte tin (e3) termination and qualifies for standard SnPb and Pb-free reflow profiles per IPC/JEDEC J-STD-020.
Can the ISL6333CCRZ-T be used with coupled inductors?
Yes, the ISL6333CCRZ-T supports coupled inductor operation. Per FN6520 Page 16, the FS pin determines mode: tying the FS resistor to VCC configures coupled-inductor mode, while grounding it selects standard inductor mode. This flexibility allows optimization of ripple current cancellation and component count in space-constrained VRM layouts.
ISL6333CCRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
ISL6333CCRZ-T FAQ
1.How can I place an order for ISL6333CCRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6333CCRZ-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 ISL6333CCRZ-T reliable?
The price and inventory of ISL6333CCRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6333CCRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6333CCRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6333CCRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6333CCRZ-T?
ISL6333CCRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6333CCRZ-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 ISL6333CCRZ-T?
For technical support, including ISL6333CCRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6333CCRZ-T requirements.
6.How does Aetrix verify that ISL6333CCRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6333CCRZ-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 ISL6333CCRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6333CCRZ-T?
All ISL6333CCRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6333CCRZ-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 ISL6333CCRZ-T part is unused and in its original packaging.
Return procedure for ISL6333CCRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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