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Renesas ISL6334CRZ
- Part No.:
- ISL6334CRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334CRZ.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,855
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Product details
Overview
ISL6334CRZ from Renesas (formerly Intersil) is a VR11.1-compliant 4-phase PWM controller for microprocessor core voltage regulation, featuring active phase adding/dropping, diode emulation, ±0.5% closed-loop system accuracy over load/line/temperature, and integrated thermal compensation via NTC sensing. It drives synchronous buck stages in high-performance desktop/server CPU power delivery.
For engineers reviewing the ISL6334CRZ datasheet, ISL6334CRZ pinout, ISL6334CRZ application, or ISL6334CRZ equivalent, key selection criteria include its 0°C to +70°C operating range, 40-lead QFN package, Intel VR11.1 compliance, light-load efficiency enhancement via PSI#-triggered 1-/2-phase operation, and precision droop control using DCR or discrete sense resistors.
Technical Context
The ISL6334CRZ implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to minimize output ripple and improve transient response across 1–4 active phases. Its current sensing architecture supports both resistor-based and DCR-based methods with integrated temperature compensation via TM/TCOMP pins.
It delivers dynamic VID™-enabled on-the-fly voltage changes using an 8-bit VID interface, while maintaining tight load-line (droop) regulation through FB-pin current sourcing and precision offset programming via the OFS pin - all coordinated by a dedicated error amplifier with 96 dB open-loop gain and 80 MHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase interleaved operation with automatic 1-/2-phase drop under PSI# low signal |
| Accuracy | ±0.5% closed-loop system accuracy (VID = 1V–1.6V, 0°C to +70°C) |
| Switching Frequency | Adjustable up to 1 MHz per phase (typ. 250 kHz with 100 kΩ RT) |
| Current Sensing | Differential ISEN+/- inputs supporting DCR or discrete resistor sensing with thermal compensation |
| Thermal Monitoring | NTC-based via TM pin; digitized internally for VR_HOT/VR_FAN outputs and current-sense compensation |
| VID Interface | 8-bit VR11-compatible VID with Dynamic VID™ for seamless on-the-fly voltage changes |
| Package | 40-lead 6×6 mm QFN (JEDEC MO-220), RoHS-compliant, exposed thermal pad |
Pinout & Package
ISL6334CRZ is housed in a 40-lead 6×6 mm QFN package (JEDEC MO-220, pkg drawing L40.6x6) with exposed thermal pad for enhanced thermal performance. Pin functions are validated per FN6482 Rev 3.00 datasheet, Page 4 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core supply input | +5 V ±5% main bias rail; POR threshold at 4.3–4.5 V rising |
| GND | Reference ground | IC bias reference; bottom thermal pad is GND-connected |
| EN_PWR / EN_VTT | Enable inputs | Threshold-sensitive (0.85 V typ.) for coordinated startup with driver and VTT rails |
| PWM1–PWM4 | Gate drive outputs | Four independent PWM signals driving external synchronous buck drivers |
| ISEN1+ to ISEN4- | Current sense inputs | Differential inputs per phase for DCR/resistor-based current monitoring |
| IMON | Load current monitor output | Analog current-proportional output for microprocessor IMON reporting |
| PSI# | Power state indicator input | Active-low signal triggering phase reduction and diode emulation mode |
| TM / TCOMP | Thermal monitoring interface | NTC thermistor connection (TM) and compensation output (TCOMP) for temperature-aware current sensing |
| VID0–VID7 | VR11.1 voltage ID inputs | 8-bit parallel interface defining target output voltage per Intel specification |
| FB / VDIFF / VSEN / RGND | Feedback network interface | Differential remote sensing (VDIFF/VSEN/RGND) and droop-setting FB current sink |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Fully compliant with Intel VR11.1 specification including PSI#, IMON reporting, and Dynamic VID™ |
| Light-Load Efficiency | Diode emulation + 1-/2-phase operation under PSI# reduces switching/core losses at low load |
| Precision Droop Control | Programmable load line via FB pin current sourcing and OFS-adjustable offset |
| Integrated Thermal Compensation | On-die digitization of NTC voltage (TM) enables real-time correction of current-sense gain vs. temperature |
| Multiphase Transient Response | APP/APA modulation and active phase alignment reduce output capacitor count while maintaining <100 ns load-step response |
Applications
| Desktop CPU Voltage Regulator | Server Processor Power Delivery |
|---|---|
Use Scenario: High-current core voltage regulation for Intel LGA115x/2011 CPUs with rapid load transients during turbo boost. IC Role / Device Role / Timing Role: Primary 4-phase VR controller managing PWM timing, phase alignment, droop, and IMON reporting to CPU. Use Value: Enables ≤±5 mV regulation window at 150 A loads while reducing output capacitance by 30% vs. single-phase designs. | Use Scenario: Dual-socket Xeon E5/E7 platforms requiring coordinated multi-rail sequencing and thermal-aware current limiting. IC Role / Device Role / Timing Role: Core VR controller interfacing with VR_RDY, PSI#, and VR_HOT signals for system-level power management. Use Value: Integrated thermal compensation maintains ±0.5% accuracy across 0–70°C ambient, eliminating external calibration components. |
| Workstation GPU Core Supply | High-Performance Computing (HPC) FPGA Core Rail |
Use Scenario: Stable 0.8–1.2 V core supply for NVIDIA Quadro or AMD Radeon Pro GPUs under variable compute loads. IC Role / Device Role / Timing Role: Multiphase controller delivering fast transient response (<5 µs) and precise droop-controlled voltage positioning. Use Value: APP/APA modulation suppresses input/output ripple, allowing smaller ceramic capacitors and lower ESR solutions. | Use Scenario: Programmable logic core voltage for Xilinx UltraScale+ or Intel Stratix 10 FPGAs with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: VR11.1-compliant controller supporting Dynamic VID™ updates during partial reconfiguration events. Use Value: 8-bit VID interface and ±0.5% accuracy ensure stable operation across multiple VCCINT operating points without firmware recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334ACRZ | No diode emulation; uses standard CCM PWM during PSI# mode; same 0°C to +70°C range and pinout | Suitable where driver ICs lack DE support (e.g., ISL6612/ISL6596), but sacrifices light-load efficiency vs. ISL6334CRZ | Select ISL6334ACRZ only when paired with non-DE-capable drivers or when diode emulation introduces timing conflicts in layout |
| ISL6334IRZ | Extended -40°C to +85°C temperature range; identical functionality and pinout | Required for industrial or server environments with wider ambient operating temperatures | Choose ISL6334IRZ for deployments outside commercial temperature envelope; otherwise ISL6334CRZ offers cost and thermal optimization for desktop use |
Compared with ISL6334ACRZ, ISL6334CRZ delivers higher light-load efficiency via diode emulation but requires DE-enabled drivers like ISL6622; versus ISL6334IRZ, it trades extended temperature rating for lower cost and optimized thermal performance in 0–70°C systems.
Availability
ISL6334CRZ is available at Aetrix Electronics and suitable for desktop CPU voltage regulators, server processor power delivery, and high-performance computing FPGA core supplies requiring stable component supply and full VR11.1 compliance.
Supply support for ISL6334CRZ 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 continues to support its high-performance analog and power management portfolio.
The ISL6334CRZ belongs to Renesas' VR11.x multiphase controller product line, designed specifically for Intel-compliant microprocessor core voltage regulation with emphasis on transient response, light-load efficiency, and thermal-aware current sensing.
FAQ
What is the operating temperature range of the ISL6334CRZ?
The ISL6334CRZ is rated for operation from 0°C to +70°C ambient temperature, as confirmed in the Ordering Information table (Page 3) and Operating Conditions section (Page 9) of FN6482 Rev 3.00. This commercial-grade range distinguishes it from the industrial-grade ISL6334IRZ (-40°C to +85°C) and aligns with typical desktop motherboard thermal profiles. The ISL6334CRZ datasheet specifies thermal resistance θJA = 32°C/W for the 40-lead QFN package.
Does the ISL6334CRZ support diode emulation, and how does it differ from ISL6334ACRZ?
Yes, the ISL6334CRZ supports diode emulation (DE) during PSI#-activated light-load operation, transmitting a special PWM protocol recognized only by DE-capable drivers such as ISL6622/ISL6620. In contrast, ISL6334ACRZ uses standard CCM PWM in PSI# mode and works with any Intersil driver (e.g., ISL6612, ISL6596). This makes ISL6334CRZ more efficient at light loads but requires compatible driver ICs - a key functional distinction documented in the Controller and Driver Recommendation section (Page 4) of the ISL6334CRZ datasheet.
How does the ISL6334CRZ implement thermal compensation for current sensing?
The ISL6334CRZ uses the TM pin to read voltage from an external NTC thermistor (e.g., Vishay NTHS0805N02N6801), digitizes this value internally, and applies real-time gain adjustment to the current-sense amplifiers via the TCOMP pin. This integrated thermal compensation ensures consistent current measurement accuracy across temperature - critical for maintaining ±0.5% system regulation and reliable overcurrent protection. The method is detailed in Sections "Thermal Monitoring" and "Integrated Temperature Compensation" (Pages 23–24) of FN6482 Rev 3.00.
What is the function of the OFS pin on the ISL6334CRZ?
The OFS (Offset) pin on the ISL6334CRZ allows bi-directional, adjustable reference-voltage offset programming that is independent of the VID setting. When connected to ground via a resistor, it sources ~400 mV; when tied to VCC, it sinks ~1.6 V below VCC. This enables fine-tuning of output voltage positioning (e.g., for margining or custom droop slopes) without altering the base VID-defined voltage - a feature explicitly cited in the datasheet's Features list (Page 1) and Electrical Specifications table (Page 10).
Is the ISL6334CRZ pin-compatible with other members of the ISL6334x family?
Yes, the ISL6334CRZ is fully pin-compatible with ISL6334ACRZ, ISL6334IRZ, and ISL6334AIRZ - all share identical 40-lead QFN packaging, pin configuration (Page 4), and functional pin mapping. Differences are limited to internal firmware behavior (e.g., DE support), temperature grade, and minor electrical tolerances - not pin assignment or mechanical footprint. This allows direct substitution in existing layouts when changing temperature grade or light-load efficiency requirements, provided driver compatibility and system-level timing constraints are verified.
ISL6334CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR11.1
- Voltage - Input:
- 3V ~ 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:
- 40-QFN (6x6)
ISL6334CRZ FAQ
1.How can I place an order for ISL6334CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334CRZ 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 ISL6334CRZ reliable?
The price and inventory of ISL6334CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334CRZ is usually 5 days.
3.What payment methods are accepted for ISL6334CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334CRZ?
ISL6334CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334CRZ 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 ISL6334CRZ?
For technical support, including ISL6334CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334CRZ requirements.
6.How does Aetrix verify that ISL6334CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6334CRZ 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 ISL6334CRZ meets industry standards.
7.What is the process for return or replacement of ISL6334CRZ?
All ISL6334CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334CRZ, 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 ISL6334CRZ part is unused and in its original packaging.
Return procedure for ISL6334CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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