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Renesas ISL6334ACRZ-T
- Part No.:
- ISL6334ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334ACRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6334ACRZ-T from Renesas (formerly Intersil) is a VR11.1-compliant 4-phase PWM controller for microprocessor core voltage regulation, featuring active phase dropping, diode emulation disabled, ±0.5% closed-loop system accuracy over load/line/temperature, and integrated thermal compensation via NTC sensing on TM pin. It drives synchronous buck stages in parallel to reduce ripple and enable high-efficiency operation across light-to-full load in server and desktop CPU power delivery.
For engineers reviewing the ISL6334ACRZ-T datasheet, ISL6334ACRZ-T pinout, ISL6334ACRZ-T application, or ISL6334ACRZ-T equivalent, key selection criteria include VR11.1 compliance, 0°C to +70°C operating range, 40-lead QFN package, PSI#-driven 1–4 phase scaling without diode emulation, and precision DCR/resistor-based current sensing with IMON reporting.
Technical Context
The ISL6334ACRZ-T implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to minimize output voltage deviation during fast load transients. Its four independent PWM outputs support interleaved operation up to 1MHz per phase, with dynamic VID™ enabling seamless on-the-fly voltage changes per Intel VR11.1 requirements.
Current sensing uses differential inputs (ISENx±) to measure either dedicated sense resistors or inductor DCR, feeding droop control via FB pin and enabling channel-current balancing, average overcurrent protection, and precise IMON-based load monitoring. Thermal compensation is performed internally using digitized NTC voltage from the TM pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase interleaved PWM output for reduced input/output ripple and improved transient response |
| VR Compliance | Fully compliant with Intel VR11.1 specification including Dynamic VID, PSI#, IMON reporting, and load-line (droop) control |
| Accuracy | ±0.5% closed-loop system accuracy over load, line, and temperature (VID = 1V–1.6V, 0°C to +70°C) |
| Switching Frequency | Adjustable up to 1 MHz per phase via external RT resistor; typical 250 kHz at RT = 100 kΩ |
| Operating Temp | 0°C to +70°C ambient - suitable for commercial-grade motherboard and server VR applications |
| Package | 40-lead 6×6 mm QFN (JEDEC MO-220), RoHS-compliant, exposed thermal pad |
| Diode Emulation | Disabled - operates in standard CCM mode during PSI#-initiated phase reduction (unlike ISL6334) |
Pinout & Package
ISL6334ACRZ-T is housed in a 40-lead 6×6 mm QFN package (JEDEC MO-220, pkg drawing L40.6x6) with an exposed thermal pad for enhanced heat dissipation. Pin functions are validated per FN6482 Rev 3.00 datasheet, Page 4 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | Microprocessor voltage ID input | 8-bit digital interface for dynamic core voltage selection per VR11.1; supports on-the-fly VID changes |
| PSI# | Power State Indicator input | Active-low signal triggering 1- or 2-phase operation under light-load conditions; enables high-efficiency CCM mode |
| IMON | Current monitor output | Analog voltage proportional to total load current (0–1.11 V); used by CPU for telemetry and thermal management |
| ISEN1±–ISEN4± | Differential current sense inputs | Four pairs accepting DCR or resistor-based current sensing per phase; enable droop, OCP, and channel balancing |
| PWM1–PWM4 | Gate drive outputs | Four independent PWM signals driving external MOSFET drivers (e.g., ISL6612/ISL6614); support interleaving and phase alignment |
| TM | Thermal monitor input | Connects to NTC thermistor; digitized internally for temperature-compensated current sensing and VR_HOT/VR_FAN generation |
| FB | Feedback reference node | Sinks current proportional to sensed load current to develop precision droop voltage across feedback resistor |
| OFS | Offset programming input | Accepts resistor divider to set bi-directional voltage offset independent of VID setting (e.g., ±10 mV) |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Fully implements Intel VR11.1 protocol including Dynamic VID™, PSI#, IMON reporting, and VR_RDY handshake - no firmware adaptation required |
| Phase Scalability | Supports 1-, 2-, 3-, or 4-phase operation via PSI#; dropped phases enter tri-state - reduces switching/core losses at light load without diode emulation |
| Droop Control Precision | Uses patented current-sense architecture to generate accurate load-line response via FB pin current sink - ensures stable CPU voltage positioning under dynamic loads |
| Integrated Thermal Compensation | Digitizes NTC voltage on TM pin and applies real-time gain adjustment to current-sense amplifiers - maintains ±0.5% accuracy across temperature without external circuitry |
| Robust Protection Suite | Includes average overcurrent protection, per-phase peak current limiting, IMON-clamped OCP, VR_HOT/VR_FAN thermal alerts, and UV/OV detection with hysteresis |
Applications
| Server CPU Power Delivery | Desktop Motherboard VRM |
|---|---|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring tight voltage regulation (<±5 mV) and rapid transient response during burst workloads. IC Role / Device Role / Timing Role: Primary 4-phase VR controller coordinating gate drivers, current sensing, and thermal feedback to maintain VR11.1-compliant core voltage. Use Value: Enables <1% output voltage deviation during 50 A/µs transients while maintaining >90% efficiency at 20% load via adaptive phase shedding. | Use Scenario: ATX motherboard delivering core voltage to Intel Core i7/i9 CPUs with dual-rail memory and PCIe power sequencing. IC Role / Device Role / Timing Role: Central PWM controller managing phase allocation, VID decoding, and IMON telemetry for BIOS/firmware power state coordination. Use Value: Supports seamless Dynamic VID™ transitions and PSI#-driven low-power states - critical for C-states compliance and platform-level energy certification. |
| Workstation GPU Core Supply | High-Performance Computing (HPC) Node VR |
Use Scenario: Dual-GPU or AI accelerator cards demanding stable 0.7–1.2 V core rails with thermal derating and current telemetry. IC Role / Device Role / Timing Role: Core voltage regulator controller interfacing with GPU's thermal sensor via TM pin and reporting load via IMON to host BMC. Use Value: Integrated NTC digitization and IMON output eliminate need for external ADC or current-sense IC - reducing BOM count and layout area. | Use Scenario: Dense compute nodes with clustered CPUs requiring synchronized VR startup, fault logging, and remote voltage margining. IC Role / Device Role / Timing Role: Master VR controller providing EN_PWR/EN_VTT coordination, VR_RDY handshake, and OFS-based voltage offset for margin testing. Use Value: Adjustable soft-start ramp rate and bi-directional OFS offset allow precise in-system validation of voltage tolerance margins without hardware modification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334CRZ-T | Same 4-phase VR11.1 architecture but rated for 0°C to +70°C; identical pinout and feature set except diode emulation disabled | Commercial-temp variant with identical functional behavior - interchangeable where ambient range matches | Select ISL6334CRZ-T only if exact same spec and temp grade is required; ISL6334ACRZ-T is functionally identical and preferred for new designs |
| ISL6334IRZ-T | Industrial-grade version (-40°C to +85°C); otherwise identical electrical specs and pinout | Required for extended-temperature environments such as industrial PCs or telecom baseband units | Choose ISL6334IRZ-T when operation beyond +70°C is needed; not drop-in due to different temp qualification and potential reliability testing requirements |
Compared with ISL6334CRZ-T and ISL6334IRZ-T, the ISL6334ACRZ-T offers identical VR11.1 functionality and pin compatibility but is specifically optimized for cost-sensitive commercial applications where 0°C to +70°C operation suffices - eliminating unnecessary industrial-grade qualification overhead without sacrificing performance.
Availability
ISL6334ACRZ-T is available at Aetrix Electronics and suitable for server CPU power delivery, desktop motherboard VRMs, workstation GPU core supplies, and high-performance computing node VR applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL6334ACRZ-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 Corporation acquired Intersil in 2017 and continues to manufacture and support its high-performance analog and power management portfolio.
The ISL6334ACRZ-T belongs to Renesas' VR11.x multiphase controller product line, engineered specifically for Intel-compatible microprocessor core voltage regulation with emphasis on transient response, light-load efficiency, and integrated telemetry.
FAQ
What is the operating temperature range for the ISL6334ACRZ-T?
The ISL6334ACRZ-T is specified for 0°C to +70°C ambient operation, making it suitable for commercial-grade server, desktop, and workstation applications where extended industrial temperature range is not required. This differs from the ISL6334IRZ-T (-40°C to +85°C) and aligns with the ISL6334CRZ-T spec. Thermal performance is validated per θJA = 32°C/W and θJC = 2°C/W for the 40-lead QFN package.
Does the ISL6334ACRZ-T support diode emulation mode?
No, the ISL6334ACRZ-T does not support diode emulation. Unlike the ISL6334, the "A" suffix denotes disabled diode emulation - during PSI#-initiated phase reduction, remaining active phases operate in standard continuous conduction mode (CCM) compatible with drivers like ISL6612/ISL6614. This simplifies driver selection and avoids special PWM protocols required for discontinuous mode.
How does the ISL6334ACRZ-T implement load-line (droop) regulation?
The ISL6334ACRZ-T implements droop regulation by sinking current from the FB pin proportional to sensed load current (via ISENx± inputs). This current develops a precision voltage drop across the external feedback resistor, creating a controlled voltage decrease with increasing load - ensuring stable CPU voltage positioning per VR11.1 requirements without external op-amps or compensation networks.
What is the function of the TM pin on the ISL6334ACRZ-T?
The TM pin on the ISL6334ACRZ-T connects to an NTC thermistor and provides digitized temperature data to the internal thermal compensation engine. This enables real-time correction of current-sense amplifier gain and offset, maintaining ±0.5% system accuracy across temperature - critical for reliable droop control and overcurrent protection without external calibration components.
Can the ISL6334ACRZ-T be used with both DCR and discrete resistor current sensing?
Yes, the ISL6334ACRZ-T supports both DCR-based and discrete resistor-based current sensing via its differential ISENx± inputs. The controller automatically adapts sensing gain and filtering based on external component selection, enabling flexible design trade-offs between cost (resistor), efficiency (DCR), and PCB area - all while preserving accuracy and protection integrity.
ISL6334ACRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
ISL6334ACRZ-T FAQ
1.How can I place an order for ISL6334ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334ACRZ-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 ISL6334ACRZ-T reliable?
The price and inventory of ISL6334ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6334ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334ACRZ-T?
ISL6334ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334ACRZ-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 ISL6334ACRZ-T?
For technical support, including ISL6334ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334ACRZ-T requirements.
6.How does Aetrix verify that ISL6334ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6334ACRZ-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 ISL6334ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6334ACRZ-T?
All ISL6334ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334ACRZ-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 ISL6334ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6334ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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