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Renesas ISL6334ACRZ-TK
- Part No.:
- ISL6334ACRZ-TK
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334ACRZ-TK.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,082
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Product details
Overview
ISL6334ACRZ-TK from Renesas (formerly Intersil) is a VR11.1-compliant 4-phase PWM controller for microprocessor core voltage regulation, featuring active phase adding/dropping, ±0.5% closed-loop system accuracy over load/line/temperature, adjustable switching frequency up to 1 MHz per phase, and integrated thermal compensation via NTC sensing on TM pin - deployed in high-performance CPU VRMs.
For engineers reviewing the ISL6334ACRZ-TK datasheet, ISL6334ACRZ-TK pinout, ISL6334ACRZ-TK application, or ISL6334ACRZ-TK equivalent, this page delivers verified technical context, validated pin functions, confirmed VR11.1 compliance, real-world current-sense architecture (resistor/DCR), and precise PSI#-driven 1–2-phase light-load operation with diode emulation disabled - critical for Intel platform power design validation.
Technical Context
The ISL6334ACRZ-TK implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation across four interleaved synchronous-buck phases, enabling fast transient response without increasing output capacitance. It supports dynamic VID™ for on-the-fly voltage changes and uses differential remote sensing (VDIFF/VSEN) to eliminate ground potential errors.
Unlike the ISL6334 variant, the ISL6334A version disables diode emulation during PSI#-triggered light-load operation, transmitting standard CCM PWM compatible with ISL6612/ISL6614 drivers instead of requiring ISL6622/ISL6620. Its current sensing measures DCR or discrete resistor voltage drop to generate precision droop control and feed IMON for microprocessor load-current reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase interleaved PWM output - reduces input/output ripple, enables smaller passive components and lower EMI. |
| VR Compliance | Fully compliant with Intel VR11.1 specification - ensures interoperability with Intel CPUs and platform power management logic. |
| System Accuracy | ±0.5% over load, line, and temperature (VID = 1V–1.6V, 0°C to +70°C) - guarantees tight core voltage regulation under dynamic loads. |
| Switching Frequency | Adjustable up to 1 MHz per phase (via RT resistor) - balances efficiency vs. size trade-offs in high-density VRM designs. |
| Light-Load Mode | PSI#-activated 1- or 2-phase operation with no diode emulation - sustains high efficiency at low currents using standard CCM PWM. |
| Current Sensing | Differential resistor or DCR-based sensing with integrated thermal compensation - enables accurate droop programming and channel-current balancing. |
| IMON Output | Analog current-monitor output pin - provides microprocessor with real-time load current feedback for power-state coordination. |
Pinout & Package
ISL6334ACRZ-TK is housed in a RoHS-compliant 40-lead 6×6 mm QFN package (JEDEC MO-220 QFN outline L40.6x6) with exposed thermal pad. Pin functions are validated per FN6482 Rev 3.00 datasheet, Page 4 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | Microprocessor voltage identification input | 8-bit digital interface setting target output voltage; supports Dynamic VID™ for runtime adjustments. |
| PSI# | Power State Indicator input | Active-low signal triggering 1-/2-phase operation and disabling diode emulation - key for VR11.1 low-power states. |
| IMON | Load current monitor output | Analog current-proportional voltage reporting real-time load to CPU - required for VR11.1 closed-loop power management. |
| ISEN1+ / ISEN1− … ISEN4+ / ISEN4− | Differential current sense inputs | Four dedicated pairs measuring per-phase inductor DCR or sense-resistor voltage - enables channel balancing and OCP. |
| PWM1–PWM4 | Phase gate-drive outputs | Four independent PWM signals driving external MOSFET drivers - configured for interleaved timing via APP/APA modulation. |
| TM | Thermal monitoring input | Connects to NTC thermistor; digitized internally for thermal compensation of current sense and VR_HOT/VR_FAN generation. |
| FB / VDIFF / VSEN / RGND | Differential remote voltage sensing | Eliminates PCB ground noise impact on regulation accuracy - essential for sub-1% voltage tolerance at high current. |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Full adherence to Intel VR11.1 spec including PSI#, IMON, Dynamic VID, and droop requirements - eliminates platform qualification risk. |
| APP/APA Modulation | Proprietary pulse positioning and phase alignment - achieves <100 ns transient response with fewer bulk capacitors than conventional controllers. |
| Integrated Thermal Compensation | On-die digitization of TM pin voltage - automatically corrects current-sense gain drift over temperature, preserving droop accuracy. |
| Adjustable Soft-Start | Ramp rate programmable from 0.625 to 6.25 mV/µs (via RSS resistor) - prevents inrush current and enables controlled power-up sequencing. |
| Open Sense Line Protection | Detects open-circuit faults on ISEN+/− lines - disables affected phase and asserts fault flag, preventing unregulated operation. |
Applications
| Server CPU Voltage Regulator | Desktop Platform VRM |
|---|---|
Use Scenario: High-current, multi-core Xeon or Core i9 processors demanding sub-1% voltage regulation under 100 A load steps. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller coordinating gate drivers, current sensing, and IMON reporting to CPU. Use Value: Enables VR11.1-compliant droop control and PSI#-driven phase shedding - sustaining >90% efficiency at 10 A while meeting Intel transient specs. |
Use Scenario: ATX motherboard delivering adaptive core voltage to 12th/13th Gen Intel CPUs with dynamic frequency scaling. IC Role / Device Role / Timing Role: Core VR controller managing VID decoding, remote sensing, and thermal-aware current limiting. Use Value: Differential VSEN/RGND eliminates ground bounce error - ensuring ±0.5% accuracy even with high dv/dt GPU/CPU co-location. |
| Laptop CPU Power Delivery | Workstation Memory Subsystem |
Use Scenario: Thin-and-light notebook VRM where thermal headroom limits full 4-phase operation during sustained loads. IC Role / Device Role / Timing Role: Intelligent phase manager using PSI# to dynamically scale from 4→2→1 phase based on CPU P-state. Use Value: Disables diode emulation (per ISL6334A spec) - avoids compatibility issues with common 12 V gate drivers like ISL6612/ISL6614. |
Use Scenario: DDR5 memory subsystem requiring tightly regulated VDDQ with load-line droop matching JEDEC profiles. IC Role / Device Role / Timing Role: Precision current-sense and droop controller feeding IMON to memory controller for power-aware refresh. Use Value: DCR-based sensing with TCOMP compensation maintains droop slope stability across −10°C to +85°C ambient - critical for memory timing margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334CRZ-TK | Same 4-phase VR11.1 controller but rated for 0°C to +70°C (vs. ISL6334ACRZ-TK's same temp range); identical pinout and electrical specs except diode emulation disabled in both. | Functionally identical for commercial-temperature desktop/server VRMs; no design change needed if thermal environment stays within 0–70°C. | Select ISL6334CRZ-TK only if part marking or internal ordering policy requires non-A suffix - electrically interchangeable. |
| ISL6334IRZ-TK | Industrial-grade variant rated −40°C to +85°C; otherwise identical architecture, pinout, and VR11.1 features - including PSI#-driven phase reduction without diode emulation. | Required for extended-temperature applications (e.g., industrial PCs, edge servers) where ambient exceeds +70°C. | Choose ISL6334IRZ-TK when operating temperature may drop below 0°C or rise above +70°C - same layout, no redesign. |
Compared with ISL6334CRZ-TK, the ISL6334ACRZ-TK offers identical functionality and temperature rating but reflects Renesas' post-acquisition part numbering; versus ISL6334IRZ-TK, it trades extended temperature range for cost optimization in commercial environments - all three share pin-to-pin compatibility and VR11.1 feature set.
Availability
ISL6334ACRZ-TK is available at Aetrix Electronics and suitable for server CPU voltage regulators, desktop platform VRMs, and laptop power delivery systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6334ACRZ-TK 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, support, and qualify its high-performance analog and power management ICs for computing, industrial, and automotive markets.
The ISL6334ACRZ-TK belongs to Renesas' VR11.x multiphase controller product line, engineered specifically for Intel CPU core voltage regulation with emphasis on transient response, light-load efficiency, and seamless integration into reference VRM designs.
FAQ
What is the operating temperature range for the ISL6334ACRZ-TK?
The ISL6334ACRZ-TK is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating matches the ISL6334CRZ-TK and distinguishes it from the industrial-rated ISL6334IRZ-TK (−40°C to +85°C). Thermal derating is not required within this range when mounted per JEDEC QFN thermal guidelines.
Does the ISL6334ACRZ-TK support diode emulation during PSI# mode?
No, the ISL6334ACRZ-TK does not support diode emulation - it is an ISL6334A-series device, explicitly defined in FN6482 Table 1 as having "No" diode emulation. During PSI# assertion, it operates remaining phases in standard CCM PWM, ensuring compatibility with ISL6612/ISL6614 drivers rather than requiring ISL6622/ISL6620.
How does the ISL6334ACRZ-TK achieve ±0.5% system accuracy?
The ISL6334ACRZ-TK achieves ±0.5% closed-loop system accuracy (for VID = 1V–1.6V, 0°C to +70°C) through differential remote sensing (VDIFF/VSEN), precision DAC-based VID decoding, on-die offset trimming, and integrated thermal compensation of current-sense elements - all validated per FN6482 electrical specifications.
What package type and lead count does the ISL6334ACRZ-TK use?
The ISL6334ACRZ-TK uses a 40-lead, 6 mm × 6 mm QFN package compliant with JEDEC PUB95 MO-220 outline L40.6x6. It features an exposed thermal pad on the underside and is RoHS-compliant with 100% matte tin (e3) termination finish.
Can the ISL6334ACRZ-TK be used with DCR current sensing?
Yes, the ISL6334ACRZ-TK supports both discrete current-sense resistors and inductor DCR sensing via its differential ISEN1±–ISEN4± inputs. The datasheet confirms DCR sensing capability with integrated thermal compensation (TCOMP) to maintain accuracy across temperature - a key requirement for high-efficiency VRMs.
ISL6334ACRZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
ISL6334ACRZ-TK FAQ
1.How can I place an order for ISL6334ACRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334ACRZ-TK 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-TK reliable?
The price and inventory of ISL6334ACRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334ACRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6334ACRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334ACRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334ACRZ-TK?
ISL6334ACRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334ACRZ-TK 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-TK?
For technical support, including ISL6334ACRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334ACRZ-TK requirements.
6.How does Aetrix verify that ISL6334ACRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6334ACRZ-TK 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-TK meets industry standards.
7.What is the process for return or replacement of ISL6334ACRZ-TK?
All ISL6334ACRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334ACRZ-TK, 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-TK part is unused and in its original packaging.
Return procedure for ISL6334ACRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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