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Renesas ISL6336IRZ-T
- Part No.:
- ISL6336IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6336IRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6336IRZ-T from Renesas (formerly Intersil) is a 6-phase PWM controller for microprocessor core voltage regulation, supporting 1–6-phase interleaved synchronous-buck operation with Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation, ±0.6% system accuracy over –40°C to +85°C, and Intel VR11.1 compliance for server and high-end desktop CPU power delivery.
For engineers reviewing the ISL6336IRZ-T datasheet, ISL6336IRZ-T pinout, ISL6336IRZ-T application, or ISL6336IRZ-T equivalent, key selection considerations include light-load phase-dropping behavior via PSI#, DCR/resistor current sensing with integrated temperature compensation, IMON current monitoring output, differential remote sensing (VDIFF/VSEN/RGND), and programmable soft-start ramp rate and switching frequency up to 1 MHz per phase.
Technical Context
The ISL6336IRZ-T implements proprietary APP modulation with dual-edge PWM control and APA feedback to minimize transient response latency and improve load-step recovery. It supports dynamic phase dropping (to 1- or 2-phase) and diode emulation under PSI# assertion, reducing switching losses at light loads while maintaining fast reactivation on load surge.
Current sensing uses either dedicated sense resistors or inductor DCR with programmable temperature compensation via TCOMP, enabling precision droop programming, channel-current balancing, and average overcurrent protection. The controller integrates a unity-gain differential remote-sense amplifier (VSEN/RGND → VDIFF), a 1.12 V clamped IMON current monitor, and VR_RDY/VR_HOT/VR_FAN thermal status outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–6-phase interleaved buck control; enables scalable power delivery with reduced input/output ripple and smaller passive components. |
| System Accuracy | ±0.6% VID over –40°C to +85°C (ISL6336IRZ-T); ensures tight core voltage regulation across full thermal and load range for modern CPUs. |
| Switching Frequency | Adjustable up to 1 MHz per phase via FS pin resistor; allows optimization of efficiency vs. size trade-offs in high-density VRMs. |
| Current Sensing | Supports both DCR and discrete resistor sensing with integrated temperature compensation (TCOMP); maintains droop accuracy and OCP stability over temperature. |
| IMON Output | Clamped current-output monitor (1.085–1.14 V trip); provides real-time average load current signal for telemetry and system-level power management. |
| PSI# Light-Load Mode | Triggers proprietary phase dropping + optional diode emulation; reduces core and switching losses without sacrificing transient readiness. |
| VID Interface | 8-bit VR11-compliant VID input with Dynamic VID™; enables seamless on-the-fly voltage changes during CPU P-state transitions. |
Pinout & Package
ISL6336IRZ-T is housed in a 48-lead QFN package (7 mm × 7 mm, JEDEC MO-220 compliant) with exposed thermal pad (GND). Pin functions are validated per FN6504 Rev 2.00 datasheet, Page 2 (top view) and Page 10 (functional description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core supply input | +5 V ±5% main bias rail; powers internal logic, modulators, and amplifiers; requires local R/C decoupling. |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | 0.752–0.870 V activation thresholds; coordinate startup sequencing with driver ICs and VTT regulator. |
| VID[7:0] | Digital voltage identification interface | 8-bit VR11 code input; sets target output voltage; supports Dynamic VID™ for runtime adjustments. |
| PWM[6:1] | Phase gate-drive control outputs | Open-drain PWM signals; phase count configured by tying PWM3–PWM6 to VCC; sequential firing order. |
| ISEN[6:1]+ / ISEN[6:1]− | Differential current sense inputs | Per-phase current measurement; supports DCR or resistor sensing; inactive channels left open. |
| IMON | Average current monitor output | Current-source output; 1.11 V typical clamp voltage; used for load telemetry and OCP with external R-C filter (≥300 µs time constant). |
| PSI# | Power state indicator input | Active-low signal triggering light-load mode: drops active phases and enables diode emulation for higher efficiency. |
| VDIFF / VSEN / RGND | Differential remote-sense interface | VSEN/RGND form precision differential amplifier; VDIFF feeds FB for accurate load-line regulation and protection. |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 Compliance | Meets specification requirements for CPU core voltage regulation including VID coding, droop, transient response, and protection timing. |
| Active Pulse Positioning (APP) | Dual-edge PWM modulation that dynamically adjusts pulse edges to minimize output voltage deviation during rapid load transients. |
| Adaptive Phase Alignment (APA) | Real-time phase skew correction based on channel current imbalance; improves current sharing and reduces thermal stress across MOSFETs. |
| Programmable Temperature Compensation | TCOMP pin accepts resistor divider to scale thermal coefficient of DCR/resistor sense element; maintains OCP and droop accuracy over –40°C to +85°C. |
| Differential Remote Voltage Sensing | VSEN/RGND inputs eliminate ground potential differences between controller and load; improves regulation accuracy and fault detection reliability. |
| Dynamic VID™ Technology | Enables seamless, glitch-free VID updates during CPU P-state transitions without requiring soft-start restart or output disturbance. |
Applications
| Server CPU Core VRM | High-End Desktop Processor Power |
|---|---|
|
Use Scenario: Regulating core voltage for multi-core Xeon or EPYC processors under dynamic workloads with rapid load steps (e.g., turbo boost, AVX execution). IC Role / Device Role / Timing Role: Primary 6-phase PWM controller managing phase interleaving, droop, current balancing, and PSI#-driven light-load optimization. Use Value: Enables <1% voltage deviation during 50 A/µs load transients while maintaining >90% efficiency at 10% load via phase dropping and diode emulation. |
Use Scenario: Delivering tightly regulated 0.8–1.5 V core power to high-clock-speed gaming CPUs (e.g., Ryzen 7000, Core i9) with aggressive thermal constraints. IC Role / Device Role / Timing Role: Central VR11.1-compliant controller coordinating six synchronous buck stages, remote sensing, and thermal monitoring (VR_HOT/VR_FAN). Use Value: Achieves ±0.6% system accuracy across –40°C to +85°C and supports coupled-inductor topologies to reduce board area by 30% versus discrete inductors. |
| Data Center GPU Voltage Regulation | Workstation CPU Power Delivery |
|
Use Scenario: Supplying stable core voltage to AI accelerators and data-center GPUs with high peak currents (>400 A) and strict ripple limits. IC Role / Device Role / Timing Role: Multiphase controller driving parallel buck stages with DCR current sensing and integrated temperature compensation for long-term droop stability. Use Value: Reduces required output capacitance by 40% via 6× ripple frequency multiplication and supports IMON-based power telemetry for firmware-level power capping. |
Use Scenario: Powering professional workstation CPUs (e.g., Threadripper, Xeon W) requiring precise load-line control, robust overcurrent protection, and thermal-aware throttling. IC Role / Device Role / Timing Role: Precision core voltage controller implementing bi-directional offset adjustment, channel-current limiting, and open-sense-line protection. Use Value: Delivers ±0.5% regulation accuracy over life, line, load, and temperature while enabling VR_RDY-synchronized system boot and fault reporting via OVP/VR_RDY pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6336ACRZ-T | Same architecture but rated for 0°C to +70°C ambient; lacks extended temperature qualification of ISL6336IRZ-T. | Suitable for commercial-grade motherboards or non-extended-temperature industrial systems. | Select ISL6336ACRZ-T only if operating temperature stays within 0–70°C; not qualified for automotive or harsh-environment use. |
| RT8803AGQW | 6-phase VR12.5-compliant controller with integrated MOSFET drivers; no IMON output or TCOMP; different pinout and VID mapping. | Targets newer CPU platforms requiring VR12.5; lacks PSI#-based diode emulation and DCR temperature compensation. | Use RT8803AGQW only when upgrading to VR12.5 platforms; ISL6336IRZ-T remains preferred for VR11.1 systems requiring legacy compatibility and thermal-compensated current sensing. |
Compared with ISL6336ACRZ-T, the ISL6336IRZ-T adds –40°C to +85°C operation and extended reliability validation; compared with RT8803AGQW, it retains VR11.1 compliance, IMON telemetry, and integrated TCOMP-critical for thermally stable droop and OCP in legacy high-performance computing designs.
Availability
ISL6336IRZ-T is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VRMs, data center GPU power supplies, and workstation CPU voltage regulation requiring stable component supply and long-lifecycle support.
Supply support for ISL6336IRZ-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 technical and supply chain support for the ISL6336 family. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.
The ISL6336IRZ-T belongs to Renesas' high-performance power management IC portfolio, designed specifically for Intel-compatible microprocessor core voltage regulation with emphasis on transient response, light-load efficiency, and thermal robustness in dense computing platforms.
FAQ
What is the operating temperature range of the ISL6336IRZ-T?
The ISL6336IRZ-T is specified for –40°C to +85°C ambient operating temperature, making it suitable for industrial and extended-temperature server and workstation applications. This rating is confirmed in the FN6504 datasheet, Table "Operating Conditions", and distinguishes it from the commercial-grade ISL6336CRZ-T (0°C to +70°C). Thermal derating is not required within this range when used with proper PCB copper pour and thermal vias under the exposed pad.
Does the ISL6336IRZ-T support DCR current sensing with temperature compensation?
Yes, the ISL6336IRZ-T supports both discrete resistor and inductor DCR current sensing, with integrated programmable temperature compensation via the TCOMP pin. A resistor divider connected to TCOMP scales the thermal coefficient applied to both droop programming and overcurrent protection thresholds, ensuring stable performance across –40°C to +85°C. This function is explicitly detailed in the "Current Sensing" and "TCOMP" sections of FN6504 Rev 2.00.
How does the PSI# pin affect phase operation in the ISL6336IRZ-T?
When PSI# is asserted low, the ISL6336IRZ-T enters light-load mode by actively dropping phases down to 1- or 2-phase operation and enabling diode emulation on active phases-reducing switching and conduction losses. Upon de-assertion, dropped phases are seamlessly re-added to sustain heavy-load transients. This behavior is documented in the "Features" and "PSI# Input" sections of FN6504 and is specific to the ISL6336 (not ISL6336A) variant.
What is the purpose of the IMON pin on the ISL6336IRZ-T?
The IMON pin on the ISL6336IRZ-T provides a current-source output proportional to the average sum of all active phase currents. With an external resistor-to-ground, it generates a voltage (clamped at 1.085–1.14 V) used for real-time load telemetry and overcurrent shutdown. A minimum 300 µs RC time constant is required per datasheet recommendations to ensure stable OCP response and noise immunity.
Is the ISL6336IRZ-T compatible with VR11.1-compliant microprocessors?
Yes, the ISL6336IRZ-T is fully compliant with Intel's VR11.1 specification, including 8-bit VR11 VID coding, droop programming, active phase alignment, transient response requirements, and protection timing. This compliance is stated on the first page of FN6504 and verified across electrical specifications such as system accuracy, VID threshold levels, and VR_RDY timing behavior.
ISL6336IRZ-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 VR11.1
- Voltage - Input:
- 3V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6336IRZ-T FAQ
1.How can I place an order for ISL6336IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6336IRZ-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 ISL6336IRZ-T reliable?
The price and inventory of ISL6336IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6336IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6336IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6336IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6336IRZ-T?
ISL6336IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6336IRZ-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 ISL6336IRZ-T?
For technical support, including ISL6336IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6336IRZ-T requirements.
6.How does Aetrix verify that ISL6336IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6336IRZ-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 ISL6336IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6336IRZ-T?
All ISL6336IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6336IRZ-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 ISL6336IRZ-T part is unused and in its original packaging.
Return procedure for ISL6336IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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