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Renesas ISL6336ACRZ-T
- Part No.:
- ISL6336ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6336ACRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6336ACRZ-T from Renesas Electronics (formerly Intersil) is a 6-phase PWM controller for microprocessor core voltage regulation, supporting 1–6-phase interleaved synchronous-buck operation with Intel VR11.1 compliance, ±0.5% system accuracy over life/temperature/load, and active phase dropping via PSI# input. It enables high-efficiency power delivery in server CPU VRMs and high-performance computing motherboards.
For engineers reviewing the ISL6336ACRZ-T datasheet, ISL6336ACRZ-T pinout, ISL6336ACRZ-T application, or ISL6336ACRZ-T equivalent, key selection considerations include VR11.1 compliance, DCR/resistor current sensing with integrated temperature compensation, IMON current monitoring output, programmable soft-start ramp rate (0.625–6.25 mV/µs), and compatibility with Intersil drivers including ISL6612, ISL6614, and ISL6620.
Technical Context
The ISL6336ACRZ-T implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to achieve fast transient response without external compensation. Its dual-edge PWM control dynamically adjusts pulse edges across phases to minimize output voltage deviation during load steps.
It supports light-load efficiency enhancement via PSI#-triggered phase dropping (to 1- or 2-phase mode) and optional diode emulation-enabled only with VR11.1 drivers like ISL6622/ISL6620 for ISL6336A variants. Current sensing uses either dedicated sense resistors or inductor DCR with programmable TCOMP scaling for thermal drift correction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases Supported | 1 to 6 interleaved synchronous-buck phases; enables scalable VRM design from low-power client CPUs to high-current server processors. |
| VR Compliance | Fully compliant with Intel VR11.1 specification, including VID code mapping, droop programming, and PSI# protocol timing. |
| System Accuracy | ±0.5% over life, line, load, and temperature (0°C to +70°C) for VID = 1.0–1.6V; ensures tight core voltage regulation under dynamic workloads. |
| Switching Frequency | Adjustable up to 1 MHz per phase via FS pin resistor; allows optimization of efficiency vs. size trade-offs in high-density PCB layouts. |
| Current Sensing | Supports precision DCR or discrete resistor sensing with integrated temperature compensation (TCOMP pin); eliminates manual calibration for thermal drift. |
| IMON Output | Current-mode monitor output (IMON) provides analog average current signal clamped at 1.11 V; enables real-time load telemetry and OCP with 1.11 V trip threshold. |
| Soft-Start Ramp Rate | Programmable from 0.625 to 6.25 mV/µs via SS pin resistor; controls inrush current and prevents overshoot during power-up sequences. |
Pinout & Package
ISL6336ACRZ-T is housed in a 48-lead QFN package (7 mm × 7 mm, 0.5 mm pitch), JEDEC MO-220 compliant, with exposed thermal pad tied to GND. The package supports high-power density VRM designs and efficient heat dissipation in multilayer motherboard stacks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary supply input | +5 V ±5% bias rail; powers internal logic, modulators, and amplifiers; requires local RC decoupling. |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | 0.752–0.850 V thresholds; coordinate startup sequencing with driver ICs and VTT regulator. |
| PSI# | Power State Indicator input | Active-low signal triggering 1-/2-phase operation and diode emulation; determines light-load efficiency mode. |
| PWM1–PWM6 | Phase gate drive outputs | Open-drain PWM signals controlling external MOSFET drivers; phase count set by tying unused PWMx pins to VCC. |
| ISEN1+ / ISEN1− … ISEN6+ / ISEN6− | Differential current sense inputs | Per-phase current measurement for droop, balancing, and OCP; inactive channels left floating. |
| IMON | Average current monitor output | Current-source output proportional to total load current; 1.11 V clamp initiates shutdown on overcurrent. |
| TCOMP | Temperature compensation scaling input | Accepts resistor-divider voltage from TM pin to scale current-sense gain vs. temperature; improves DCR sensing accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Full support for Intel's voltage regulation spec-including 8-bit VID decoding, Dynamic VID™, and PSI# handshake-enabling drop-in integration into certified CPU platforms. |
| Active Pulse Positioning (APP) | Dual-edge PWM modulation reduces output voltage deviation during fast load transients (<100 ns edge rates), minimizing required bulk capacitance. |
| Adaptive Phase Alignment (APA) | Real-time phase skew adjustment maintains optimal interleaving under varying load and temperature, preserving ripple cancellation benefits. |
| Programmable Droop Regulation | Load-line slope set via resistor network between VDIFF and FB; enables precise voltage positioning per Intel VR11.1 requirements. |
| Differential Remote Sensing | VSEN/RGND/VDIFF architecture eliminates ground potential differences between controller and CPU socket, improving regulation accuracy and fault detection. |
Applications
| Server CPU Voltage Regulator Module (VRM) | High-End Desktop Platform VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors under burst workloads (e.g., AI inference, database queries). IC Role / Device Role / Timing Role: Primary 6-phase PWM controller managing phase interleaving, current balancing, and VR11.1-compliant VID updates. Use Value: Enables <1% output voltage deviation during 50 A/µs load steps while maintaining >90% efficiency at 40 A due to APP modulation and phase dropping. |
Use Scenario: Powering enthusiast-grade Core i9 processors in gaming motherboards with overclocking support. IC Role / Device Role / Timing Role: Core voltage controller implementing dynamic droop, remote sensing, and PSI#-driven efficiency modes during idle/gaming transitions. Use Value: Reduces light-load power loss by 35% via 1-phase operation and diode emulation, extending platform battery life in mobile desktop SKUs. |
| Workstation GPU Core Supply | AI Accelerator Board Power Management |
Use Scenario: Delivering stable 0.8–1.2 V core power to high-TDP professional GPUs (e.g., NVIDIA RTX A6000) with rapid load cycling. IC Role / Device Role / Timing Role: Multiphase controller providing IMON-based telemetry, thermal-aware current limiting, and coupled-inductor compatibility. Use Value: Achieves ±3 mV regulation accuracy across -40°C to +70°C ambient using integrated TCOMP and DCR sensing-critical for GPU reliability. |
Use Scenario: Supplying configurable core voltage to FPGA-based AI accelerators with dynamic voltage/frequency scaling (DVFS). IC Role / Device Role / Timing Role: VR11.1-compliant controller enabling seamless on-the-fly VID changes via Dynamic VID™ for workload-adaptive power states. Use Value: Supports sub-10 µs VID transitions without output glitch, allowing real-time power/performance tuning in edge inference applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6336CRZ-T | Same architecture but lacks PSI#-triggered diode emulation; supports only 3-level PWM in light-load mode. | Requires VR11.1 drivers (e.g., ISL6622) for phase-dropping operation; not compatible with ISL6612/ISL6614 in PSI# mode. | Select when VR11.1 driver ecosystem is fixed and diode emulation is unnecessary. |
| RT8803AZSP | 6-phase controller with Intel VR12.0/VR12.5 support; higher max switching frequency (1.2 MHz); no integrated TCOMP scaling. | Targets newer CPU generations requiring VR12.x compliance; lacks native VR11.1 PSI# timing and IMON clamping behavior. | Choose for next-gen platforms needing VR12.x support and higher-frequency operation, accepting external thermal compensation. |
Compared with ISL6336CRZ-T, the ISL6336ACRZ-T offers broader driver compatibility in PSI# mode and simplified light-load implementation; versus RT8803AZSP, it delivers proven VR11.1 interoperability and integrated thermal compensation-but lacks VR12.x readiness.
Availability
ISL6336ACRZ-T is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VRMs, workstation GPU power systems, and AI accelerator board development requiring stable component supply and long-term industrial availability.
Supply support for ISL6336ACRZ-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 legacy Intersil power management products.
The ISL6336ACRZ-T belongs to Intersil's VR11.x-compliant multiphase controller family, designed specifically for high-efficiency, high-transient-response CPU/GPU core voltage regulation in enterprise and high-performance computing platforms.
FAQ
What is the operating temperature range for the ISL6336ACRZ-T?
The ISL6336ACRZ-T is specified for 0°C to +70°C ambient operation, as confirmed in the FN6504 datasheet Absolute Maximum Ratings table. This commercial-grade rating aligns with typical server and desktop motherboard thermal environments where airflow and heatsinking ensure junction temperatures remain below the 150°C maximum limit. The device's θJA of 29°C/W supports reliable operation within this range when mounted on standard 4-layer PCBs with adequate copper pour.
Does the ISL6336ACRZ-T support both DCR and resistor-based current sensing?
Yes, the ISL6336ACRZ-T supports both methods: DCR sensing via ISEN+ and ISEN− pins connected across the inductor's RC network, and discrete resistor sensing using dedicated current sense resistors. The datasheet confirms identical tolerance specs (e.g., 36.5–42 µA sensed current error at 40 µA input) for both configurations, and integrated TCOMP scaling applies equally to compensate thermal drift in either element.
How does the PSI# functionality differ between ISL6336ACRZ-T and ISL6336CRZ-T?
In ISL6336ACRZ-T, PSI# assertion produces standard two-state PWM on active phases, enabling use with non-VR11.1 drivers like ISL6612 and ISL6614. In contrast, ISL6336CRZ-T generates a three-level PWM pattern in PSI# mode, mandating VR11.1-compliant drivers such as ISL6622. This difference is explicitly documented in the "Controller and Driver Recommendations" section of FN6504 Rev 2.00.
What is the purpose of the APA pin on the ISL6336ACRZ-T?
The APA pin sets the Adaptive Phase Alignment trip level via an external resistor to COMP. A 50 µA internal current source flows into APA, and the resulting voltage determines the threshold at which phase alignment correction activates. This allows designers to tune dynamic phase skew correction sensitivity-critical for maintaining ripple cancellation under rapidly changing load conditions in the ISL6336ACRZ-T.
Can the ISL6336ACRZ-T be used in 4-phase or 5-phase configurations?
Yes, the ISL6336ACRZ-T supports 1–6-phase operation. To configure 4-phase mode, tie PWM5 to VCC; for 5-phase, tie PWM6 to VCC. Unused ISEN+ and ISEN− pairs (e.g., ISEN6+/− in 5-phase) must be left unconnected, as stated in the Functional Pin Description on page 10 of FN6504. The controller automatically disables unused channels and balances current across active phases.
ISL6336ACRZ-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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6336ACRZ-T FAQ
1.How can I place an order for ISL6336ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6336ACRZ-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 ISL6336ACRZ-T reliable?
The price and inventory of ISL6336ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6336ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6336ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6336ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6336ACRZ-T?
ISL6336ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6336ACRZ-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 ISL6336ACRZ-T?
For technical support, including ISL6336ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6336ACRZ-T requirements.
6.How does Aetrix verify that ISL6336ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6336ACRZ-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 ISL6336ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6336ACRZ-T?
All ISL6336ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6336ACRZ-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 ISL6336ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6336ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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