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Renesas ISL6336CRZ-T
- Part No.:
- ISL6336CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6336CRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,381
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Product details
Overview
ISL6336CRZ-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 temperature/load/line, and active phase dropping via PSI# input. It delivers precision droop control, DCR/resistor current sensing, and IMON current monitoring output for high-performance CPU power delivery in server and desktop motherboards.
For engineers reviewing the ISL6336CRZ-T datasheet, ISL6336CRZ-T pinout, ISL6336CRZ-T application, or ISL6336CRZ-T equivalent, key selection considerations include VR11.1 compliance, 48-pin QFN package, PSI#-enabled light-load efficiency mode, programmable switching frequency up to 1 MHz, and integrated temperature-compensated current sensing for accurate load-line programming and OCP.
Technical Context
The ISL6336CRZ-T implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to achieve fast transient response without increasing output capacitance. Its dual-edge PWM architecture dynamically adjusts pulse edges across phases to minimize ripple and improve regulation stability under rapid load steps.
It supports both resistor-based and DCR-based current sensing with integrated temperature compensation (TCOMP pin), enabling precise channel-current balancing, average overcurrent protection, and ±0.5% system accuracy over 0°C to +70°C. The PSI# input triggers phase dropping to 1- or 2-phase operation with diode emulation-exclusive to ISL6336 (not ISL6336A)-to reduce switching/core losses at light load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–6-phase interleaved buck operation; enables scalable power delivery from low-power to high-current CPU loads. |
| VR Compliance | Fully compliant with Intel VR11.1 specification, including VID code mapping, PSI# behavior, and droop requirements. |
| System Accuracy | ±0.5% over life, load, line, and temperature (0°C to +70°C) for VID = 1.0–1.6V; ensures tight core voltage regulation under dynamic conditions. |
| Switching Frequency | Adjustable up to 1 MHz per phase via FS pin resistor; higher frequency allows smaller magnetics and faster transient response. |
| Current Sensing | Supports precision DCR or discrete resistor sensing with integrated temperature compensation; enables accurate load-line programming and per-phase OCP. |
| IMON Output | Current-source output proportional to total regulator current; clamped at 1.11 V for overcurrent shutdown-provides real-time current telemetry. |
| Package | 48-lead 7×7 mm QFN (JEDEC MO-220), exposed thermal pad grounded; optimized for high-density motherboard layouts with low θJA (29°C/W). |
Pinout & Package
ISL6336CRZ-T is housed in a RoHS-compliant, Pb-free 48-lead QFN package (7 mm × 7 mm, 0.5 mm pitch) with an exposed thermal pad tied to GND. The package supports reflow per IPC/JEDEC J-STD-020 and provides low thermal resistance (θJC = 2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core supply input | +5 V ±5% main power rail; POR threshold 4.4 V rising; requires local R/C decoupling for noise immunity. |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | Both require 0.85 V min to activate; falling below 0.75 V clears faults and primes soft-start-enables coordinated power sequencing with driver ICs and VTT rail. |
| PSI# | Power State Indicator input | Active-low signal initiating proprietary phase dropping and diode emulation; enables 1-/2-phase light-load mode with reduced switching loss. |
| IMON | Average current monitor output | Current-source output (scaled sum of all phase currents); 1.11 V clamp triggers OCP-used for system-level current telemetry and protection. |
| ISEN[1–6]+/− | Differential current sense inputs | Per-phase inputs for DCR or resistor sensing; inactive channels left open; supports channel-current balancing and individual phase OCP. |
| PWM[1–6] | Phase gate-drive outputs | Open-drain PWM signals driving external MOSFET drivers; phase count configured by tying PWM3–PWM6 to VCC (e.g., PWM6 = VCC → 5-phase). |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 compliance | Guarantees interoperability with VR11.1-compliant microprocessors, including correct VID decoding, PSI# timing, and droop slope behavior. |
| Active Pulse Positioning (APP) | Dual-edge PWM modulation that dynamically shifts leading/trailing edges across phases to suppress ripple and accelerate transient recovery without added capacitance. |
| Proprietary phase dropping with diode emulation | Reduces active phases to 1 or 2 under PSI# assertion while emulating diode conduction-lowers core and switching losses at light load without changing layout. |
| Differential remote voltage sensing (VDIFF/VSEN/RGND) | Eliminates ground offset errors between controller and CPU; improves regulation accuracy and OVP/UVLO trip point consistency in high-noise board environments. |
| Programmable temperature compensation (TCOMP) | Adjusts current-sense gain and OCP threshold based on TM pin voltage to counteract DCR drift-maintains accuracy across 0°C to +70°C ambient range. |
Applications
| Server CPU Voltage Regulator | Desktop Core Power Delivery |
|---|---|
|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring sub-1% voltage tolerance under 100 A load steps. IC Role / Device Role / Timing Role: Primary 6-phase PWM controller managing core rail (VDD) with VR11.1 VID interface, droop control, and IMON telemetry. Use Value: APP modulation and phase dropping ensure <50 µs transient response with ≤15 mV undershoot; reduces required bulk capacitance by 35% vs. single-phase design. |
Use Scenario: Mainstream desktop platforms with Intel 12th–14th Gen CPUs demanding efficient light-load operation and robust thermal management. IC Role / Device Role / Timing Role: Core voltage controller coordinating with ISL6620 drivers, using PSI# to drop to 2-phase + diode emulation during idle/sleep states. Use Value: Achieves >90% efficiency at 5 A load via phase dropping and diode emulation-reducing VR thermal rise by 12°C versus fixed 6-phase operation. |
| Workstation GPU Core Supply | High-Performance Computing (HPC) Node Regulator |
|
Use Scenario: Dual-GPU workstations where PCIe slot power limits demand tightly coupled, low-ripple core rails for NVIDIA RTX or AMD Radeon Pro GPUs. IC Role / Device Role / Timing Role: 5-phase controller (PWM6 left open) with DCR sensing and coupled inductors, synchronized via APA pin for inter-phase alignment. Use Value: Interleaved ripple cancellation lowers output voltage ripple to <5 mVpp, eliminating need for additional ceramic capacitors near GPU die. |
Use Scenario: Dense HPC blade servers with strict airflow and thermal constraints requiring high-efficiency, thermally aware power delivery. IC Role / Device Role / Timing Role: Core regulator using TM/TCOMP loop to scale OCP threshold and droop slope with VR temperature-prevents false OCP during sustained turbo boost. Use Value: Integrated thermal compensation maintains ±0.5% accuracy across full 0°C–70°C operating range, avoiding derating or manual calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6336ACRZ-T | Same pinout and feature set, but supports -40°C to +85°C industrial temp range and uses simplified PSI# logic (no diode emulation); lacks ISL6336's 3-level PWM in PSI# mode. | Required for extended-temperature systems (e.g., industrial PCs, edge servers); not suitable where diode emulation is needed for maximum light-load efficiency. | Select ISL6336ACRZ-T only when wider temperature range is mandatory and diode emulation is unnecessary. |
| RT8803AZSP | 6-phase VR11.1 controller with integrated MOSFET drivers; no IMON pin; uses different PSI# implementation and lacks TCOMP pin for thermal compensation. | Targeted at cost-sensitive consumer boards; eliminates need for external drivers but sacrifices current telemetry and temperature-adaptive OCP. | Choose RT8803AZSP for simplified BOM and space-constrained designs where IMON and TCOMP are non-critical. |
Compared with ISL6336CRZ-T, ISL6336ACRZ-T extends temperature range at the expense of diode emulation capability, while RT8803AZSP integrates drivers but removes critical analog monitoring features-making ISL6336CRZ-T optimal for performance-critical, thermally managed server/desktop VRMs requiring full telemetry and adaptive protection.
Availability
ISL6336CRZ-T is available at Aetrix Electronics and suitable for server motherboard development, high-end desktop platform validation, and enterprise workstation power supply design requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL6336CRZ-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 support for its high-performance analog and power management portfolio, including VR controllers used in datacenter and computing infrastructure.
The ISL6336CRZ-T belongs to Renesas' VR11.x multiphase controller family, designed specifically for Intel-compatible CPU core voltage regulation with emphasis on transient response, light-load efficiency, and system-level telemetry integration.
FAQ
What is the operating temperature range for the ISL6336CRZ-T?
The ISL6336CRZ-T is rated for 0°C to +70°C ambient operation, as specified in the FN6504 datasheet. This commercial-grade temperature range aligns with standard desktop and entry-server motherboard thermal profiles. For extended-temperature applications, the ISL6336ACRZ-T variant supports -40°C to +85°C, but lacks the diode emulation feature present in the ISL6336CRZ-T.
Does the ISL6336CRZ-T support diode emulation, and how is it enabled?
Yes, the ISL6336CRZ-T supports diode emulation exclusively during PSI#-asserted light-load operation. When PSI# is pulled low, the controller drops to 1- or 2-phase mode and generates a 3-level PWM pattern on active phases-enabling synchronous rectifier turn-off to emulate diode conduction. This feature reduces switching and core losses and is confirmed in the "Controller and Driver Recommendations" section of the FN6504 datasheet.
How does the ISL6336CRZ-T implement temperature compensation for current sensing?
The ISL6336CRZ-T uses the TCOMP pin to accept a scaled voltage from an NTC thermistor network on the TM pin. This voltage adjusts the gain of the current-sense amplifiers and the overcurrent protection threshold to compensate for DCR drift with temperature. The integrated function maintains ±0.5% system accuracy across 0°C to +70°C without external calibration-detailed in the "Electrical Specifications" and "Functional Pin Description" sections of FN6504.
What is the purpose of the IMON pin on the ISL6336CRZ-T, and how is it used?
The IMON pin on the ISL6336CRZ-T provides a current-source output proportional to the sum of all phase currents. A resistor-to-ground converts this to a voltage (clamped at 1.11 V), enabling real-time current telemetry and overcurrent shutdown. Per FN6504, IMON is used for system-level power monitoring and must be terminated with a resistor and ≥300 µs RC time constant capacitor-critical for accurate load reporting and fault detection.
Can the ISL6336CRZ-T be configured for fewer than 6 phases, and how is phase count selected?
Yes, the ISL6336CRZ-T supports 1–6-phase operation via hardware configuration. Tie PWM3 to VCC for 2-phase, PWM4 for 3-phase, PWM5 for 4-phase, and PWM6 for 5-phase. Leaving all PWM3–PWM6 floating configures full 6-phase operation. Inactive ISEN+/- pins must remain unconnected. This configuration method is explicitly defined in the "Functional Pin Description" section of the FN6504 datasheet.
ISL6336CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-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:
- 48-QFN (7x7)
ISL6336CRZ-T FAQ
1.How can I place an order for ISL6336CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6336CRZ-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 ISL6336CRZ-T reliable?
The price and inventory of ISL6336CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6336CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6336CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6336CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6336CRZ-T?
ISL6336CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6336CRZ-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 ISL6336CRZ-T?
For technical support, including ISL6336CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6336CRZ-T requirements.
6.How does Aetrix verify that ISL6336CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6336CRZ-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 ISL6336CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6336CRZ-T?
All ISL6336CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6336CRZ-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 ISL6336CRZ-T part is unused and in its original packaging.
Return procedure for ISL6336CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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