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Renesas ISL6566CR
- Part No.:
- ISL6566CR
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6566CR.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,924
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Product details
Overview
ISL6566CR from Intersil is a three-phase buck PWM controller with integrated high- and low-side MOSFET drivers, designed for precision core voltage regulation in Intel VRM9/VRM10 and AMD Hammer microprocessor power delivery systems. It supports 1–3-phase operation, delivers ±0.5% system accuracy over temperature, uses dual DCR/rDS(ON) current sensing for droop control and channel balancing, and operates up to 1.5 MHz per phase.
For engineers reviewing the ISL6566CR datasheet, ISL6566CR pinout, ISL6566CR application, or ISL6566CR equivalent, key selection criteria include its integrated gate drivers (5–12 V bias), programmable VID decoding (6-bit DAC), differential remote sensing (VDIFF), lossless current sampling architecture, and multi-tiered OVP/UVP/OCP protection - all critical for high-current CPU/GPU VRMs.
Technical Context
The ISL6566CR implements interleaved three-phase PWM control using adaptive non-overlap timing and internal sawtooth oscillator synchronization. Its error amplifier features 96 dB DC gain and 20 MHz GBW, driving COMP with 8 V/µs slew rate to support fast transient response in microprocessor loads.
Current sensing combines two independent paths: DCR-based ISUM/IREF/ICOMP loop for load-line droop and overcurrent thresholding, and rDS(ON)-based ISEN1–ISEN3 inputs for real-time per-channel current sampling and dynamic pulse-width correction - enabling precise channel-current balance across all active phases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to 70°C ambient - defines industrial-grade thermal envelope for stable VRM operation without derating |
| Phase Support | 1-, 2-, or 3-phase selectable via PVCC2/PVCC3 connection - enables flexible BOM reuse across power tiers |
| System Accuracy | ±0.5% over temp (VID = 1.0–1.85 V) - ensures tight core voltage tolerance under full thermal and load variation |
| Switching Frequency | Up to 1.5 MHz per phase - allows smaller magnetics and faster transient response in space-constrained CPU VRMs |
| Gate Drive Bias | 5 V to 12 V (PVCC) - supports optimized RDS(ON) trade-off for upper/lower MOSFETs in high-efficiency designs |
| VID Compatibility | Intel VRM9/VRM10 and AMD Hammer DAC codes - enables single-controller support across x86 and hybrid processor platforms |
| OCP Threshold | 100 µA at OCSET pin - sets overcurrent trip point via single external resistor for scalable fault protection |
Pinout & Package
ISL6566CR is housed in a 40-lead 6×6 mm QFN package (PKG DWG # L40.6x6) with exposed thermal pad. Pin functions are validated per FN9178 Rev 4.00 datasheet, top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | DAC input logic | Encode microprocessor core voltage setpoint; VID12.5 + VRM10 select VRM9/VRM10/AMD Hammer DAC mapping |
| UGATE1–3, LGATE1–3 | MOSFET gate drivers | Direct drive for upper/lower synchronous FETs; integrated shoot-through protection prevents cross-conduction |
| ISEN1–3 | rDS(ON) current sense input | Samples lower-FET conduction current for per-phase balancing; requires external RISEN resistor |
| ISUM, IREF, ICOMP | DCR current sense interface | Forms droop voltage (IREF–ICOMP) added to VDIFF; enables load-line programming and OCP |
| VDIFF, FB, COMP | Error amplifier signal chain | VDIFF = remote-sense output + droop voltage; FB = inverting input; COMP = amplifier output for loop compensation |
| ENLL | Enable threshold input | 0.66 V rising-edge enable with 100 mV hysteresis - provides clean power-up sequencing control |
| PGOOD | Power-good status output | Open-drain signal pulled low during soft-start, OVP, UVP, or OCP - used for system reset coordination |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-phase gate drivers | Eliminates need for 6 discrete driver ICs; reduces PCB area and component count in high-density VRMs |
| Dual current sensing (DCR + rDS(ON)) | Enables simultaneous accurate load-line droop control and per-channel current matching without additional ICs |
| Differential remote voltage sensing | Compensates for IR drop between VRM output and CPU VDD/VSS pins - maintains true core voltage accuracy |
| Programmable reference offset (OFS) | Supports positive/negative DC offset via single external resistor - enables fine-tuning of VID-set voltage |
| Dynamic VID technology | Allows real-time core voltage adjustment during processor state transitions - critical for power-state efficiency |
| Multi-tiered overvoltage protection | Clamps output by turning on lower FETs when VSEN exceeds VID+150 mV - protects CPU from catastrophic overvoltage |
Applications
| Server CPU Power Delivery | Workstation GPU VRM |
|---|---|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring <30 A per phase with tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary three-phase PWM controller managing gate timing, current sharing, droop, and protection for CPU core rail. Use Value: ±0.5% system accuracy and 1.5 MHz switching enable stable operation at 1.0–1.3 V under 100+ A dynamic loads with minimal output capacitance. |
Use Scenario: Dual-GPU or high-TDP workstation graphics cards needing balanced multi-phase power with thermal derating headroom. IC Role / Device Role / Timing Role: Synchronized 3-phase controller coordinating parallel power stages across GPU memory and core rails. Use Value: rDS(ON) current balancing ensures equal thermal loading across MOSFETs, extending reliability in sustained compute workloads. |
| AMD Platform Reference Designs | Intel VRM10 Compliant Motherboards |
Use Scenario: Socket AM4/AM5 motherboards implementing AMD Hammer VID protocol for Ryzen Threadripper CPUs. IC Role / Device Role / Timing Role: VID decoder and PWM generator compliant with AMD's 5-bit VID code table and dynamic voltage scaling requirements. Use Value: Direct support for AMD-specific VID codes (e.g., 0.800–1.550 V range) eliminates firmware translation layer and simplifies BIOS integration. |
Use Scenario: Desktop and mobile motherboards targeting Intel VRM10.0 specification with 6-bit VID and tighter accuracy mandates. IC Role / Device Role / Timing Role: Precision voltage regulator controller meeting VRM10.0 ±0.5% system accuracy and 200 ns OVP response time. Use Value: Integrated OVP clamping and 100 µA OCSET threshold ensure compliance with Intel's safety-critical VRM10 fault-response requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports up to 4 phases; includes digital PMBus interface and telemetry; requires external gate drivers | Used in digitally managed server VRMs where telemetry and remote configuration are required | Choose IR35201 when digital control, fault logging, or multi-rail coordination is needed - not a pin-compatible replacement |
| TPS53679RSLR | Single-chip 3-phase controller with integrated drivers; supports VRM10.1/IMVP8; higher max frequency (2 MHz) | Targeted at modern Intel 10th–13th gen platforms with enhanced transient response demands | Choose TPS53679 for newer IMVP8/VRM10.1 designs requiring faster loop bandwidth and improved light-load efficiency |
Compared with ISL6566CR, IR35201 offers digital configurability but adds complexity and external driver cost, while TPS53679 delivers higher frequency and newer spec compliance but lacks AMD Hammer VID support - ISL6566CR remains optimal for cost-sensitive, analog-controlled VRM9/VRM10/AMD platforms.
Availability
ISL6566CR is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU VRMs, AMD platform reference designs, and Intel VRM10-compliant motherboards requiring stable component supply across long production lifecycles.
Supply support for ISL6566CR 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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, industrial, and communications markets.
The ISL6566CR belongs to Intersil's VRM controller product line, engineered specifically for high-efficiency, multi-phase core voltage regulation in advanced microprocessor platforms - emphasizing analog precision, integrated gate drive, and robust protection.
FAQ
What is the maximum operating temperature for the ISL6566CR?
The ISL6566CR is rated for an ambient operating temperature range of 0°C to 70°C, as specified in the ordering information and absolute maximum ratings section of the FN9178 datasheet. This industrial-grade rating ensures reliable performance in server and desktop motherboard environments without requiring forced airflow or thermal derating below 70°C ambient.
Does the ISL6566CR support AMD Hammer microprocessors?
Yes, the ISL6566CR explicitly supports AMD Hammer microprocessors through its configurable VID decoding. When VRM10 is grounded and VID12.5 is also grounded, the ISL6566CR activates AMD Hammer DAC mode, interpreting VID0–VID4 as a 5-bit code for voltages from 0.800 V to 1.550 V - fully compliant with AMD's published VID tables.
How does the ISL6566CR achieve channel-current balance?
The ISL6566CR achieves channel-current balance using rDS(ON) current sensing on ISEN1–ISEN3 pins. During each lower-FET conduction interval, it samples the voltage across an external RISEN resistor tied to the PHASE node, generating a current proportional to channel load. The controller compares each sampled current to the average (IAVG) and dynamically adjusts PWM duty cycle per phase to force error toward zero.
What package type is used for the ISL6566CR?
The ISL6566CR uses a 40-lead 6×6 mm QFN package (drawing number L40.6x6) with an exposed thermal pad. This RoHS-compliant, lead-free package provides low thermal resistance (θJA = 32°C/W, θJC = 3.5°C/W) and supports reflow soldering per JEDEC J-STD-020 moisture sensitivity level requirements.
Can the ISL6566CR be configured for single-phase operation?
Yes, the ISL6566CR supports 1-, 2-, or 3-phase operation via PVCC pin configuration. For single-phase operation, both PVCC2 and PVCC3 must be left unconnected or grounded. This disables channels 2 and 3, causing the controller to operate only on PHASE1, UGATE1, LGATE1, and associated sensing inputs - retaining full functionality with reduced channel count.
ISL6566CR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VRM9, VRM10, AMD Hammer Applications
- Voltage - Input:
- 3V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.8V ~ 1.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6566CR FAQ
1.How can I place an order for ISL6566CR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6566CR 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 ISL6566CR reliable?
The price and inventory of ISL6566CR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6566CR is usually 5 days.
3.What payment methods are accepted for ISL6566CR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6566CR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6566CR?
ISL6566CR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6566CR 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 ISL6566CR?
For technical support, including ISL6566CR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6566CR requirements.
6.How does Aetrix verify that ISL6566CR is sourced from the original manufacturer or authorized distributors?
All ISL6566CR 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 ISL6566CR meets industry standards.
7.What is the process for return or replacement of ISL6566CR?
All ISL6566CR units undergo pre-shipment inspection (PSI). If there is an issue with ISL6566CR, 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 ISL6566CR part is unused and in its original packaging.
Return procedure for ISL6566CR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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