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Renesas ISL6566CR-T
- Part No.:
- ISL6566CR-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6566CR-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,967
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Product details
Overview
ISL6566CR-T from Renesas (formerly 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. It supports 1–3-phase operation, delivers ±0.5% system accuracy over temperature, uses dual DCR/rDS(ON) current sensing for load-line droop and channel-current balance, and operates up to 1.5 MHz per phase in server and desktop CPU VRMs.
For engineers reviewing the ISL6566CR-T datasheet, ISL6566CR-T pinout, ISL6566CR-T application, or ISL6566CR-T equivalent, key selection considerations include its integrated gate drivers, programmable VID decoding (VRM9/VRM10/AMD), differential remote sensing, lossless DCR-based load-line programming, and multi-tiered OVP/UVP/OCP protection - all in a 40-lead 6×6 mm QFN package.
Technical Context
The ISL6566CR-T implements interleaved three-phase PWM control with adaptive non-overlap timing, using a sawtooth oscillator synchronized across phases. Its error amplifier features 96 dB DC gain and 20 MHz GBW, supporting stable compensation of high-bandwidth VRM loops.
Current sensing combines two independent methods: continuous inductor DCR sampling (via ISUM/IREF/ICOMP) for accurate load-line positioning and overcurrent protection, and per-phase rDS(ON) sampling (via ISEN1–ISEN3) for real-time channel-current balancing - both validated for simultaneous use in the same design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to +70°C ambient - suitable for commercial-grade motherboard and server VRM applications without extended thermal derating. |
| Switching Frequency | Up to 1.5 MHz per phase - enables smaller magnetics and faster transient response in high-density CPU power stages. |
| System Accuracy | ±0.5% over temperature (VID = 1.0V–1.85V) - ensures tight core voltage regulation under dynamic CPU load conditions. |
| Gate Drive Bias Range | 5 V to 12 V (PVCC) - supports optimal RDS(ON) utilization for both logic- and standard-level MOSFETs. |
| Overcurrent Threshold | 100 µA at OCSET pin - sets precise, resistor-programmable OCP trip point independent of temperature drift. |
| Droop Programming | Lossless DCR-based - eliminates sense-resistor power loss while enabling accurate load-line slope control for CPU VID compliance. |
| VID Compatibility | 6-bit DAC supporting Intel VRM9.0, VRM10.0, and AMD Hammer codes - enables single-controller support across multiple CPU generations. |
Pinout & Package
ISL6566CR-T is housed in a thermally enhanced 40-lead 6×6 mm QFN package (PKG DWG # L40.6x6) with exposed thermal pad, θJA = 32°C/W, θJC = 3.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | DAC input logic interface | Accept TTL-level signals to select output voltage per VRM9/VRM10/AMD tables; internal 40 µA pull-ups simplify host connection. |
| UGATE1–3, LGATE1–3 | Integrated MOSFET gate drivers | Drive upper/lower FET gates directly; UGATE includes adaptive shoot-through prevention and bootstrap charge management. |
| ISEN1–3 | rDS(ON) current sense inputs | Sample lower-FET conduction voltage to enable per-phase current balancing without external shunts. |
| ISUM, IREF, ICOMP | DCR current-sense summing network | Implement lossless inductor DCR sensing for droop and OCP; require external RC feedback for integrator function. |
| VSEN, RGND, VDIFF | Differential remote voltage sensing | Compensate for PCB IR drop between VRM and CPU; VDIFF outputs regulated voltage + droop offset for error amplifier. |
| ENLL | Enable/disable control | 0.66 V threshold with 100 mV hysteresis - allows clean sequencing with system power-good signals. |
| PGOOD | Power-good status output | Open-drain signal pulled low during UV/OV/fault; remains low until soft-start completes and regulation is stable. |
| FS | Frequency set input | Resistor-to-ground sets switching frequency (e.g., 100 kΩ → 250 kHz); supports up to 1.5 MHz via internal multiplier. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-phase gate drivers | Eliminates 6 external driver ICs; reduces BOM count, layout area, and propagation delay mismatch between phases. |
| Dual-method current sensing | DCR sensing for system-level droop/OCP + rDS(ON) sensing for per-phase current balance - no trade-off between accuracy and efficiency. |
| Dynamic VID technology | Supports real-time voltage scaling during CPU state transitions (C-states), minimizing idle power without firmware intervention. |
| Multi-tiered overvoltage protection | Clamps output by turning on lower FETs when VSEN exceeds VID+150 mV; prevents CPU damage during transient faults. |
| Selectable VRM standard mode | Configurable via VRM10/VID12.5 pins - one hardware design supports Intel VRM9, VRM10, and AMD Hammer CPUs. |
Applications
| Server CPU Power Delivery | Desktop VRM for AMD Hammer Processors |
|---|---|
Use Scenario: High-current, low-voltage core supply for dual-socket Xeon or Opteron platforms requiring >100 A total output with tight transient response. IC Role / Device Role / Timing Role: Three-phase PWM controller with integrated drivers, managing synchronous buck conversion, current sharing, and VID decoding. Use Value: Achieves <±0.5% regulation accuracy and <100 ns gate drive non-overlap, reducing thermal stress and improving power stage efficiency vs. discrete controller+driver solutions. |
Use Scenario: Motherboard VRM delivering 1.1–1.55 V to AMD Athlon 64/FX processors with dynamic VID scaling. IC Role / Device Role / Timing Role: VRM-compliant PWM controller implementing AMD Hammer VID code mapping and DCR-based load-line droop. Use Value: Enables single-design compatibility with AMD's 5-bit VID table while maintaining ±0.8% accuracy in 0.8–1.0 V range - critical for CPU stability at low voltages. |
| Intel VRM10.0 Compliant Notebook VRM | High-Density Embedded Computing Power |
Use Scenario: Compact 1.0–1.5 V core supply in mobile workstations using Intel Pentium M/Core Duo CPUs with VRM10.0 requirements. IC Role / Device Role / Timing Role: Programmable 6-bit DAC controller supporting VRM10.0 VID codes, differential remote sensing, and thermal-compensated soft-start. Use Value: Delivers 1.5 MHz per-phase switching capability in 6×6 mm QFN - reduces output capacitor count by 40% vs. 500 kHz designs while meeting VRM10 transient specs. |
Use Scenario: Ruggedized embedded board powering ARM or x86 SoCs in industrial gateways where long-term component availability and thermal reliability are critical. IC Role / Device Role / Timing Role: Fixed-frequency, three-phase buck controller with Pb-free RoHS-compliant packaging and -40°C to +85°C qualified variants (IR grade). Use Value: Provides lifecycle continuity through Renesas' long-term supply program and supports thermal shutdown at 160°C - essential for fanless, sealed enclosures. |
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 |
|---|---|---|---|
| ISL6566IR-T | Same silicon, extended temperature range (-40°C to +85°C) and identical pinout/package. | Required for industrial or automotive-adjacent embedded systems operating outside 0–70°C commercial range. | Select ISL6566IR-T when ambient exceeds 70°C or storage conditions demand wider spec. |
| RT8803AZSP | Three-phase controller with integrated drivers but no DCR sensing; relies on external current-sense resistors for OCP and droop. | Lacks lossless DCR implementation - adds ~0.5 W per phase sense-resistor loss and requires extra PCB area. | Choose RT8803AZSP only if design already uses shunt-based current monitoring and prioritizes cost over efficiency. |
Compared with ISL6566CR-T, ISL6566IR-T offers identical functionality with extended thermal rating, while RT8803AZSP trades DCR-based efficiency for simpler current sensing - making ISL6566CR-T the optimal choice for high-efficiency, space-constrained VRMs requiring lossless droop and OCP.
Availability
ISL6566CR-T is available at Aetrix Electronics and suitable for server motherboard design, desktop VRM development, and embedded computing power systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6566CR-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 ICs including the ISL6566 family.
The ISL6566 product line was engineered specifically for high-efficiency, multi-phase CPU core voltage regulation in desktop, server, and workstation platforms compliant with Intel VRM9/VRM10 and AMD Hammer specifications.
FAQ
What is the maximum supported switching frequency per phase for the ISL6566CR-T?
The ISL6566CR-T supports up to 1.5 MHz per phase, enabled via internal frequency multiplication. The base oscillator frequency is set by an external resistor on the FS pin (e.g., 100 kΩ yields 250 kHz), and higher frequencies are achieved through internal scaling - allowing compact magnetics and fast transient response in high-performance VRMs.
Does the ISL6566CR-T support both Intel and AMD microprocessor voltage identification standards?
Yes, the ISL6566CR-T supports Intel VRM9.0, VRM10.0, and AMD Hammer VID standards via hardware-selectable configuration using the VRM10 and VID12.5 pins. This enables a single PCB design to serve multiple CPU platforms without firmware or hardware changes - verified in Tables 1–4 of the FN9178 datasheet.
How does the ISL6566CR-T implement lossless current sensing for load-line droop?
The ISL6566CR-T uses inductor DCR sensing via the ISUM, IREF, and ICOMP pins to generate a voltage proportional to load current without external shunt resistors. An external RC network between ISUM and ICOMP creates an integrator that produces the droop voltage - eliminating ~0.5 W of heat per phase compared to shunt-based solutions while maintaining ±1% droop accuracy.
What is the purpose of the ENLL pin on the ISL6566CR-T, and what voltage threshold triggers enable?
The ENLL pin is the controller enable input with a 0.66 V rising threshold and 100 mV hysteresis. When pulled above 0.66 V (e.g., by a system power-good signal), it initiates soft-start and enables PWM operation; below 0.56 V, it forces shutdown. An internal 1.0 µA pull-up to 5 V simplifies interface with open-drain sequencers.
Can the ISL6566CR-T operate in single-phase or dual-phase mode, and how is phase count configured?
Yes, the ISL6566CR-T supports 1-, 2-, or 3-phase operation. Phase count is determined by PVCC2 and PVCC3: leave both unconnected for 1-phase; ground or float PVCC3 only for 2-phase; connect all three PVCC pins for 3-phase. This hardware-configurable flexibility allows reuse across platform variants without changing firmware or layout.
ISL6566CR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL6566CR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6566CR-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 ISL6566CR-T reliable?
The price and inventory of ISL6566CR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6566CR-T is usually 5 days.
3.What payment methods are accepted for ISL6566CR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6566CR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6566CR-T?
ISL6566CR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6566CR-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 ISL6566CR-T?
For technical support, including ISL6566CR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6566CR-T requirements.
6.How does Aetrix verify that ISL6566CR-T is sourced from the original manufacturer or authorized distributors?
All ISL6566CR-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 ISL6566CR-T meets industry standards.
7.What is the process for return or replacement of ISL6566CR-T?
All ISL6566CR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6566CR-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 ISL6566CR-T part is unused and in its original packaging.
Return procedure for ISL6566CR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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