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Renesas ISL6566IRZA
- Part No.:
- ISL6566IRZA
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6566IRZA.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
ISL6566IRZA 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 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 ISL6566IRZA datasheet, ISL6566IRZA pinout, ISL6566IRZA application, or ISL6566IRZA 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-tier overvoltage/overcurrent protection architecture.
Technical Context
The ISL6566IRZA implements interleaved three-phase PWM control using a shared sawtooth oscillator and adaptive non-overlap timing to prevent shoot-through. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product, enabling stable compensation across wide load transients.
Current sensing combines continuous inductor DCR sampling (for load-line droop and overcurrent protection) with cycle-by-cycle rDS(ON) sampling (for precise per-channel current balance). Channel count is dynamically configured via PVCC2/PVCC3 pin states, supporting 1-, 2-, or 3-phase operation without external reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | −40°C to +85°C - qualified for industrial-grade server and embedded computing applications |
| Supply Voltage (VCC) | +5 V ±5% - powers internal logic and error amplifier; requires local 1.0 µF ceramic decoupling |
| Gate Drive Bias (PVCC) | +5 V to +12 V - sets upper/lower MOSFET gate drive strength; configurable per channel |
| Max Switching Frequency | 1.5 MHz per phase - enables compact magnetics and reduced output capacitance in high-density VRMs |
| System Accuracy | ±0.5% (VID = 1.0–1.85 V) - ensures tight core voltage regulation under thermal and load variation |
| OCSET Trip Current | 100 µA ±7% - sets overcurrent threshold via external resistor; enables accurate, scalable current limiting |
| Droop Programming | Lossless DCR sensing - eliminates sense-resistor power loss while enabling precise load-line slope control |
Pinout & Package
ISL6566IRZA is housed in a 40-lead 6×6 mm QFN package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin assignment matches the ISL6566 QFN footprint defined in Package Drawing L40.6x6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | Digital voltage identification inputs | Decode 5-/6-bit DAC codes for VRM9, VRM10, or AMD Hammer core voltage settings |
| VSEN / RGND | Differential remote sense inputs | Enable Kelvin sensing at CPU VDD/VSS pins to compensate for PCB IR drop |
| ISEN1–ISEN3 | rDS(ON) current sense inputs | Sample lower-MOSFET conduction voltage for per-phase current balancing |
| UGATE1–3 / LGATE1–3 | Integrated gate drivers | Drive high-side and low-side MOSFETs directly; eliminate need for external drivers |
| ISUM / IREF / ICOMP | DCR current-sense interface | Support lossless inductor DCR sensing for load-line droop and overcurrent protection |
| ENLL | Enable input with 0.66 V threshold | Internally pulled up to 5 V; controls full controller startup and shutdown sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-phase gate drivers | Eliminates 6 external driver ICs and associated layout complexity; reduces BOM count and board area |
| Dual current sensing (DCR + rDS(ON)) | Enables simultaneous accurate load-line droop control and real-time per-phase current matching |
| Programmable VID standard selection | Single-pin (VRM10) and dual-pin (VID12.5) configuration supports Intel VRM9/VRM10 and AMD Hammer DAC tables |
| Differential remote voltage sensing | Compensates for ground potential differences between controller and CPU, improving regulation accuracy |
| Multi-tier overvoltage protection | Clamps output by turning on low-side MOSFETs during fast overvoltage events, protecting sensitive microprocessors |
Applications
| Server CPU Power Delivery | Workstation GPU Core Supply |
|---|---|
Use Scenario: Regulating 1.0–1.55 V core voltage for dual-socket Xeon or EPYC processors under dynamic 30–120 A loads. IC Role / Device Role / Timing Role: Three-phase PWM controller with integrated drivers, DCR-based droop, and VID decoding for VRM10 compliance. Use Value: Achieves ±0.5% voltage accuracy across −40°C to +85°C while enabling compact 6-layer VRM layout with minimal external components. | Use Scenario: Delivering tightly regulated 0.8–1.2 V to high-end discrete GPUs with rapid load transients exceeding 200 A/µs. IC Role / Device Role / Timing Role: Synchronizes three interleaved buck phases with adaptive non-overlap timing and rDS(ON)-based current balancing. Use Value: Reduces output ripple amplitude by ~67% vs. single-phase design and lowers RMS input capacitor current by 50%, cutting input bulk cap cost and size. |
| Industrial Embedded MPU Supply | Communications Baseband Processor |
Use Scenario: Powering ARM-based SoCs in ruggedized networking equipment requiring −40°C to +85°C operation and long-term supply continuity. IC Role / Device Role / Timing Role: Configurable 1–3-phase controller with Pb-free QFN package, thermal shutdown (160°C), and open-sense-line protection. Use Value: Ensures reliable startup and fault recovery in unattended deployments; RoHS-compliant packaging meets industrial environmental requirements. | Use Scenario: Supplying 1.1–1.35 V to multi-core baseband processors in 5G small-cell radios with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Implements 1.5 MHz per-phase switching with digital soft-start and PGOOD monitoring for system-level power sequencing. Use Value: Enables use of smaller 0.47 µH inductors and low-ESR polymer capacitors, reducing solution height and improving transient response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6566CRZ | 0°C to +70°C operating range; identical pinout, functionality, and electrical specs | Restricted to commercial-temperature environments (e.g., desktop PCs, non-ruggedized systems) | Select ISL6566CRZ only when ambient temperature remains within 0–70°C and industrial qualification is not required. |
| RT8803AZSP | Supports up to 4 phases; includes integrated telemetry ADC and SMBus interface; no native AMD Hammer VID support | Targeted at modern VR13/VR14 platforms with digital PMBus communication and telemetry needs | Choose RT8803AZSP when digital interface, higher phase count, or VR13+ compliance is mandatory - not a drop-in replacement. |
Compared with ISL6566CRZ and RT8803AZSP, the ISL6566IRZA uniquely combines industrial temperature range (−40°C to +85°C), native AMD Hammer VID decoding, and dual DCR/rDS(ON) current sensing in a single 40-pin QFN - making it optimal for legacy server, workstation, and industrial MPU power where robust analog control and broad VID compatibility are critical.
Availability
ISL6566IRZA is available at Aetrix Electronics and suitable for server CPU power delivery, industrial embedded MPU supplies, communications baseband processor regulation, and workstation GPU core supply requiring stable component supply across extended temperature ranges.
Supply support for ISL6566IRZA 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 ISL6566 product family. Renesas is a global semiconductor leader focused on microcontrollers, analog, power, and connectivity solutions.
The ISL6566IRZA belongs to Renesas' high-performance analog power management portfolio, engineered specifically for precision multi-phase VRM applications in x86 and AMD-based computing platforms requiring robust analog control, thermal resilience, and backward-compatible VID decoding.
FAQ
What is the operating temperature range of the ISL6566IRZA?
The ISL6566IRZA is rated for −40°C to +85°C ambient operation, qualifying it for industrial and server-grade applications where thermal stability is critical. This range exceeds the 0°C to +70°C specification of the ISL6566CRZ variant and is validated per the Absolute Maximum Ratings and Recommended Operating Conditions in FN9178 Rev 4.00. The ISL6566IRZA's thermal shutdown activates at 160°C junction temperature, with recovery at 100°C.
Does the ISL6566IRZA support AMD Hammer microprocessors?
Yes, the ISL6566IRZA natively supports AMD Hammer VID codes through hardware-selectable DAC configuration. When VRM10 is grounded and VID12.5 is also grounded, the ISL6566IRZA decodes the 5-bit VID inputs (VID4–VID0) per the AMD Hammer table (Table 2, FN9178 p.12), enabling output voltages from 0.800 V to 1.550 V. This capability is identical across all ISL6566 variants, including the ISL6566IRZA.
How does the ISL6566IRZA implement current sensing for load-line droop?
The ISL6566IRZA uses lossless inductor DCR current sensing for load-line droop via the ISUM, IREF, and ICOMP pins. A resistor network connects each phase node to ISUM and IREF to ground (≈VOUT), forming a summing point. An R-C feedback loop from ISUM to ICOMP generates a voltage proportional to the DCR voltage drop - this "droop voltage" is added to the remote-sense amplifier output (VDIFF) to achieve precise voltage positioning. This method avoids power loss and tolerance drift associated with discrete sense resistors.
Can the ISL6566IRZA operate in single-phase mode?
Yes, the ISL6566IRZA supports 1-, 2-, or 3-phase operation via PVCC pin configuration. For single-phase operation, both PVCC2 and PVCC3 must be left unconnected or tied to ground. This disables channels 2 and 3, causing the ISL6566IRZA to generate only one PWM signal (PWM1) with full duty-cycle capability up to 66.6%. All current sensing, protection, and VID functions remain fully active for the enabled channel.
What package type and lead finish does the ISL6566IRZA use?
The ISL6566IRZA uses a 40-lead 6×6 mm QFN package (Package Drawing L40.6x6) with an exposed thermal pad. It features Pb-free plus anneal construction: 100% matte tin plate termination finish, RoHS-compliant molding compound and die attach, and MSL3 rating compatible with both SnPb and Pb-free reflow profiles. This matches the ISL6566IRZA-T tape-and-reel variant and differs from the non-Pb-free ISL6566IR.
ISL6566IRZA 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6566IRZA FAQ
1.How can I place an order for ISL6566IRZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6566IRZA 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 ISL6566IRZA reliable?
The price and inventory of ISL6566IRZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6566IRZA is usually 5 days.
3.What payment methods are accepted for ISL6566IRZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6566IRZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6566IRZA?
ISL6566IRZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6566IRZA 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 ISL6566IRZA?
For technical support, including ISL6566IRZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6566IRZA requirements.
6.How does Aetrix verify that ISL6566IRZA is sourced from the original manufacturer or authorized distributors?
All ISL6566IRZA 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 ISL6566IRZA meets industry standards.
7.What is the process for return or replacement of ISL6566IRZA?
All ISL6566IRZA units undergo pre-shipment inspection (PSI). If there is an issue with ISL6566IRZA, 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 ISL6566IRZA part is unused and in its original packaging.
Return procedure for ISL6566IRZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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