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Renesas ISL6566IR-T
- Part No.:
- ISL6566IR-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6566IR-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
ISL6566IR-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 systems. It supports 1/2/3-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 ISL6566IR-T datasheet, ISL6566IR-T pinout, ISL6566IR-T application, or ISL6566IR-T equivalent, key selection considerations include its -40°C to +85°C industrial temperature range, 40-pin 6×6 mm QFN package, integrated gate drivers with adaptive non-overlap timing, programmable VID DAC compatibility, and combined DCR + rDS(ON) current sensing architecture.
Technical Context
The ISL6566IR-T implements interleaved three-phase PWM control with automatic channel detection via PVCC2/PVCC3 pin states, enabling seamless reconfiguration between 1-, 2-, or 3-phase operation without external logic. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product, supporting stable compensation across wide load transients.
Current sensing combines lossless inductor DCR sampling (for load-line droop and overcurrent protection) with rDS(ON) sampling (for per-channel current balance), using dedicated ISEN1–3, ISUM, IREF, and ICOMP pins. Protection includes multi-tiered overvoltage clamping (via lower-FET turn-on), undervoltage lockout at 82% VID, and open-sense-line detection triggered by VDIFF + 1.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade motherboard and server VRM applications. |
| Phase Support | 1/2/3-phase selectable - determined by PVCC2/PVCC3 connection state; no external configuration required. |
| System Accuracy | ±0.5% (VID = 1.0–1.85 V) - ensures tight microprocessor core voltage tolerance under thermal stress. |
| Switching Frequency | Up to 1.5 MHz per phase - enables compact magnetics and high transient response in space-constrained designs. |
| Current Sensing | DCR + rDS(ON) dual method - DCR for accurate droop/OC protection; rDS(ON) for <5% channel-current imbalance. |
| Gate Drive Bias | 5 V to 12 V - configurable PVCC supply per phase allows optimization of FET switching losses and EMI. |
| VID Compatibility | Intel VRM9.0, VRM10.0, AMD Hammer - selected via VRM10/VID12.5 pins; supports dynamic VID updates. |
Pinout & Package
ISL6566IR-T is housed in a thermally enhanced 40-lead 6 mm × 6 mm QFN package (PKG DWG # L40.6x6) with exposed thermal pad. The package supports Pb-free (RoHS-compliant) assembly and has θJA = 32°C/W and θJC = 3.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | DAC input bits | Encode microprocessor core voltage setpoint per VRM9/VRM10/AMD Hammer tables; internally pulled up to 1.2 V. |
| UGATE1–3, LGATE1–3 | MOSFET gate drivers | Drive upper/lower FET gates per phase; include adaptive shoot-through prevention and 10 ns non-overlap timing. |
| ISEN1–3 | rDS(ON) current sense inputs | Sample lower-FET conduction current for per-phase current balancing; require external RISEN resistors. |
| ISUM, IREF, ICOMP | DCR current sense interface | Form summing node (ISUM), reference point (IREF), and output (ICOMP) for lossless inductor DCR droop generation. |
| VSEN / RGND | Remote voltage sense pair | Differential inputs to unity-gain amplifier; compensate PCB IR drop between VRM and CPU socket. |
| ENLL | Enable input | Logic-threshold enable (0.66 V rising); internal 1 µA pull-up to 5 V; disables all PWM and drivers when low. |
| PGOOD | Power-good indicator | Open-drain output asserted high only when output voltage is within ±5% UV/OV limits and soft-start complete. |
Key Features
| Feature | Design Value |
|---|---|
| Dual current sensing | Simultaneous DCR (droop/OC) and rDS(ON) (channel balance) sensing eliminates need for separate current-sense ICs or resistors. |
| Programmable VID DAC | 6-bit DAC with hardware-selectable VRM9/VRM10/AMD Hammer code mapping enables single design reuse across CPU platforms. |
| Differential remote sensing | Unity-gain VSEN/RGND amplifier with ±0.5% accuracy compensates for ground potential differences up to 100 mV. |
| Adjustable voltage offset | OFS pin supports ±15 mV to ±50 mV output offset via single external resistor - enables fine-tuning for margin testing or aging compensation. |
| Digital soft-start | Internally controlled monotonic startup with programmable ramp time - prevents inrush current and ensures reliable PGOOD assertion. |
Applications
| Server CPU Power Delivery | Workstation VRM Design |
|---|---|
Use Scenario: High-current, low-voltage core supply for dual-socket Xeon or EPYC processors requiring >100 A with <1% voltage deviation. IC Role / Device Role / Timing Role: Three-phase PWM controller with integrated drivers, managing phase interleaving, current sharing, and dynamic VID updates during frequency scaling. Use Value: Enables 3× ripple frequency reduction and 3× lower peak-to-peak inductor current vs. single-phase, cutting output capacitance by ~40% and improving thermal distribution. |
Use Scenario: Precision 1.0–1.3 V core rail for high-end Intel Core i9 or AMD Ryzen Threadripper CPUs in professional CAD/rendering workstations. IC Role / Device Role / Timing Role: Primary voltage regulator IC implementing VRM10.0 compliance, differential remote sensing, and thermal-compensated droop via NTC on ISUM. Use Value: Achieves ±0.5% system accuracy across -40°C to +85°C ambient, meeting strict processor AVS and adaptive voltage requirements. |
| Industrial Embedded Computing | Communications Baseband Power |
Use Scenario: Long-lifecycle power solution for ruggedized embedded controllers in factory automation, where extended temperature operation and supply continuity are critical. IC Role / Device Role / Timing Role: Industrial-grade VRM controller (ISL6566IR-T) providing robust overvoltage/undervoltage protection and open-sense-line fault detection. Use Value: -40°C to +85°C rating and RoHS-compliant Pb-free+anneal packaging ensure reliability in uncontrolled thermal environments without derating. |
Use Scenario: Multi-rail power management for FPGA-based baseband processing units in 4G/5G small cells, requiring fast transient response and phase shedding. IC Role / Device Role / Timing Role: Configurable 1/2/3-phase controller supporting dynamic phase activation/deactivation based on DSP/FPGA load profile. Use Value: Phase-count flexibility reduces idle power by 35% in low-load states while maintaining <10 µs transient recovery via high-bandwidth error amplifier. |
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 |
|---|---|---|---|
| ISL6566CR-T | 0°C to +70°C operating range; identical electrical specs and pinout. | Limited to commercial-temperature computing applications (e.g., desktop motherboards). | Select ISL6566CR-T only if ambient temperature remains below 70°C and industrial qualification is not required. |
| RT8803AZSP | 40-pin QFN, supports VRM10/AMD, but lacks rDS(ON) current sensing - relies solely on DCR for both droop and balance. | Higher channel-current imbalance (>8%) under light loads due to absence of dedicated rDS(ON) path. | Choose RT8803AZSP only when cost sensitivity outweighs precision current sharing requirements. |
Compared with ISL6566IR-T, ISL6566CR-T offers identical functionality at lower cost but fails to meet industrial thermal requirements, while RT8803AZSP sacrifices channel-current matching accuracy to reduce BOM count - making ISL6566IR-T the sole option delivering guaranteed <5% imbalance with full -40°C to +85°C support.
Availability
ISL6566IR-T is available at Aetrix Electronics and suitable for server CPU power delivery, industrial embedded computing, workstation VRM design, and communications baseband power applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6566IR-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 continuity for the ISL6566 family. Renesas is a global leader in microcontrollers, analog, and power management ICs.
The ISL6566 belongs to Renesas' high-performance digital multiphase controller product line, engineered specifically for next-generation microprocessor core voltage regulation with emphasis on accuracy, thermal resilience, and platform interoperability across Intel and AMD ecosystems.
FAQ
What is the operating temperature range of the ISL6566IR-T?
The ISL6566IR-T is rated for -40°C to +85°C ambient operation, qualifying it for industrial and server-grade applications where thermal margins exceed commercial-grade alternatives. This range is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the FN9178 datasheet, and distinguishes it from the 0°C to +70°C ISL6566CR-T variant. The ISL6566IR-T maintains ±0.5% system accuracy across this full range.
How does the ISL6566IR-T support multiple CPU voltage standards?
The ISL6566IR-T supports Intel VRM9.0, VRM10.0, and AMD Hammer VID protocols through hardware-selectable pin configuration: VRM10 pin high enables VRM10.0 mode; VRM10 low + VID12.5 high selects VRM9.0; VRM10 low + VID12.5 low selects AMD Hammer. All modes use the same VID0–VID4 inputs and deliver corresponding DAC output voltages per published tables in the datasheet. The ISL6566IR-T decodes these codes internally without firmware or external logic.
Does the ISL6566IR-T require external current-sense resistors?
No - the ISL6566IR-T implements lossless current sensing: DCR sensing uses the inductor's inherent resistance (no resistor needed), and rDS(ON) sensing leverages the lower MOSFET's on-resistance. External components are limited to RISEN (for rDS(ON) gain setting) and the DCR sense network (RC feedback between ISUM and ICOMP). This eliminates power loss and board area associated with shunt resistors, a key advantage confirmed in the Functional Pin Description and Electrical Specifications sections of the ISL6566IR-T datasheet.
What protection features are integrated into the ISL6566IR-T?
The ISL6566IR-T integrates overvoltage protection (OVP) that actively clamps output by turning on lower MOSFETs, undervoltage lockout (UVP) at 82% VID, cycle-by-cycle overcurrent protection set via OCSET resistor, open-sense-line detection (triggered at VDIFF + 1.0 V), and thermal shutdown at 160°C. These protections are hardware-based, fully autonomous, and documented in the Protection section of FN9178 - no external circuitry is required to enable any of them. The ISL6566IR-T asserts PGOOD only when all protections are inactive and voltage is in spec.
Can the ISL6566IR-T operate in single-phase mode?
Yes - the ISL6566IR-T automatically configures for 1-, 2-, or 3-phase operation based on PVCC2 and PVCC3 pin states: both grounded or floating enables single-phase; only PVCC3 grounded enables two-phase; all PVCC pins powered enables three-phase. This is implemented entirely in analog logic within the ISL6566IR-T and requires no register writes or firmware. The PWM timing adjusts accordingly - e.g., in single-phase mode, PWM2 and PWM3 are disabled and PWM1 runs at full frequency with no interleaving.
ISL6566IR-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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6566IR-T FAQ
1.How can I place an order for ISL6566IR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6566IR-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 ISL6566IR-T reliable?
The price and inventory of ISL6566IR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6566IR-T is usually 5 days.
3.What payment methods are accepted for ISL6566IR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6566IR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6566IR-T?
ISL6566IR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6566IR-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 ISL6566IR-T?
For technical support, including ISL6566IR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6566IR-T requirements.
6.How does Aetrix verify that ISL6566IR-T is sourced from the original manufacturer or authorized distributors?
All ISL6566IR-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 ISL6566IR-T meets industry standards.
7.What is the process for return or replacement of ISL6566IR-T?
All ISL6566IR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6566IR-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 ISL6566IR-T part is unused and in its original packaging.
Return procedure for ISL6566IR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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