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Renesas ISL6568IRZA
- Part No.:
- ISL6568IRZA
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6568IRZA.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
ISL6568IRZA from Renesas (formerly Intersil) is a two-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 ±0.5% system accuracy over temperature, DCR + rDS(ON) dual-current sensing, and programmable 225–275 kHz switching frequency per phase.
For engineers reviewing the ISL6568IRZA datasheet, ISL6568IRZA pinout, ISL6568IRZA application, or ISL6568IRZA equivalent, this page delivers verified technical context on multi-phase droop control, remote differential sensing, VID code compatibility, gate drive bias range (5–12 V), and thermal shutdown at +160°C - all critical for server CPU VRM design validation and BOM optimization.
Technical Context
The ISL6568IRZA implements interleaved two-phase PWM control using an internal sawtooth oscillator synchronized across channels, with adaptive non-overlap timing (10 ns UGATE/LGATE turn-on delay) to prevent shoot-through. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product for stable loop compensation in high-bandwidth VRM designs.
It combines lossless DCR current sensing (for load-line droop and overcurrent protection) with rDS(ON) sampling (for per-channel current balancing), enabling accurate channel-current matching without external sense resistors. VID decoding supports three DAC modes - VRM9, VRM10, and AMD Hammer - selected via the VID12.5 pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +85°C - qualified for industrial-grade CPU power stages in servers and workstations. |
| Switching Frequency | 225–275 kHz per phase - set by external FS-to-GND resistor; enables optimized trade-off between efficiency and EMI filtering size. |
| System Accuracy | ±0.5% over temp (VID = 1.0–1.85 V) - ensures tight core voltage tolerance under dynamic CPU load transients. |
| Gate Drive Bias Range | 5 V to 12 V on PVCC - supports logic-level and standard-level MOSFETs with configurable drive strength. |
| OCSET Trip Current | 100 µA ±7% - sets overcurrent threshold via single external resistor; enables precise, scalable fault protection. |
| Droop Programming | DCR-based load-line positioning - eliminates need for external op-amps or discrete droop networks. |
| Thermal Shutdown | +160°C activation / +100°C recovery - provides robust thermal margin for sustained high-current operation. |
Pinout & Package
ISL6568IRZA is housed in a 32-lead, 5 mm × 5 mm, 0.5 mm pitch QFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin count and layout match the ISL6568 family's standardized footprint for drop-in compatibility across temperature grades.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5 V ±5% supply for internal logic and error amplifier; requires local 1 µF ceramic decoupling. |
| PVCC | Driver power supply | +5 V to +12 V gate drive rail; determines MOSFET switching speed and RDS(ON) utilization. |
| UGATE1/UGATE2 | Upper gate driver outputs | Drive high-side N-channel MOSFET gates; feature adaptive non-overlap to prevent shoot-through. |
| LGATE1/LGATE2 | Lower gate driver outputs | Drive synchronous rectifier (low-side) MOSFET gates; sink/source resistance ≤1.35 Ω ensures fast turn-off. |
| VSEN/RGND | Differential remote sense inputs | Enable Kelvin sensing at CPU VRM output; compensate for PCB IR drop between regulator and load. |
| ISEN1/ISEN2 | rDS(ON) current sense inputs | Sample lower-MOSFET conduction voltage to balance phase currents without shunt resistors. |
| OCSET | Overcurrent threshold reference | 100 µA current sink; sets per-phase OCP level with single external resistor (e.g., 10 kΩ = 1 V trip). |
| VID0–VID4, VID12.5 | Digital voltage ID inputs | Decode 5-bit AMD Hammer or 6-bit VRM9/VRM10 codes; VID12.5 selects DAC mode via resistor tie. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-phase PWM + drivers | Reduces component count by eliminating separate driver ICs; cuts PCB area and layout complexity in VRM designs. |
| Dual-method current sensing | DCR sensing for droop/overcurrent + rDS(ON) sensing for channel balance - achieves <±3% inter-phase current mismatch. |
| Differential remote voltage sensing | Compensates for ground potential differences up to ±1 V; maintains regulation accuracy despite high-current PCB traces. |
| Programmable reference offset | OFS pin supports ±150 mV adjustable offset via external resistor to GND or VCC - enables fine-tuning of load-line slope. |
| Multi-tier overvoltage protection | Clamps output by turning on lower MOSFETs during OVP events; includes open-sense-line detection to prevent false trips. |
Applications
| Server CPU Power Delivery | Workstation VRM Design |
|---|---|
|
Use Scenario: Regulating core voltage for dual-socket Xeon or EPYC processors with dynamic load steps up to 300 A/µs. IC Role / Device Role / Timing Role: Two-phase PWM controller managing gate timing, current sharing, and droop response across parallel buck stages. Use Value: Enables stable 0.8–1.55 V output with ±0.5% accuracy and sub-100 ns gate timing control - critical for meeting Intel VRM10 spec compliance. |
Use Scenario: High-efficiency 12 V input → 1.2 V output conversion for multi-core AMD Ryzen Threadripper platforms. IC Role / Device Role / Timing Role: VID-decoding controller supporting AMD Hammer DAC codes and real-time voltage adjustment during P-state transitions. Use Value: Delivers seamless VID-on-the-fly updates with digital soft-start and differential sensing - eliminates brownouts during frequency scaling. |
| Industrial Embedded Computing | High-Density Rack-Mount Systems |
|
Use Scenario: Powering ARM-based SoCs or FPGAs in extended-temperature edge servers operating from –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade PWM controller providing thermal shutdown at +160°C and robust overcurrent/undervoltage fault handling. Use Value: Ensures continuous operation under thermal stress with validated reliability across full industrial temperature range. |
Use Scenario: Compact, high-density 2U/1U server power modules where board space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Space-optimized QFN-packaged controller enabling two-phase interleaving to reduce input/output ripple and capacitor count. Use Value: Cuts total output capacitance by ~40% vs. single-phase design while maintaining <10 mV p-p ripple - lowers BOM cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-phase VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6566CRZ | Single-phase only; same VID support and DCR sensing but lacks second phase driver and PHASE2/BOOT2 pins. | Suitable for lower-current CPUs (<100 A) or cost-sensitive single-rail designs; not interchangeable without PCB revision. | Select ISL6566CRZ only when phase count reduction is acceptable and thermal budget allows higher per-phase current. |
| RT8803AZSP | Supports up to 4 phases; includes integrated MOSFET drivers and VRM10/AMD compatibility but uses different pinout and OCSET implementation. | Targeted at higher-current, future-proofed platforms requiring scalability beyond two phases; no pin compatibility with ISL6568IRZA. | Choose RT8803AZSP for new 4-phase designs or when needing enhanced telemetry (e.g., I²C reporting), not as drop-in replacement. |
Compared with ISL6568IRZA, ISL6566CRZ reduces integration depth (single-phase only) and requires redesign for multi-phase use, while RT8803AZSP increases phase flexibility but mandates full layout rework - making ISL6568IRZA optimal for validated two-phase VRM implementations requiring industrial temperature range and proven reliability.
Availability
ISL6568IRZA is available at Aetrix Electronics and suitable for server CPU power delivery, workstation VRM design, and industrial embedded computing requiring stable component supply, long-lifecycle support, and guaranteed Pb-free compliance.
Supply support for ISL6568IRZA 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 legacy Intersil power management ICs including the ISL6568 family.
The ISL6568 product line was engineered specifically for high-accuracy, multi-phase CPU core voltage regulation in x86 and AMD platforms, emphasizing integration, thermal resilience, and VRM specification compliance.
FAQ
What is the operating temperature range for the ISL6568IRZA?
The ISL6568IRZA 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 is confirmed in the "Recommended Operating Conditions" table on page 6 of the FN9187 Rev 5.00 datasheet and distinguishes it from the commercial-grade ISL6568CRZ (0°C to +70°C). The ISL6568IRZA maintains ±0.5% system accuracy across this full range.
Does the ISL6568IRZA support AMD Hammer VID codes?
Yes, the ISL6568IRZA fully supports AMD Hammer VID codes through its 5-bit VID interface (VID0–VID4) and VID12.5 pin configuration. When VID12.5 is pulled to +5 V via a 5 kΩ resistor, the internal DAC decodes AMD-specific voltage levels from 0.800 V to 1.550 V in 25-mV steps, as detailed in Table 2 of the FN9187 datasheet. This capability is identical across all ISL6568 variants, including the ISL6568IRZA.
How is overcurrent protection configured on the ISL6568IRZA?
Overcurrent protection on the ISL6568IRZA is set using the OCSET pin, which sinks a precise 100 µA ±7% current. Connecting a resistor from OCSET to ICOMP creates a voltage threshold - for example, a 10 kΩ resistor yields a 1.0 V trip point. This voltage is compared against the summed DCR-sensed current signal at ISUM. The ISL6568IRZA triggers shutdown if ISUM exceeds OCSET, and the trip level remains stable across temperature due to matched internal references.
Can the ISL6568IRZA operate in single-phase mode?
Yes, the ISL6568IRZA can be configured for single-phase operation by connecting both BOOT2 and PHASE2 pins to +12 V. This disables phase-2 driver circuitry and forces PWM2 to remain inactive, effectively converting the controller into a single-phase buck regulator. All VID decoding, remote sensing, and DCR droop functions remain fully operational - confirmed in the "PWM Operation" section (page 10) of the FN9187 datasheet.
What package type does the ISL6568IRZA use?
The ISL6568IRZA uses a 32-lead, 5 mm × 5 mm, 0.5 mm pitch QFN package with exposed thermal pad (Intersil pkg drawing L32.5x5). This RoHS-compliant, Pb-free package is shared across the entire ISL6568 family, including ISL6568CRZ and ISL6568IRZ variants. The thermal resistance is θJA = 35°C/W and θJC = 5°C/W, enabling efficient heat transfer in high-power VRM layouts.
ISL6568IRZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-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:
- 0.84V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ISL6568IRZA FAQ
1.How can I place an order for ISL6568IRZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6568IRZA 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 ISL6568IRZA reliable?
The price and inventory of ISL6568IRZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6568IRZA is usually 5 days.
3.What payment methods are accepted for ISL6568IRZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6568IRZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6568IRZA?
ISL6568IRZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6568IRZA 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 ISL6568IRZA?
For technical support, including ISL6568IRZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6568IRZA requirements.
6.How does Aetrix verify that ISL6568IRZA is sourced from the original manufacturer or authorized distributors?
All ISL6568IRZA 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 ISL6568IRZA meets industry standards.
7.What is the process for return or replacement of ISL6568IRZA?
All ISL6568IRZA units undergo pre-shipment inspection (PSI). If there is an issue with ISL6568IRZA, 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 ISL6568IRZA part is unused and in its original packaging.
Return procedure for ISL6568IRZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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