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Renesas ISL6568IRZ-T
- Part No.:
- ISL6568IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6568IRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,530
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Product details
Overview
ISL6568IRZ-T from Intersil is a two-phase buck PWM controller with integrated MOSFET drivers, designed for precision core voltage regulation in Intel VRM9/VRM10 and AMD Hammer microprocessor power delivery. It supports 1–2-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 1.5MHz per phase in a -40°C to +85°C ambient range.
For engineers reviewing the ISL6568IRZ-T datasheet, ISL6568IRZ-T pinout, ISL6568IRZ-T application, or ISL6568IRZ-T equivalent, this controller enables high-efficiency, space-optimized CPU VRMs with differential remote sensing, dynamic VID-on-the-fly, programmable offset, and multi-tiered OVP/UVP/OCP protection - critical for server, workstation, and high-end desktop power design.
Technical Context
The ISL6568IRZ-T implements interleaved two-phase PWM control using an internal sawtooth oscillator with frequency set by an external resistor on FS (225–275 kHz typical), and supports single-phase mode via BOOT2/PHASE2 tie-high. Its error amplifier features 96dB DC gain and 20MHz GBW, driving COMP to regulate VOUT via FB/VDIFF feedback incorporating both remote-sense differential voltage and DCR-based droop compensation.
Current sensing combines lossless rDS(ON) sampling on ISEN1/ISEN2 for real-time channel-current balancing and continuous inductor DCR sensing via ISUM/IREF/ICOMP for accurate load-line positioning and overcurrent detection. Protection logic includes adaptive shoot-through prevention, open-sense-line detection (VDIFF threshold), thermal shutdown at +160°C, and asymmetric OVP thresholds dependent on VID configuration (VRM9/VRM10/Hammer).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade CPU VRM deployment in servers and embedded computing platforms. |
| Switching Frequency | 225–275 kHz (typical, RT = 100kΩ); up to 1.5 MHz per phase - enables compact magnetics and low-output-ripple designs. |
| System Accuracy | ±0.5% over temp (VID = 1.0–1.85V); ±0.8% (VID = 0.8–1.0V) - ensures tight core voltage tolerance under dynamic CPU load transitions. |
| Current Sensing | DCR + rDS(ON) dual-mode - DCR provides precise droop and OCP; rDS(ON) enables per-channel current matching without sense resistors. |
| VID Compatibility | 6-bit DAC supporting Intel VRM9.0, VRM10.0, and AMD Hammer codes - enables drop-in compatibility across multiple CPU generations. |
| Gate Drive | Integrated UGATE/LGATE drivers with 1.25Ω upper source / 0.6Ω lower sink resistance - drives standard N-channel MOSFETs without external drivers. |
| Protection Features | OVP (VID+125–175mV), UVP (82% VID), OCSET trip at 100µA, open-sense-line detection, thermal shutdown - safeguards CPU and power stage under fault conditions. |
Pinout & Package
ISL6568IRZ-T is housed in a 32-lead, 5mm × 5mm, 0.5mm pitch QFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN9187 Rev 5.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | DAC input interface | Set output voltage via 5–6-bit digital code; VID12.5 selects VRM9/VRM10/AMD Hammer DAC mapping. |
| UGATE1/UGATE2 | Upper MOSFET gate driver output | Drives high-side N-MOS gates with adaptive non-overlap timing to prevent shoot-through. |
| LGATE1/LGATE2 | Lower MOSFET gate driver output | Drives synchronous rectifier gates; fast 12ns fall time minimizes conduction loss. |
| VSEN/RGND | Differential remote sense inputs | Measure true load voltage at CPU pads; compensates for PCB IR drop between VRM and processor. |
| ISEN1/ISEN2 | rDS(ON) current sense inputs | Sample lower-FET conduction voltage to derive per-phase current for balancing without shunts. |
| ISUM/IREF/ICOMP | DCR current sense amplifier terminals | Implement lossless inductor current sensing for droop programming and overcurrent protection. |
| ENLL | Enable input with 0.66V threshold | Logic-level enable/disable with 100mV hysteresis; internal 1µA pull-up simplifies sequencing. |
| PGOOD | Power-good status output | Open-drain signal asserted high only when VOUT is within ±5% OVP/UVP limits post-soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Dual current sensing architecture | Simultaneous rDS(ON) (channel balance) and DCR (droop + OCP) sensing eliminates need for discrete current-sense resistors and improves thermal distribution. |
| Differential remote voltage sensing | VSEN/RGND inputs with unity-gain amplifier reject ground noise and ensure ±0.5% regulation accuracy at CPU die, not VRM output. |
| Programmable reference offset | OFS pin sinks or sources 50µA ±2.5% to generate positive/negative DC offset across FB–VDIFF resistor - enables fine-tuning of load-line slope. |
| Dynamic VID-on-the-fly | Supports real-time VID code updates during operation without reset or soft-start interruption - essential for CPU frequency/voltage scaling (SpeedStep, Cool'n'Quiet). |
| Multi-tiered overvoltage protection | Three OVP levels: clamping (lower FET ON), fast shutdown (VID+150mV), and disable-triggered (VID+175mV) - prevents CPU damage under transient overvoltage events. |
Applications
| Server CPU Power Delivery | Workstation VRM Design |
|---|---|
|
Use Scenario: Dual-socket Xeon or EPYC platform requiring stable 1.0–1.3V core rail at up to 200A with tight transient response. IC Role / Device Role / Timing Role: Two-phase PWM controller managing parallel buck stages, synchronizing gate drive timing, and enforcing current sharing across phases. Use Value: Enables <1% output voltage deviation during 50A/µs CPU load steps while maintaining thermal balance across MOSFETs and reducing output capacitor count by 40% vs. single-phase. |
Use Scenario: High-end CAD/CAM workstation with multi-core Intel Core i9 or AMD Ryzen Threadripper CPU demanding low-noise, high-accuracy VDDIO and VDDCR rails. IC Role / Device Role / Timing Role: Precision voltage regulator IC implementing differential remote sensing, programmable droop, and dynamic VID to match CPU DVFS requirements. Use Value: Delivers ±0.5% system accuracy over -40°C to +85°C and supports seamless VID transitions during real-time performance boosting - critical for sustained compute workloads. |
| Embedded Computing Platform | Industrial Control CPU Module |
|
Use Scenario: Fanless edge AI appliance using Intel Atom x6000E or AMD Embedded R-series SoC with strict thermal envelope and no airflow. IC Role / Device Role / Timing Role: Integrated PWM controller with MOSFET drivers and thermal shutdown, minimizing BOM count and PCB area in space-constrained modules. Use Value: Reduces component count by integrating drivers and supports 12V input-to-1.1V output conversion with <15mV droop - extends thermal margin and eliminates need for external driver ICs. |
Use Scenario: DIN-rail mounted PLC controller with ARM Cortex-A72 or x86 industrial CPU operating in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade VRM controller providing robust overvoltage, undervoltage, and open-sense-line protection for mission-critical uptime. Use Value: Guarantees safe shutdown within 100ns of OVP event and detects broken sense traces before CPU damage occurs - meets IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6566CRZ-T | Same architecture but rated for 0°C to +70°C only; lacks ENLL hysteresis and has reduced OCSET accuracy (±10µA vs. ±5µA). | Suitable for commercial desktop motherboards but not industrial or extended-temp server boards. | Select ISL6566CRZ-T only if ambient temperature stays below 70°C and tighter OCP tolerance is not required. |
| RT8803AGQW | Single-chip 2-phase controller with integrated MOSFET drivers; supports VRM10/11 but no AMD Hammer VID decoding; no DCR sensing - uses only rDS(ON). | Lacks load-line droop capability and remote-sense differential amplifier - requires external compensation for high-accuracy regulation. | Choose RT8803AGQW for cost-sensitive consumer applications where VID flexibility and droop control are secondary to BOM reduction. |
Compared with ISL6568IRZ-T, ISL6566CRZ-T trades industrial temperature range and precision OCP for lower cost, while RT8803AGQW sacrifices AMD compatibility and DCR-based droop for higher integration density - making ISL6568IRZ-T the optimal choice for thermally demanding, multi-architecture CPU power systems requiring guaranteed ±0.5% accuracy and dual-sensing robustness.
Availability
ISL6568IRZ-T is available at Aetrix Electronics and suitable for server CPU power delivery, workstation VRM design, and industrial control CPU modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6568IRZ-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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, communications, and industrial markets.
The ISL6568 product line was engineered specifically for multi-phase CPU voltage regulator modules targeting Intel and AMD microprocessors, emphasizing precision regulation, thermal efficiency, and robust fault protection in dense PCB layouts.
FAQ
What is the maximum operating junction temperature for the ISL6568IRZ-T?
The ISL6568IRZ-T has a maximum junction temperature of +150°C, with thermal shutdown activated at +160°C and recovery at +100°C. This allows reliable operation in high-power CPU VRM applications where ambient temperatures reach +85°C and board-level thermal resistance must be carefully managed using the exposed QFN pad.
Does the ISL6568IRZ-T support AMD Hammer VID codes?
Yes, the ISL6568IRZ-T fully supports AMD Hammer VID codes via the VID12.5 pin: connecting it to +5V through a 5kΩ resistor configures the internal 5-bit DAC for AMD-specific voltage mapping (0.800V to 1.550V in 25mV steps), enabling direct compatibility with Athlon 64 and Opteron processors.
How does the ISL6568IRZ-T implement load-line droop control?
The ISL6568IRZ-T implements load-line droop using continuous inductor DCR current sensing via ISUM/IREF/ICOMP pins. The resulting droop voltage is summed with the differential remote-sense output (VDIFF) to produce a regulated output that decreases linearly with load current - ensuring stable CPU operation under dynamic loads without external compensation components.
Can the ISL6568IRZ-T operate in single-phase mode?
Yes, the ISL6568IRZ-T can be configured for single-phase operation by connecting both BOOT2 and PHASE2 pins to +12V. This disables phase-2 gate drivers and PWM logic, allowing full utilization of the controller's current-sensing, protection, and regulation features in a simplified one-phase topology.
What is the purpose of the OFS pin on the ISL6568IRZ-T?
The OFS pin on the ISL6568IRZ-T sources or sinks a precision 50µA ±2.5% current to generate a programmable DC offset voltage across an external resistor between FB and VDIFF. Connecting the resistor to GND creates negative offset (reducing VOUT under load); connecting to VCC creates positive offset - enabling fine adjustment of droop slope or static voltage setpoint.
ISL6568IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-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:
- 0.84V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ISL6568IRZ-T FAQ
1.How can I place an order for ISL6568IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6568IRZ-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 ISL6568IRZ-T reliable?
The price and inventory of ISL6568IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6568IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6568IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6568IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6568IRZ-T?
ISL6568IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6568IRZ-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 ISL6568IRZ-T?
For technical support, including ISL6568IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6568IRZ-T requirements.
6.How does Aetrix verify that ISL6568IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6568IRZ-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 ISL6568IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6568IRZ-T?
All ISL6568IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6568IRZ-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 ISL6568IRZ-T part is unused and in its original packaging.
Return procedure for ISL6568IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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