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Renesas ISL6568IRZA-T
- Part No.:
- ISL6568IRZA-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6568IRZA-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
ISL6568IRZA-T 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, 225–275 kHz per-phase switching frequency, and dual-method current sensing using both DCR and rDS(ON) techniques.
For engineers reviewing the ISL6568IRZA-T datasheet, ISL6568IRZA-T pinout, ISL6568IRZA-T application, or ISL6568IRZA-T equivalent, this page delivers verified technical context on phase interleaving, remote differential voltage sensing, load-line droop programming, channel-current balancing, and multi-tiered OVP/UVP/OCP protection - all critical for server CPU VRM design validation and BOM optimization.
Technical Context
The ISL6568IRZA-T implements a two-phase interleaved synchronous buck architecture with adaptive non-overlap timing and shoot-through protection logic. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product, enabling stable loop response across wide load transients.
It integrates dual current-sensing paths: continuous inductor DCR sensing for load-line droop and overcurrent protection, and cycle-by-cycle rDS(ON) sampling at the lower MOSFET source for precise per-phase current balance. VID decoding supports selectable 5-/6-bit DAC tables for VRM9, VRM10, and AMD Hammer protocols via the VID12.5 pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade CPU VRM applications requiring extended thermal margin. |
| Switching Frequency | 225–275 kHz per phase - set by external FS-to-ground resistor; enables optimized trade-off between efficiency and EMI filtering size. |
| System Accuracy | ±0.5% (VID = 1.0–1.85 V), ±0.8% (VID = 0.8–1.0 V) - ensures tight core voltage tolerance under full thermal and load variation. |
| Current Sensing | DCR + rDS(ON) dual-mode - DCR path provides lossless load-line droop and OCP; rDS(ON) path enables real-time per-phase current matching without sense resistors. |
| Gate Drive Bias Range | 5 V to 12 V on PVCC - supports wide selection of N-channel MOSFETs with adjustable drive strength and switching speed. |
| VID Compatibility | Intel VRM9, VRM10, and AMD Hammer - selected via VID12.5 pin connection; enables single-controller reuse across multiple CPU platforms. |
| OCP Threshold | 100 µA on OCSET pin - sets overcurrent trip point with ±7% accuracy; allows fine-grained current limit tuning via external resistor. |
Pinout & Package
ISL6568IRZA-T is housed in a 32-lead, 5 mm × 5 mm, 0.5 mm pitch QFN package (Pb-free, RoHS compliant) with exposed thermal pad. The package supports high-power dissipation (θJA = 35°C/W, θJC = 5°C/W) and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5 V ±5% supply for internal logic and error amplifier; requires local 1.0 µF ceramic decoupling. |
| PVCC | Power MOSFET driver supply | +5 V to +12 V gate drive bias; determines UGATE/LGATE output swing and switching speed. |
| UGATE1 / UGATE2 | Upper MOSFET gate drivers | High-side gate outputs with adaptive non-overlap control; max 66% duty cycle per phase. |
| LGATE1 / LGATE2 | Lower MOSFET gate drivers | Synchronous rectifier gate outputs; sink/source resistance <1.35 Ω ensures fast turn-on/turn-off. |
| ISEN1 / ISEN2 | rDS(ON) current sense inputs | Sample lower FET conduction current for per-phase balancing; require external RISEN to PHASEx. |
| VSEN / RGND | Differential remote sense inputs | Measure true load voltage at CPU pads; compensate for PCB IR drop between VRM and processor. |
| ISUM / IREF / ICOMP | DCR current sense interface | Implement lossless droop and OCP via inductor DCR; IREF connects to sum node of output inductors. |
| VID0–VID4, VID12.5 | Digital voltage identification inputs | Decode 5-/6-bit DAC codes; VID12.5 selects VRM9/VRM10/AMD mode via resistor tie-off. |
| OCSET | Overcurrent threshold reference | 100 µA current sink sets OCP trip level; voltage comparison against ISUM triggers shutdown. |
| PGOOD | Power-good status output | Open-drain signal pulled low during UV/OV/fault; remains low until soft-start completes. |
Key Features
| Feature | Design Value |
|---|---|
| Dual current sensing methodology | Simultaneous DCR-based droop/OCP and rDS(ON)-based channel balancing eliminate need for discrete current sense resistors and reduce board area. |
| Differential remote voltage sensing | VSEN/RGND inputs reject ground noise and compensate for up to ~100 mΩ PCB trace resistance between VRM and CPU socket. |
| Programmable reference offset | OFS pin supports positive/negative DC offset via single external resistor - enables fine-tuning of load-line slope or static voltage margin. |
| Dynamic VID-on-the-fly | Supports real-time VID code updates during operation - required for CPU frequency scaling and power-state transitions (C-states). |
| Multi-tiered overvoltage protection | Two independent OVP thresholds: fast clamp (VID + 150 mV) during normal operation and higher threshold (1.62–2.02 V) when disabled - prevents false trips during startup. |
Applications
| Server CPU Core Power Delivery | Workstation VRM for AMD Hammer Processors |
|---|---|
|
Use Scenario: Regulating 0.8–1.55 V core voltage for dual-socket x86 servers with >100 A total load current. IC Role / Device Role / Timing Role: Two-phase PWM controller managing interleaved buck stages, providing dynamic VID decoding, remote sensing, and per-phase current balancing. Use Value: Enables ±0.5% voltage accuracy across -40°C to +85°C ambient, reduces output capacitance by 66% vs. single-phase, and lowers input RMS ripple current by 50%. |
Use Scenario: Powering AMD Opteron processors in high-performance workstations with thermal-aware load-line droop. IC Role / Device Role / Timing Role: VRM controller implementing AMD Hammer VID protocol, DCR-based load-line positioning, and rDS(ON) current matching across two phases. Use Value: Eliminates external current sense resistors, achieves <1% channel current imbalance at full load, and supports programmable droop via IREF/ISUM feedback. |
| Intel VRM10 Compliant Desktop Motherboard | Industrial Embedded CPU Power Module |
|
Use Scenario: Delivering tightly regulated 1.0–1.85 V core voltage for LGA775 desktop CPUs with dynamic frequency scaling. IC Role / Device Role / Timing Role: Dual-phase controller with Dynamic VID-on-the-fly support, digital soft-start, and selectable VRM10 DAC decoding via VID12.5. Use Value: Ensures seamless VID transitions during P-state changes, maintains <2% transient deviation under 50 A/µs load steps, and simplifies layout with integrated drivers. |
Use Scenario: Compact, thermally robust CPU power solution for fanless industrial PCs operating in harsh environments. IC Role / Device Role / Timing Role: Industrial-grade VRM controller with -40°C to +85°C qualification, thermal shutdown at +160°C, and Pb-free QFN packaging. Use Value: Delivers long-term reliability without derating, supports conformal coating due to QFN moisture sensitivity level (MSL3), and enables compact 2-layer PCB implementation. |
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 | Single-phase only; identical VID decoding, DCR/rDS(ON) sensing, and -40°C to +85°C rating but lacks second phase channel and PHASE2/BOOT2 pins. | Suitable for lower-current (<60 A) embedded CPU designs where space or cost constraints preclude two-phase implementation. | Select ISL6566CRZ-T only when load current remains below 50 A and interleaving benefits (ripple reduction, thermal distribution) are not required. |
| RT8803AZSP | Three-phase capable; supports up to 300 kHz switching, includes integrated MOSFET drivers, but lacks AMD Hammer VID support and uses different DCR compensation topology. | Targeted at newer Intel Core i-series platforms requiring three-phase operation and tighter transient response; no native AMD compatibility. | Choose RT8803AZSP for future-proofing with scalable phase count and higher-frequency operation, but verify VID table alignment and droop calibration method. |
Compared with ISL6568IRZA-T, ISL6566CRZ-T reduces phase count and board footprint at the expense of current capacity and ripple suppression, while RT8803AZSP extends phase scalability and frequency range but sacrifices AMD platform support and introduces new loop compensation requirements.
Availability
ISL6568IRZA-T is available at Aetrix Electronics and suitable for server motherboard design, workstation VRM development, and industrial CPU power modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6568IRZA-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 legacy Intersil power management ICs including the ISL6568 family.
The ISL6568 belongs to Intersil's high-precision VRM controller product line, engineered specifically for multi-phase CPU core power delivery with emphasis on accuracy, thermal resilience, and cross-platform VID compatibility.
FAQ
What is the operating temperature range of the ISL6568IRZA-T?
The ISL6568IRZA-T is rated for -40°C to +85°C ambient operation, making it suitable for industrial and server-grade CPU VRM applications where thermal margins exceed commercial-grade alternatives. This rating is confirmed in the "Recommended Operating Conditions" section of the FN9187 datasheet and applies to the ISL6568IRZA-T variant specifically.
Does the ISL6568IRZA-T support AMD Hammer VID codes?
Yes, the ISL6568IRZA-T fully supports AMD Hammer VID codes through configurable VID12.5 pin logic: connecting VID12.5 to +5 V via a 5 kΩ resistor selects the AMD Hammer DAC table. This capability is documented in Table 1 and Table 2 of the FN9187 datasheet and is functionally identical across all ISL6568 variants including ISL6568IRZA-T.
How does the ISL6568IRZA-T implement current balancing between phases?
The ISL6568IRZA-T achieves per-phase current balancing using rDS(ON) current sensing on ISEN1 and ISEN2 pins - sampling lower MOSFET conduction voltage each cycle and adjusting PWM pulse width to force channel currents toward the average. This method avoids external sense resistors and is detailed in Figures 5 and Equation 3 of the FN9187 datasheet.
What package type and lead count does the ISL6568IRZA-T use?
The ISL6568IRZA-T uses a 32-lead, 5 mm × 5 mm QFN package with exposed thermal pad (Pb-free, RoHS compliant), designated as L32.5x5 in Intersil documentation. This package is shared across all ISL6568 variants and is explicitly listed in the "Ordering Information" table on page 2 of FN9187.
Can the ISL6568IRZA-T operate in single-phase mode?
Yes, the ISL6568IRZA-T can be configured for single-phase operation by connecting both BOOT2 and PHASE2 pins to +12 V, which disables the second phase channel. This configuration is described in the "PWM Operation" section (page 10) of FN9187 and preserves all core functions including VID decoding, remote sensing, and DCR-based droop.
ISL6568IRZA-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)
ISL6568IRZA-T FAQ
1.How can I place an order for ISL6568IRZA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6568IRZA-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 ISL6568IRZA-T reliable?
The price and inventory of ISL6568IRZA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6568IRZA-T is usually 5 days.
3.What payment methods are accepted for ISL6568IRZA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6568IRZA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6568IRZA-T?
ISL6568IRZA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6568IRZA-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 ISL6568IRZA-T?
For technical support, including ISL6568IRZA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6568IRZA-T requirements.
6.How does Aetrix verify that ISL6568IRZA-T is sourced from the original manufacturer or authorized distributors?
All ISL6568IRZA-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 ISL6568IRZA-T meets industry standards.
7.What is the process for return or replacement of ISL6568IRZA-T?
All ISL6568IRZA-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6568IRZA-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 ISL6568IRZA-T part is unused and in its original packaging.
Return procedure for ISL6568IRZA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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