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Renesas ISL6568CRZ-T
- Part No.:
- ISL6568CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6568CRZ-T.pdf
- Description:
- IC CTLR PWM BUCK 2PHASE 32-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
ISL6568CRZ-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 1–2-phase operation, delivers ±0.5% system accuracy over temperature, enables DCR- and rDS(ON)-based current sensing, and operates up to 1.5 MHz per phase.
For engineers reviewing the ISL6568CRZ-T datasheet, ISL6568CRZ-T pinout, ISL6568CRZ-T application, or ISL6568CRZ-T equivalent, key selection considerations include its dual-current-sensing architecture (DCR droop + rDS(ON) channel balancing), programmable VID decoding across three standards, differential remote sensing, and integrated gate drivers eliminating external driver ICs in VRM-compliant CPU power stages.
Technical Context
The ISL6568CRZ-T implements a two-phase interleaved synchronous buck topology with adaptive non-overlap timing and shoot-through protection. Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product, supporting stable loop compensation via FB/COMP/REF network.
It integrates dual independent current-sense paths: continuous inductor DCR sensing (via ISUM/IREF/ICOMP) for load-line droop and overcurrent protection, and cycle-by-cycle rDS(ON) sensing (via ISEN1/ISEN2) for precise per-channel current balancing - both validated for simultaneous use in the same design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Two-phase synchronous buck PWM controller with integrated high- and low-side gate drivers |
| VID Compatibility | Programmable for Intel VRM9, VRM10, and AMD Hammer DAC codes via VID0–VID4 and VID12.5 pin configuration |
| System Accuracy | ±0.5% over temperature (VID = 1.0V–1.85V), enabling tight microprocessor core voltage tolerance |
| Current Sensing | Dual-mode: lossless DCR sensing (for droop & OCP) + rDS(ON) sensing (for channel-current balance) |
| Switching Frequency | Selectable up to 1.5 MHz per phase via FS pin resistor; typical 250 kHz at RT = 100 kΩ |
| Operating Temp | 0°C to +70°C ambient (CRZ grade), suitable for commercial-server and desktop CPU VRM applications |
| Package | 32-lead 5 mm × 5 mm QFN with exposed thermal pad (Pb-free, RoHS compliant) |
Pinout & Package
ISL6568CRZ-T is housed in a 32-lead, 5 mm × 5 mm QFN package (pkg drawing L32.5x5) with exposed thermal pad for enhanced thermal performance. Pin functions are validated per FN9187 Rev 5.00 datasheet Figure 1 (Top View).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE1 / UGATE2 | Upper MOSFET gate drive outputs | Drive high-side N-channel MOSFET gates with adaptive non-overlap timing; support 5–12 V PVCC bias |
| LGATE1 / LGATE2 | Lower MOSFET gate drive outputs | Drive synchronous rectifier gates; sink/source capability optimized for fast turn-on/turn-off (tRLGATE = 18 ns typ) |
| VSEN / RGND | Differential remote sense inputs | Enable precision voltage regulation at load point by rejecting PCB IR drop between controller and CPU VDD/VSS |
| ISEN1 / ISEN2 | rDS(ON) current sense inputs | Sample lower-FET conduction voltage to derive per-phase current for real-time channel balancing |
| ISUM / IREF / ICOMP | DCR current sense interface | Support lossless inductor DCR sensing network for load-line droop programming and overcurrent protection |
| VID0–VID4, VID12.5 | Digital voltage identification inputs | Decode 5-/6-bit VID code into reference voltage; VID12.5 selects VRM9/VRM10/AMD Hammer DAC mapping |
| OCSET | Overcurrent threshold set input | 100 µA current source sets OCP trip point via external resistor; enables accurate, adjustable current limiting |
| ENLL | Enable logic input | 0.66 V threshold enable with 100 mV hysteresis; internal 1 µA pull-up allows simple logic-level control |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-phase gate drivers | Eliminates need for external driver ICs; reduces BOM count and layout area in space-constrained VRM designs |
| Dual current-sensing architecture | Combines DCR-based droop/OCP and rDS(ON)-based channel balancing-no compromise between accuracy and efficiency |
| Differential remote voltage sensing | Compensates for PCB trace resistance between controller and CPU, ensuring ±0.5% regulation at point-of-load |
| Dynamic VID-on-the-fly | Supports real-time voltage scaling during processor P-state transitions without output disturbance or reconfiguration delay |
| Multi-tiered overvoltage protection | Clamps output via lower-FET turn-on on OVP detection; includes open-sense-line detection and thermal shutdown at +160°C |
Applications
| Desktop CPU Power Delivery | Server Processor VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-core or quad-core Intel Pentium 4 or AMD Athlon 64 processors in ATX desktop motherboards. IC Role / Device Role / Timing Role: Primary two-phase PWM controller managing gate timing, current sharing, and VID decoding for CPU VDD rail. Use Value: Enables stable 1.0–1.55 V output with <±0.5% accuracy and fast transient response required by VRM9/VRM10 specifications. | Use Scenario: Powering multi-socket Xeon or Opteron processors in 1U/2U rack servers with strict thermal and efficiency targets. IC Role / Device Role / Timing Role: Dual-phase controller implementing interleaved switching to reduce input/output ripple and improve thermal distribution across MOSFETs. Use Value: Lowers RMS input capacitor current by ~50% vs. single-phase, reducing input cap count and board area while maintaining 36 A+ load capability. |
| Laptop CPU Voltage Regulator | Embedded x86 Platform Power |
Use Scenario: Core voltage regulation for mobile Intel Core or AMD Turion processors in space-constrained notebook platforms. IC Role / Device Role / Timing Role: Compact two-phase controller with integrated drivers, supporting dynamic VID scaling during C-state transitions. Use Value: Achieves high efficiency (>90%) and low output ripple using small 5×5 mm QFN package and 1.5 MHz max switching frequency. | Use Scenario: Power management for industrial embedded x86 modules (e.g., COM Express Type 6) requiring VRM-compliant CPU rails. IC Role / Device Role / Timing Role: Robust VRM controller with thermal shutdown, OVP/UVP, and remote sensing for long-life, unattended operation. Use Value: Ensures reliable CPU operation across -40°C to +70°C ambient via CRZ-grade rating and fault-protected startup sequence. |
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 |
|---|---|---|---|
| ISL6568IRZ-T | Same silicon, extended temperature range (-40°C to +85°C); identical pinout, electrical specs, and feature set | Required for industrial or telecom base station applications where ambient exceeds +70°C | Select ISL6568IRZ-T when operating outside 0°C–70°C commercial range; otherwise ISL6568CRZ-T is cost-optimized |
| RT8802AGQW | Single-chip two-phase controller with integrated drivers; supports VRM10/11 but lacks AMD Hammer VID mode and rDS(ON) current sensing | Used in newer Intel platform designs; not suitable for legacy AMD Hammer or mixed-VID environments | Choose RT8802AGQW only for VRM10/11-only Intel designs needing higher integration density; ISL6568CRZ-T remains preferred for AMD compatibility and dual-sensing flexibility |
Compared with ISL6568IRZ-T, the ISL6568CRZ-T offers identical functionality at lower cost for commercial-temperature applications; compared with RT8802AGQW, it provides broader VID standard support and superior current-sensing versatility for legacy and hybrid-platform designs.
Availability
ISL6568CRZ-T is available at Aetrix Electronics and suitable for desktop motherboard design, server VRM development, and embedded x86 platform power supply applications requiring stable component supply, full RoHS compliance, and long-term lifecycle support.
Supply support for ISL6568CRZ-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 ISL6568 family. Renesas is a global semiconductor leader specializing in analog, power, and embedded processing solutions.
The ISL6568 belongs to Renesas' high-performance power management IC portfolio, engineered specifically for precision, multi-phase CPU core voltage regulation in desktop, server, and embedded computing platforms adhering to Intel VRM and AMD Hammer specifications.
FAQ
What is the operating temperature range of the ISL6568CRZ-T?
The ISL6568CRZ-T is rated for 0°C to +70°C ambient operating temperature, making it suitable for commercial-grade desktop and embedded applications. This is confirmed in the Ordering Information table on page 2 of FN9187 Rev 5.00, which specifies "0 to +70°C" for all CRZ-suffix variants including ISL6568CRZ-T. The extended-range ISL6568IRZ-T variant supports -40°C to +85°C.
Does the ISL6568CRZ-T support AMD Hammer microprocessors?
Yes, the ISL6568CRZ-T fully supports AMD Hammer microprocessors via configurable VID decoding. As detailed in Table 1 and Table 2 of FN9187 Rev 5.00, connecting VID12.5 to +5V through a 5 kΩ resistor selects the AMD Hammer DAC code set, enabling output voltages from 0.800 V to 1.550 V in 25 mV steps. This mode is functionally identical across all CRZ-suffix parts.
How does the ISL6568CRZ-T implement current sensing for channel balancing?
The ISL6568CRZ-T uses rDS(ON) current sensing on ISEN1 and ISEN2 pins to achieve per-phase current balancing. As shown in Figure 5 and Equation 3 on page 11 of FN9187 Rev 5.00, each ISEN pin measures voltage across an external resistor tied to the lower MOSFET source, generating a current proportional to IL. This sampled signal feeds the patented channel-balance algorithm that adjusts PWM pulse widths in real time.
Can the ISL6568CRZ-T operate in single-phase mode?
Yes, the ISL6568CRZ-T can be configured for single-phase operation by connecting both BOOT2 and PHASE2 pins to +12 V, as stated in the "PWM Operation" section on page 10 of FN9187 Rev 5.00. In this mode, only channel 1 is active, and the controller behaves as a single-phase buck controller with full feature retention including DCR sensing, remote sensing, and VID decoding.
What package type and lead count does the ISL6568CRZ-T use?
The ISL6568CRZ-T uses a 32-lead, 5 mm × 5 mm QFN package with exposed thermal pad (package drawing L32.5x5), as specified in the Ordering Information table on page 2 of FN9187 Rev 5.00. This Pb-free, RoHS-compliant package supports reflow soldering per JEDEC J-STD-020 and provides low θJA (35°C/W) for efficient thermal dissipation in high-current VRM layouts.
ISL6568CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Applications:
- -
- Voltage - Input:
- 3 ~ 12V
- Number of Outputs:
- -
- Voltage - Output:
- 0.84 ~ 1.6V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ISL6568CRZ-T FAQ
1.How can I place an order for ISL6568CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6568CRZ-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 ISL6568CRZ-T reliable?
The price and inventory of ISL6568CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6568CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6568CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6568CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6568CRZ-T?
ISL6568CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6568CRZ-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 ISL6568CRZ-T?
For technical support, including ISL6568CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6568CRZ-T requirements.
6.How does Aetrix verify that ISL6568CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6568CRZ-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 ISL6568CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6568CRZ-T?
All ISL6568CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6568CRZ-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 ISL6568CRZ-T part is unused and in its original packaging.
Return procedure for ISL6568CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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