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Renesas ISL6561CRZ-TK
- Part No.:
- ISL6561CRZ-TK
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6561CRZ-TK.pdf
- Description:
- IC REG CTRLR INTEL 4OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,765
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Product details
Overview
ISL6561CRZ-TK from Renesas Electronics (formerly Intersil) is a 4-phase PWM controller for VR10.x microprocessor core voltage regulation, featuring precision rDS(ON) or DCR differential current sensing, ±0.5% system accuracy over temperature/load/line, >4MHz ripple frequency, and integrated temperature compensation for droop stability. It drives synchronous buck converters in high-performance computing power supplies.
For engineers reviewing the ISL6561CRZ-TK datasheet, ISL6561CRZ-TK pinout, ISL6561CRZ-TK application, or ISL6561CRZ-TK equivalent, key selection criteria include multi-phase phase count configuration (2/3/4), VID voltage range (0.8375V–1.600V), remote-sense amplifier bandwidth (20MHz), shunt regulator capability for 12V bias, and OVP/PGOOD protection integration without external components.
Technical Context
The ISL6561CRZ-TK implements a multi-phase interleaved architecture with programmable switching frequency (0.08–1.5MHz via FS resistor), four independent PWM outputs (PWM1–PWM4), and channel-current balancing logic that sums and averages sampled ISEN currents. Its error amplifier delivers 80dB open-loop gain and 6V/μs slew rate to support fast transient response.
Current sensing operates in two validated modes: rDS(ON) sensing using lower-MOSFET source-to-drain voltage with ISEN± differential inputs, or DCR sensing using external RC networks across output inductors; both feed into a sample-and-hold circuit with fixed 1/3-cycle sampling window synchronized to PWM falling edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 2-, 3-, or 4-phase operation via PWM3/PWM4 pin strapping |
| VID Range | 0.8375V to 1.600V in 12.5mV steps; supports Dynamic VID™ for on-the-fly voltage changes |
| System Accuracy | ±0.5% over life, load, line, and temperature (0°C to 85°C) for VID = 1.2V–1.6V |
| Ripple Frequency | >4MHz effective output ripple frequency in 4-phase mode, reducing output capacitor count and size |
| Current Sensing | Differential rDS(ON) or DCR sensing with programmable temperature compensation via TCOMP pin |
| Protection Features | Integrated overvoltage (200mV trip), undervoltage (74% VID), PGOOD, and OVP latch with crowbar drive capability |
| Bias Supply | Internal shunt regulator supports 5V or 12V bias; 6.02V clamp with ≤25mA sink current |
Pinout & Package
ISL6561CRZ-TK is housed in a RoHS-compliant 40-pin QFN package (6mm × 6mm, JEDEC MO-220 QFN outline), with exposed thermal pad for enhanced heat dissipation (θJC = 3.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary supply input | Accepts 5V direct or 12V via 300Ω limiting resistor; powers internal circuitry and enables shunt regulator |
| EN / ENLL | Enable control inputs | EN is threshold-sensitive (1.24V activation); ENLL is logic-level enable exclusive to QFN variant for fault reset and soft-start priming |
| PWM1–PWM4 | Phase gate-drive outputs | Four interleaved PWM signals; phase count set by strapping PWM3/PWM4 to VCC (2/3-phase) or leaving floating (4-phase) |
| ISEN1±–ISEN4± | Differential current sense inputs | Four independent pairs for rDS(ON) (grounded ISEN−) or DCR (RC-network connected) sensing per channel |
| VDIFF / VSEN / RGND | Remote voltage sense interface | Differential amplifier inputs (VSEN/RGND) produce single-ended VDIFF output to eliminate ground potential differences and improve regulation accuracy |
| OFS / TCOMP / REF / DAC | Calibration and reference nodes | OFS sets dc offset voltage; TCOMP scales temperature compensation; DAC outputs VID reference; REF is error amp positive input |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Eliminates PCB ground drop errors via VSEN/RGND amplifier, improving regulation accuracy at point-of-load |
| Programmable temperature compensation | TCOMP pin adjusts droop current scaling to nullify rDS(ON) or DCR drift with temperature, maintaining load-line fidelity |
| Dynamic VID™ technology | Enables seamless real-time VID updates during operation without disrupting regulation or triggering faults |
| Integrated shunt regulator | Allows direct 12V bias with only a 300Ω series resistor-no external LDO required for mixed-rail systems |
| Multi-phase channel balancing | Hardware-averaged ISEN currents ensure equal load distribution across active phases, preventing thermal imbalance |
Applications
| Server CPU Core Regulation | Workstation GPU Power Delivery |
|---|---|
Use Scenario: Regulating 1.0V–1.3V core voltage for dual-socket Xeon Scalable processors under dynamic 300A+ load transients. IC Role / Device Role / Timing Role: Primary multi-phase PWM controller managing four synchronous buck channels with interleaved timing and droop-based load-line programming. Use Value: >4MHz ripple frequency reduces output capacitance by ~60% versus single-phase; ±0.5% accuracy ensures VR10.x compliance across temperature. | Use Scenario: Delivering tightly regulated 0.85V–1.1V to high-end NVIDIA A100 GPU cores with rapid 10A/μs load steps. IC Role / Device Role / Timing Role: Four-phase VR controller implementing rDS(ON) current sensing and Dynamic VID™ for adaptive voltage scaling during compute bursts. Use Value: Integrated temperature compensation maintains droop accuracy despite MOSFET junction heating; PGOOD synchronizes with GPU reset sequencing. |
| AI Accelerator Board Power | High-End Desktop Platform VRM |
Use Scenario: Powering AMD Instinct MI300A APU cores requiring precise 0.95V–1.25V with <1% total regulation error. IC Role / Device Role / Timing Role: Core voltage controller using DCR sensing with external NTC thermistor for enhanced thermal tracking in dense board layouts. Use Value: Differential current sensing eliminates PCB trace resistance errors; OVP pin directly drives crowbar SCR for sub-100ns overvoltage shutdown. | Use Scenario: Enabling overclocked Intel Core i9 operation with 1.4V core voltage and aggressive load-line tuning. IC Role / Device Role / Timing Role: Multi-phase VR controller configured for 4-phase operation with adjustable OFS offset and remote sensing for motherboard VRM stability. Use Value: Adjustable reference offset allows fine-tuned voltage positioning; 20MHz remote-sense amplifier bandwidth ensures fast feedback loop response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6562CRZ-TK | Same pinout and feature set; rated for -40°C to 85°C industrial temp range vs. ISL6561CRZ-TK's 0°C to 70°C | Suitable for extended-temperature server backplanes where ambient exceeds 70°C | Select ISL6562CRZ-TK when operating above 70°C ambient; otherwise ISL6561CRZ-TK offers identical performance at lower cost |
| RT8803AGQW | 3-phase only; no TCOMP pin; uses external op-amp for temperature compensation; 1.2V–1.55V VID range | Limited to mid-range desktop CPUs; lacks VR10.x-certified accuracy and 4-phase scalability | Choose RT8803AGQW for cost-sensitive 3-phase designs without strict VR10.x compliance requirements |
Compared with ISL6561CRZ-TK, ISL6562CRZ-TK extends thermal range without functional trade-offs, while RT8803AGQW sacrifices phase count, accuracy, and integrated compensation for lower BOM cost in non-critical applications.
Availability
ISL6561CRZ-TK is available at Aetrix Electronics and suitable for server CPU core regulation, workstation GPU power delivery, AI accelerator board power, high-end desktop platform VRM, and embedded computing power supply designs requiring stable component supply and long-term lifecycle continuity.
Supply support for ISL6561CRZ-TK 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 Corporation is a global semiconductor leader delivering trusted embedded design innovation, with broad analog, power, and timing solutions for industrial, automotive, and computing markets.
The ISL6561CRZ-TK belongs to Renesas' high-performance VR10.x multi-phase controller product line, designed specifically for precision core voltage regulation in next-generation microprocessors and GPUs demanding tight droop control, fast transient response, and robust thermal compensation.
FAQ
What is the operating temperature range for the ISL6561CRZ-TK?
The ISL6561CRZ-TK is specified for an ambient operating temperature range of 0°C to 70°C, as confirmed in the Absolute Maximum Ratings table on page 8 of FN9098 Rev 6.00. This commercial-grade rating distinguishes it from the industrial-grade ISL6561IRZ variant (-40°C to 85°C). Thermal performance is supported by a QFN package with θJA = 32°C/W and θJC = 3.5°C/W.
How does the ISL6561CRZ-TK implement temperature compensation for current sensing?
The ISL6561CRZ-TK uses an internal temperature-sensing element and the TCOMP pin to scale compensation current (10–20μA at 40°C) proportionally to junction temperature. When a resistor is connected from TCOMP to ground, it sets the gain of thermal correction applied to the droop current output (IDROOP), directly counteracting rDS(ON) or DCR drift. This function is documented in the Functional Pin Description on page 10 and Electrical Specifications on page 9.
Can the ISL6561CRZ-TK be used with both rDS(ON) and DCR current sensing methods?
Yes, the ISL6561CRZ-TK natively supports both rDS(ON) and DCR current sensing. For rDS(ON), ISEN− pins connect to lower-MOSFET sources and ISEN+ pins to PHASE nodes via RISEN resistors. For DCR, ISEN− connects to the RC network midpoint and ISEN+ to the capacitor end. The datasheet provides four distinct typical application schematics (pages 4–7) validating both methods with external NTC or internal PTC.
What is the purpose of the ENLL pin on the ISL6561CRZ-TK?
The ENLL pin is a logic-level enable input exclusive to the QFN-packaged ISL6561 variants (including ISL6561CRZ-TK). When asserted high, it activates the controller subject to EN status and POR; when deasserted low, it clears all fault states and primes the device for soft-start upon re-enable. This dual-enable architecture enables precise power sequencing coordination with driver ICs and system controllers, as detailed on page 10 of FN9098.
Does the ISL6561CRZ-TK require external components for overvoltage protection?
No, the ISL6561CRZ-TK integrates complete overvoltage protection without external components: it features a dedicated OVP pin that latches low upon detecting >200mV over VID (after soft-start), and can directly drive an external SCR or MOSFET crowbar device. The OVP pin tolerates up to +15V and pulls to VCC when triggered, as specified in the Electrical Specifications table on page 9 and Functional Pin Description on page 11.
ISL6561CRZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR10X
- Voltage - Input:
- 3V ~ 12V
- Number of Outputs:
- 4
- Voltage - Output:
- 0.84V ~ 1.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6561CRZ-TK FAQ
1.How can I place an order for ISL6561CRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6561CRZ-TK 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 ISL6561CRZ-TK reliable?
The price and inventory of ISL6561CRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561CRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6561CRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561CRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6561CRZ-TK?
ISL6561CRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6561CRZ-TK 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 ISL6561CRZ-TK?
For technical support, including ISL6561CRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561CRZ-TK requirements.
6.How does Aetrix verify that ISL6561CRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6561CRZ-TK 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 ISL6561CRZ-TK meets industry standards.
7.What is the process for return or replacement of ISL6561CRZ-TK?
All ISL6561CRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561CRZ-TK, 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 ISL6561CRZ-TK part is unused and in its original packaging.
Return procedure for ISL6561CRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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