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Renesas ISL6561CRZ
- Part No.:
- ISL6561CRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6561CRZ.pdf
- Description:
- IC REG CTRLR INTEL 4OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,439
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Product details
Overview
ISL6561CRZ 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, 0°C to 70°C operating range, and 40-pin QFN package. It drives synchronous buck channels with >4MHz ripple frequency for fast transient response in high-performance CPU power delivery.
For engineers reviewing the ISL6561CRZ datasheet, ISL6561CRZ pinout, ISL6561CRZ application, or ISL6561CRZ equivalent, key selection considerations include multi-phase droop programming, temperature-compensated current sensing, Dynamic VID™ compatibility, and 2-/3-/4-phase configuration via PWM3/PWM4 logic states.
Technical Context
The ISL6561CRZ implements a multi-phase interleaved PWM architecture with independent channel current sampling during forced off-time, enabling precise per-channel current balancing and load-line regulation. Its error amplifier features 80dB open-loop gain and 18MHz bandwidth, paired with a sawtooth oscillator adjustable from 0.08–1.5MHz via FS resistor.
Current sensing supports both rDS(ON) and DCR methods: rDS(ON) mode uses ISEN± pins referenced to lower MOSFET sources and phase nodes; DCR mode employs external RC networks across inductors. Temperature compensation is applied via TCOMP pin with 1μA/V/°C transconductance to nullify rDS(ON)/DCR thermal drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to 70°C ambient - defines industrial-grade thermal envelope for stable operation without derating. |
| Phase Configuration | 2-, 3-, or 4-phase selectable via PWM3/PWM4 logic levels - enables flexible scalability from low- to high-current CPU loads. |
| System Accuracy | ±0.5% over life, load, line, and temperature (VID = 1.2V–1.6V) - ensures tight output voltage positioning under dynamic load conditions. |
| Current Sensing | Differential rDS(ON) or DCR sensing with programmable temperature compensation - eliminates need for sense resistors while maintaining <±5% current measurement error. |
| Oscillator Range | 0.08–1.5MHz via FS-to-ground resistor - allows optimization of EMI, efficiency, and component size across input/output voltage combinations. |
| VID Interface | 6-bit Dynamic VID™ with 12.5mV steps (0.8375V–1.600V) - supports real-time voltage scaling during processor P-state transitions. |
| Protection Features | Overvoltage (200mV above VID), undervoltage (74% of VID), and overcurrent trip (110μA typical) - provides autonomous fault detection without external circuitry. |
Pinout & Package
ISL6561CRZ 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). The package supports Pb-free reflow profiles and achieves θJA = 32°C/W on standard PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Accepts 5V direct or 12V via 300Ω limiting resistor; internal shunt regulator clamps at 6.02V max. |
| EN / ENLL | Enable control | EN: threshold-sensitive (1.24V rising); ENLL: logic-level enable (QFN-only); both required for fault reset and soft-start initiation. |
| PWM1–PWM4 | Phase gate drivers | Open-drain outputs driving external MOSFET drivers; phase count set by PWM3/PWM4 logic state (VCC = active). |
| ISEN1+ to ISEN4− | Differential current sense inputs | Four independent pairs for rDS(ON) or DCR sensing; unused channels left floating (e.g., ISEN4± for 3-phase config). |
| VDIFF / VSEN / RGND | Remote voltage sensing | VSEN/RGND form differential input; VDIFF is single-ended output feeding FB/COMP loop - eliminates ground offset errors. |
| TCOMP | Temperature compensation | Resistor-to-ground scales compensation current (10–20μA at 40°C) to correct rDS(ON)/DCR thermal drift in droop programming. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Eliminates PCB ground potential differences between controller and CPU, improving regulation accuracy to ±0.5% and protection threshold stability. |
| Programmable temperature compensation | Nullifies rDS(ON) or DCR resistance increase with temperature, preserving droop slope accuracy across 0°C–70°C ambient range. |
| Dynamic VID™ technology | Enables seamless on-the-fly voltage changes during CPU P-state transitions without interrupting regulation or triggering faults. |
| Adjustable reference offset | Allows precise dc offset (via OFS pin resistor to GND/VCC) independent of VID setting - critical for custom load-line implementation. |
| Internal shunt regulator | Supports 12V bias supply using only a 300Ω series resistor, eliminating need for external LDO and reducing BOM count. |
Applications
| Server CPU Power Delivery | Workstation GPU Core Regulation |
|---|---|
Use Scenario: High-current, fast-transient power delivery to dual-socket Xeon processors in 1U rack servers. IC Role / Device Role / Timing Role: 4-phase PWM controller managing up to 200A total load with interleaved switching to suppress input/output ripple. Use Value: >4MHz effective ripple frequency reduces bulk capacitor count by 40% versus single-phase designs while maintaining <±10mV output deviation during 50A/μs load steps. | Use Scenario: Precision core voltage regulation for NVIDIA A-series datacenter GPUs requiring strict VID compliance and thermal-aware droop. IC Role / Device Role / Timing Role: Multi-phase controller implementing DCR current sensing with TCOMP-driven temperature compensation for stable load-line across die temperature gradients. Use Value: ±0.5% system accuracy ensures GPU voltage remains within Intel VR10.x spec limits even during sustained 85°C junction operation. |
| High-Performance Desktop Motherboard VRM | Industrial Embedded CPU Module |
Use Scenario: Compact 4-phase VRM on ATX motherboard supporting Intel Core i9 with adaptive voltage scaling. IC Role / Device Role / Timing Role: PWM controller using rDS(ON) sensing and Dynamic VID™ to coordinate voltage changes with CPU C-state transitions. Use Value: Threshold-sensitive EN/ENLL inputs synchronize startup with chipset POR, preventing brown-out during cold boot sequences. | Use Scenario: Ruggedized CPU power solution for fanless industrial PCs operating in uncontrolled ambient environments (0°C–70°C). IC Role / Device Role / Timing Role: Industrial-grade controller with guaranteed 0°C–70°C operation, integrated OVP/OCP, and no external components required for protection. Use Value: Built-in shunt regulator enables direct 12V rail usage, simplifying power architecture and eliminating failure points in long-lifecycle deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6561IRZ | Wider operating temperature range: -40°C to 85°C; identical electrical specs and pinout. | Suitable for extended-temperature industrial or telecom applications where ambient exceeds 70°C. | Select ISL6561IRZ when board-level thermal management cannot guarantee junction temperature stays below 150°C at 70°C ambient. |
| RT8803AGQW | 3-phase only; supports Intel IMVP-8/9; lacks TCOMP pin and programmable temperature compensation. | Targeted at mid-range mobile/desktop CPUs with lower current demands and fixed thermal profiles. | Choose RT8803AGQW only if phase count, VID protocol, and thermal compensation requirements align - not a drop-in replacement. |
Compared with ISL6561IRZ, the ISL6561CRZ trades extended temperature capability for cost and qualification in commercial environments; versus RT8803AGQW, it offers superior thermal adaptability and 4-phase flexibility but requires more complex layout for full feature utilization.
Availability
ISL6561CRZ is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU core regulation, and high-performance desktop motherboard VRMs requiring stable component supply across production lifecycles.
Supply support for ISL6561CRZ 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 its high-performance analog and power management portfolio. Renesas specializes in robust, application-specific ICs for computing, industrial, and automotive markets.
The ISL6561CRZ belongs to Renesas' VR10.x-compliant multi-phase PWM controller product line, designed specifically for precision core voltage regulation in high-current microprocessor systems with stringent transient and thermal requirements.
FAQ
What is the maximum supported switching frequency for the ISL6561CRZ?
The ISL6561CRZ supports an oscillator adjustment range of 0.08MHz to 1.5MHz via the FS pin resistor. Its ripple frequency exceeds 4MHz in 4-phase operation due to interleaving - a key design feature enabling reduced output capacitance and improved transient response. This specification is confirmed in the Electrical Specifications table on page 9 of FN9098 Rev 6.00.
Does the ISL6561CRZ support both rDS(ON) and DCR current sensing methods?
Yes, the ISL6561CRZ supports both rDS(ON) and DCR current sensing. For rDS(ON), ISEN± pins connect to lower MOSFET sources and phase nodes; for DCR, external RC networks interface with inductor windings. The Functional Pin Description on page 10 explicitly confirms dual-mode operation, and Figures 6–9 illustrate both configurations with equations validating current scaling.
How does temperature compensation work in the ISL6561CRZ?
The ISL6561CRZ uses an internal temperature-sensing element and the TCOMP pin to apply programmable compensation. A resistor from TCOMP to ground sets compensation current (10–20μA at 40°C) with 1μA/V/°C transconductance, adjusting droop current to counteract rDS(ON) or DCR thermal drift. This is detailed in the "Temperature Compensation" section on page 9 and functional description on page 11 of FN9098.
What is the purpose of the ENLL pin on the ISL6561CRZ?
The ENLL pin is a logic-level enable input exclusive to the QFN package (including ISL6561CRZ). When asserted high, it enables the controller subject to EN status, POR, and fault conditions. Deasserting ENLL clears all faults and primes soft-start - a critical reset mechanism not available on SOIC variants. This is specified in the Functional Pin Description on page 10 of FN9098 Rev 6.00.
Can the ISL6561CRZ be configured for fewer than four phases?
Yes, the ISL6561CRZ supports 2-, 3-, or 4-phase operation. Tie PWM3 to VCC for 2-phase; tie PWM4 to VCC for 3-phase; leave both floating for default 4-phase. Inactive channels require corresponding ISEN± pins to remain unconnected - confirmed in the Functional Pin Description on page 10 and PWM Operation section on page 12 of FN9098.
ISL6561CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL6561CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6561CRZ 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 reliable?
The price and inventory of ISL6561CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561CRZ is usually 5 days.
3.What payment methods are accepted for ISL6561CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6561CRZ?
ISL6561CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6561CRZ 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?
For technical support, including ISL6561CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561CRZ requirements.
6.How does Aetrix verify that ISL6561CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6561CRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL6561CRZ?
All ISL6561CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561CRZ, 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 part is unused and in its original packaging.
Return procedure for ISL6561CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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