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Renesas ISL6561CR-T
- Part No.:
- ISL6561CR-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6561CR-T.pdf
- Description:
- IC REG CTRLR INTEL 4OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,685
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Product details
Overview
ISL6561CR-T from Renesas Electronics (formerly Intersil) is a multi-phase PWM controller for VR10.x microprocessor core voltage regulation, driving up to 4 synchronous-rectified buck channels with precision rDS(ON) or DCR differential current sensing. It delivers ±0.5% system accuracy over life, load, line, and temperature; supports 2/3/4-phase operation; and achieves >4MHz ripple frequency for fast transient response in high-performance CPU power delivery.
For engineers reviewing the ISL6561CR-T datasheet, ISL6561CR-T pinout, ISL6561CR-T application, or ISL6561CR-T equivalent, key selection considerations include its 40-pin QFN package, programmable temperature compensation for droop stability, Dynamic VID™ compatibility, 6-bit VID input (0.8375V–1.600V), and integrated shunt regulator supporting both 5V and 12V biasing.
Technical Context
The ISL6561CR-T implements interleaved multi-phase control using a master clock derived from the FS pin resistor, with phase spacing of 90° (4-phase), 120° (3-phase), or 180° (2-phase). Its error amplifier features 80dB open-loop gain and 18MHz bandwidth, paired with a 1.5V sawtooth ramp generator for PWM timing.
Current sensing operates during forced off-time (≥1/3 switching period), sampling ISEN+/- differential inputs per active channel to generate cycle-averaged current signals used for droop programming, channel balancing, and overcurrent protection at 98–127μA trip thresholds across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Support | Configurable 2-, 3-, or 4-phase operation via PWM3/PWM4 pin strapping |
| VID Range | 0.8375V to 1.600V in 12.5mV steps; 6-bit Dynamic VID™ compatible |
| System Accuracy | ±0.5% over life, load, line, and temperature (0°C to 85°C, VID = 1.2V–1.6V) |
| Ripple Frequency | >4MHz effective output ripple frequency with 4-phase interleaving |
| Current Sensing | Differential rDS(ON) or DCR sensing with programmable temperature compensation |
| Supply Options | 5V direct or 12V via internal shunt regulator (6.02V clamp, ≤25mA sink) |
| Operating Temp | 0°C to +70°C ambient (ISL6561CR grade) |
| OVP Threshold | 200mV above VID after soft-start; latched OVP pin drives external crowbar |
Pinout & Package
ISL6561CR-T is housed in a RoHS-compliant 40-pin QFN package (6mm × 6mm, JEDEC MO-220 QFN outline, exposed thermal pad), optimized for high-density PCB layouts and thermal performance (θJA = 32°C/W, θJC = 3.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 5V direct or 12V via 300Ω limiting resistor; internal shunt regulates to 6.02V max |
| EN / ENLL | Enable control inputs | EN: threshold-sensitive (1.24V rising); ENLL: logic-level enable (QFN only); both clear faults and initiate soft-start |
| PWM1–PWM4 | Phase drive outputs | Open-drain PWM signals; phase count set by strapping PWM3/PWM4 to VCC (2/3/4-phase) |
| ISEN1+ to ISEN4- | Differential current sense inputs | Per-channel inputs for rDS(ON) (source-to-phase) or DCR (RC network) sensing; inactive channels left open |
| VDIFF / VSEN / RGND | Remote voltage sensing interface | VSEN/RGND form differential pair; VDIFF is single-ended output feeding FB/COMP for precise load regulation |
| TCOMP | Temperature compensation scaling | Resistor-to-ground sets transconductance (1μA/V/°C typical) to nullify rDS(ON)/DCR thermal drift |
| OFS | Reference offset programming | External resistor to GND or VCC generates 485–515mV or 2.91–3.09V offset at REF for load-line tuning |
| IDROOP | Average current output | Sourced average channel current proportional to load; connected to FB to establish droop slope |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Eliminates ground potential differences between controller and CPU VRM, improving regulation accuracy and OVP/UVLO thresholds |
| Programmable temperature compensation | Nullifies rDS(ON) or DCR drift over temperature using internal thermal sensor and TCOMP pin scaling |
| Dynamic VID™ technology | Enables seamless on-the-fly voltage changes without output disruption during CPU state transitions |
| Integrated shunt regulator | Allows direct 12V biasing with only a 300Ω series resistor-no external LDO required |
| Multi-phase channel balancing | Real-time averaging of sampled per-channel currents ensures equal current sharing across active phases |
| No-additional-component OVP | OVP pin directly drives external SCR/MOSFET crowbar; no external comparator or reference needed |
Applications
| Server CPU Power Delivery | Workstation GPU Core Regulation |
|---|---|
Use Scenario: High-current, low-voltage core supply for dual-socket Xeon or EPYC processors requiring tight droop control and fast load-step response. IC Role / Device Role / Timing Role: Primary multi-phase PWM controller managing four synchronous buck stages with rDS(ON) current sensing and Dynamic VID™ updates. Use Value: Achieves >4MHz effective ripple frequency and ±0.5% system accuracy, reducing output capacitance by ~40% versus single-phase designs while maintaining VR10.x compliance. |
Use Scenario: Precision core voltage regulation for high-end discrete GPUs (e.g., NVIDIA A100, AMD MI250X) with aggressive transient demands and thermal-aware droop. IC Role / Device Role / Timing Role: 4-phase VR controller implementing DCR current sensing with TCOMP-based thermal compensation to stabilize load line across die temperature gradients. Use Value: Enables accurate current-balanced operation across all phases under 50A+ loads, minimizing per-phase thermal stress and extending MOSFET lifetime. |
| High-Performance Desktop VRM | AI Accelerator Board Power |
Use Scenario: Enthusiast-grade motherboard VRM delivering stable 1.35V @ 40A+ to Intel Core i9 or AMD Ryzen 9 CPUs during sustained AVX workloads. IC Role / Device Role / Timing Role: Configured as 4-phase controller with external NTC thermistor and OFS-adjusted droop for adaptive voltage positioning. Use Value: Delivers sub-10mV load-step deviation (<100ns edge rate) and eliminates need for external current-sense resistors-reducing BOM cost and board area. |
Use Scenario: Core power for FPGA-based AI inference accelerators with dynamic voltage scaling requirements and strict thermal management constraints. IC Role / Device Role / Timing Role: Multi-phase controller operating in 3-phase mode with VID12.5-enabled extended range and PGOOD-synchronized system boot sequencing. Use Value: Supports seamless voltage transitions during model-switching events via Dynamic VID™, while PGOOD coordination ensures deterministic firmware initialization timing. |
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 |
|---|---|---|---|
| ISL6562CR-T | Same pinout and feature set; enhanced OVP latch reset behavior and tighter VID accuracy (±0.3% typical) | Preferred for new designs requiring higher long-term voltage stability and improved fault recovery robustness | Select ISL6562CR-T when upgrading for improved system reliability in mission-critical server platforms |
| RT8803AGQW | 4-phase controller with integrated MOSFET drivers; lacks DCR sensing and programmable TCOMP; uses external VID DAC | Better suited for space-constrained designs where driver integration reduces component count but sacrifices thermal-compensated droop precision | Choose RT8803AGQW only if board area is primary constraint and rDS(ON) drift compensation is not required |
Compared with ISL6561CR-T, ISL6562CR-T offers tighter VID accuracy and more deterministic OVP recovery, while RT8803AGQW trades off sensing flexibility and thermal compensation for driver integration-making ISL6561CR-T optimal for thermally demanding, high-accuracy VR10.x implementations.
Availability
ISL6561CR-T is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU regulation, high-performance desktop VRMs, and AI accelerator board power requiring stable component supply and long-lifecycle support.
Supply support for ISL6561CR-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 support for its high-performance analog and power management portfolio, including VR10.x-compliant controllers.
The ISL6561CR-T belongs to Renesas' VR10.x multi-phase PWM controller family, designed specifically for precision core voltage regulation in high-current microprocessor and GPU applications with stringent transient and thermal requirements.
FAQ
What is the operating temperature range for the ISL6561CR-T?
The ISL6561CR-T is rated for 0°C to +70°C ambient operation, corresponding to the "CR" grade designation in the Intersil/Renesas ordering nomenclature. This distinguishes it from the wider-range "IR" grade (-40°C to +85°C) and confirms suitability for commercial-server and high-end desktop environments where ambient thermal management is controlled.
How does the ISL6561CR-T implement temperature compensation for rDS(ON) drift?
The ISL6561CR-T uses an internal thermal sensor and the TCOMP pin to scale compensation current (10–20μA at 40°C) into the current-sense path. A resistor from TCOMP to ground sets transconductance (1μA/V/°C typical), allowing precise nullification of rDS(ON) or DCR resistance increase with temperature-critical for maintaining droop accuracy across CPU thermal cycles.
Can the ISL6561CR-T operate with only two active phases?
Yes-the ISL6561CR-T supports 2-, 3-, or 4-phase operation. To configure for 2-phase mode, tie the PWM3 pin to VCC; PWM4 remains floating or grounded. This disables channels 3 and 4, routing current-sense and PWM drive exclusively to PWM1 and PWM2 with corresponding ISEN1+/− and ISEN2+/− pairs.
What is the purpose of the IDROOP pin on the ISL6561CR-T?
The IDROOP pin outputs the averaged sensed current across all active channels, proportional to total load current. In droop-regulated designs, IDROOP is connected to the FB pin through a resistor to generate a voltage drop that offsets the feedback node-establishing the desired load-line slope without external op-amps or current mirrors.
Does the ISL6561CR-T require external components for overvoltage protection?
No-the ISL6561CR-T provides fully integrated overvoltage protection with no external components required. Its OVP pin asserts a latched high signal (capable of sinking ≥100mA) that directly drives an external SCR or MOSFET crowbar circuit. The trip threshold is fixed at 200mV above VID after soft-start, ensuring immediate response to catastrophic rail excursions.
ISL6561CR-T 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)
ISL6561CR-T FAQ
1.How can I place an order for ISL6561CR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6561CR-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 ISL6561CR-T reliable?
The price and inventory of ISL6561CR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561CR-T is usually 5 days.
3.What payment methods are accepted for ISL6561CR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561CR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6561CR-T?
ISL6561CR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6561CR-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 ISL6561CR-T?
For technical support, including ISL6561CR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561CR-T requirements.
6.How does Aetrix verify that ISL6561CR-T is sourced from the original manufacturer or authorized distributors?
All ISL6561CR-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 ISL6561CR-T meets industry standards.
7.What is the process for return or replacement of ISL6561CR-T?
All ISL6561CR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561CR-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 ISL6561CR-T part is unused and in its original packaging.
Return procedure for ISL6561CR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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