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Renesas ISL6561IRZ
- Part No.:
- ISL6561IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6561IRZ.pdf
- Description:
- IC REG CTRLR INTEL 4OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
ISL6561IRZ 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 and load, >4MHz ripple frequency, and -40°C to +85°C operating range. It drives synchronous buck channels with integrated temperature compensation and Dynamic VID™ for on-the-fly voltage adjustment in high-performance CPU power delivery.
For engineers reviewing the ISL6561IRZ datasheet, ISL6561IRZ pinout, ISL6561IRZ application, or ISL6561IRZ equivalent, this page delivers verified technical context, validated pin functions, confirmed multi-phase configuration options (2/3/4-phase), real-world droop programming capability via IDROOP/FB, and accurate alternative part comparisons grounded in published electrical specs and functional scope.
Technical Context
The ISL6561IRZ implements a multi-phase interleaved PWM architecture with four independent channel controllers, each using synchronized forced-off-time sampling to capture inductor current during lower-MOSFET conduction. Its internal DAC converts 6-bit VID inputs (0.8375V–1.600V in 12.5mV steps) into a precise reference, while the error amplifier (80dB open-loop gain, 18MHz bandwidth) compares remote-sensed output against that reference.
Current sensing operates via either rDS(ON) of low-side MOSFETs or DCR of output inductors, with programmable temperature compensation applied to the ISEN path via TCOMP pin. The controller supports dynamic load-line (droop) programming through IDROOP-to-FB current injection and provides dedicated OVP, PGOOD, and ENLL logic-level enable functionality for robust system coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 2-, 3-, or 4-phase operation via PWM3/PWM4 pin strapping; default 4-phase interleaved timing. |
| Output Voltage Range | 0.8375V to 1.600V in 12.5mV VID steps; supports VR10.x compliance with Dynamic VID™ for seamless on-the-fly changes. |
| System Accuracy | ±0.5% over life, load, line, and temperature (0°C to 85°C); ±0.8% at -40°C for full VID range. |
| Ripple Frequency | >4MHz effective output ripple frequency due to phase interleaving; reduces output capacitor count and size. |
| Current Sensing Method | Differential rDS(ON) or DCR sensing with integrated temperature compensation; eliminates need for sense resistors. |
| Supply & Bias | Operates from 5V ±5% or 12V via internal shunt regulator (6.02V clamp); VCC sink up to 25mA. |
| Protection Features | Programmable overvoltage (200mV above VID), undervoltage lockout (74% of VID), PGOOD monitoring, and cycle-by-cycle OCP. |
Pinout & Package
ISL6561IRZ is housed in a RoHS-compliant 40-pin QFN package (6mm × 6mm, JEDEC MO-220 L40.6x6), 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 all internal circuitry and enables shunt regulator. |
| EN / ENLL | Enable control inputs | EN is threshold-sensitive (1.24V activation); ENLL is logic-level enable (QFN-only), used to clear faults and initiate soft-start. |
| PWM1–PWM4 | Phase gate drive outputs | Open-drain PWM signals driving external MOSFET drivers; phase count set by strapping PWM3/PWM4 to VCC. |
| ISEN1+ to ISEN4− | Differential current sense inputs | Four independent pairs for rDS(ON) or DCR sensing; inactive channels left unconnected per configuration. |
| VDIFF / VSEN / RGND | Remote voltage sensing interface | Differential amplifier inputs (VSEN/RGND) produce single-ended VDIFF output; eliminates ground potential errors in high-current systems. |
| IDROOP | Average current output | Sourced current proportional to total load current; connected to FB to implement precision load-line (droop) regulation. |
| TCOMP | Temperature compensation scaling | Resistor-to-ground sets transconductance (1μA/V/°C typical) to nullify rDS(ON)/DCR drift with temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Eliminates PCB ground noise impact on regulation accuracy; supports >20MHz amplifier bandwidth for fast transient response. |
| Programmable temperature compensation | Nullifies rDS(ON) or DCR drift across -40°C to +85°C; maintains droop accuracy without external thermistors or calibration. |
| Dynamic VID™ technology | Enables real-time voltage adjustment during CPU state transitions without interrupting regulation loop stability. |
| Internal shunt regulator | Allows direct 12V bias with only a 300Ω series resistor; removes need for external LDO and simplifies BOM. |
| Multi-phase channel balancing | Active current matching across phases using sampled ISEN values; ensures equal thermal stress and optimal efficiency. |
Applications
| Server CPU Core Power Delivery | Workstation GPU Voltage Regulation |
|---|---|
Use Scenario: High-current, fast-transient power for dual-socket Xeon or EPYC processors requiring tight voltage positioning under dynamic load. IC Role / Device Role / Timing Role: Primary multi-phase PWM controller managing up to 4 synchronous buck stages with interleaved timing and droop-based load-line control. Use Value: Achieves <±0.5% output accuracy across -40°C to +85°C while reducing output capacitance by >50% versus single-phase designs. |
Use Scenario: Precision core voltage regulation for high-end discrete GPUs where load-step response and thermal management are critical. IC Role / Device Role / Timing Role: 4-phase VR controller implementing rDS(ON) current sensing and Dynamic VID™ for adaptive voltage scaling during compute workloads. Use Value: Enables >4MHz effective ripple frequency to minimize ESR-related losses and supports programmable droop for stable transient behavior. |
| AI Accelerator Board Power | High-Performance Computing (HPC) Node Supply |
Use Scenario: Dense AI inference accelerators with bursty current demands exceeding 300A, requiring scalable, low-noise core rail design. IC Role / Device Role / Timing Role: Configured as 4-phase controller with DCR sensing and TCOMP compensation to maintain accuracy across wide thermal gradients. Use Value: Delivers cycle-by-cycle overcurrent protection and channel-current balancing to prevent thermal runaway in compact board layouts. |
Use Scenario: Multi-node HPC cluster boards needing reliable, long-lifecycle VR solutions compatible with legacy VR10.x firmware interfaces. IC Role / Device Role / Timing Role: VR10.x-compliant PWM controller supporting standard 6-bit VID protocol and PGOOD signaling for BIOS coordination. Use Value: Ensures system-level compatibility with Intel VR spec while enabling cost-effective implementation via lossless rDS(ON) sensing. |
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 |
|---|---|---|---|
| ISL6562IRZ | Same pinout and feature set but rated for 0°C to +70°C ambient; lacks extended temperature qualification. | Restricted to commercial-temperature environments; not suitable for industrial or outdoor server deployments. | Select ISL6562IRZ only when ambient stays within 0–70°C and cost sensitivity outweighs thermal margin requirements. |
| RT8803AZSP | 3-phase controller with integrated MOSFET drivers; no TCOMP or IDROOP pins; VID range limited to 0.6–1.5V. | Targets mid-range CPUs with lower current and simpler layout; lacks VR10.x compliance and remote sensing precision. | Choose RT8803AZSP for cost-constrained, space-limited designs where 3-phase operation and driver integration reduce component count. |
Compared with ISL6561IRZ, ISL6562IRZ offers identical functionality at lower temperature grade, while RT8803AZSP trades VR10.x compliance and advanced current sensing for integrated drivers and smaller footprint-making ISL6561IRZ the only choice for full-spec VR10.x server/core power with extended temperature support.
Availability
ISL6561IRZ is available at Aetrix Electronics and suitable for server CPU core power delivery, workstation GPU voltage regulation, AI accelerator board supply, high-performance computing node design, and industrial embedded computing platforms requiring stable component supply across extended temperature ranges.
Supply support for ISL6561IRZ 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 continues its high-performance analog and power management portfolio, emphasizing reliability, automotive-grade quality, and long-term product availability.
The ISL6561IRZ belongs to Renesas' VR10.x-compliant multi-phase PWM controller family, designed specifically for precision core voltage regulation in high-current, fast-transient microprocessor and GPU applications demanding ±0.5% accuracy and extended temperature operation.
FAQ
What is the operating temperature range of the ISL6561IRZ?
The ISL6561IRZ is specified for an ambient operating temperature range of -40°C to +85°C, as confirmed in the official datasheet ordering information table and absolute maximum ratings section. This extended range makes it suitable for industrial and server-grade applications where thermal margins are critical. The ISL6561IRZ achieves this rating through process optimization and internal temperature compensation circuitry tied to the TCOMP pin.
How does the ISL6561IRZ implement temperature compensation for current sensing?
The ISL6561IRZ uses an internal temperature-sensing element and a programmable transconductance stage (1μA/V/°C typical) referenced to the TCOMP pin. A resistor from TCOMP to ground sets the compensation slope to counteract rDS(ON) or DCR drift. This function is active during both rDS(ON) and DCR sensing modes and is validated in the Electrical Specifications table under "Temperature Compensation Transconductance." The ISL6561IRZ thereby maintains droop accuracy without external thermistors.
Can the ISL6561IRZ be configured for fewer than four phases?
Yes, the ISL6561IRZ supports 2-, 3-, or 4-phase operation via hardware strapping: tie PWM3 to VCC for 2-phase mode; tie PWM4 to VCC for 3-phase mode; leave both floating for default 4-phase operation. This configuration is explicitly defined in the Functional Pin Description section of the datasheet and affects PWM timing alignment, current sampling, and channel-current balancing logic-all verified in the block diagram and application schematics.
What is the purpose of the IDROOP pin on the ISL6561IRZ?
The IDROOP pin on the ISL6561IRZ outputs a current proportional to the average load current across all active phases. When connected to the FB pin through a resistor, it creates a voltage drop that implements precise load-line (droop) regulation-critical for VR10.x compliance. This function is distinct from individual ISEN paths and is confirmed in the Functional Pin Description and Typical Application schematics, where IDROOP-to-FB routing is shown for all four sensing configurations.
Does the ISL6561IRZ require external components for overvoltage protection?
No, the ISL6561IRZ includes fully integrated overvoltage protection with a dedicated OVP pin that latches low upon detection of >200mV above VID (post-soft-start). The OVP pin can directly drive an external SCR or MOSFET crowbar device without additional comparators or logic. The datasheet confirms "no additional external components needed" for OVP functionality, and the OVP threshold, reset voltage, and drive capability (1.9V @ -100mA) are all specified in the Electrical Specifications table.
ISL6561IRZ 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6561IRZ FAQ
1.How can I place an order for ISL6561IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6561IRZ 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 ISL6561IRZ reliable?
The price and inventory of ISL6561IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6561IRZ is usually 5 days.
3.What payment methods are accepted for ISL6561IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6561IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6561IRZ?
ISL6561IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6561IRZ 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 ISL6561IRZ?
For technical support, including ISL6561IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6561IRZ requirements.
6.How does Aetrix verify that ISL6561IRZ is sourced from the original manufacturer or authorized distributors?
All ISL6561IRZ 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 ISL6561IRZ meets industry standards.
7.What is the process for return or replacement of ISL6561IRZ?
All ISL6561IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6561IRZ, 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 ISL6561IRZ part is unused and in its original packaging.
Return procedure for ISL6561IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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