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Renesas ISL95866IRZ-T
- Part No.:
- ISL95866IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 52-VFQFN Exposed Pad
- Datasheet:
-
ISL95866IRZ-T.pdf
- Description:
- IC PWM CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:4,696
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Product details
Overview
ISL95866IRZ-T from Renesas (formerly Intersil) is a dual-output, multiphase PWM controller IC compliant with Intel IMVP8™ for desktop CPU core (IA) and graphics (GT/GTUS) power delivery. It supports 4+3 phase configuration, integrated +12V gate drivers (two for VR A, one for VR B), SMBus/SVID interface, and R3™ modulator technology enabling diode emulation mode and adaptive body diode conduction time reduction.
For engineers reviewing the ISL95866IRZ-T datasheet, ISL95866IRZ-T pinout, ISL95866IRZ-T application, or ISL95866IRZ-T equivalent, key selection criteria include IMVP8 compliance, dual-VR programmability, DCR/resistor current sensing support, remote voltage sensing, and SMBus-configurable droop/OVP/OCP enablement.
Technical Context
The ISL95866IRZ-T implements two independent voltage regulator controllers: VR A configurable for 1–4 phases with two integrated +12V gate drivers, and VR B configurable for 1–3 phases with one +12V gate driver. Both outputs share a common SMBus interface supporting SVID conflict-free communication with Intel CPUs.
Its R3™ modulator enables variable switching frequency during load transients, phase shedding per power state (PS0/PS1/PS2), and diode emulation in single-phase operation to improve light-load efficiency. Current sensing supports lossless DCR with single NTC thermistor compensation or precision resistor-based sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Compliance | Intel IMVP8™ specification - ensures interoperability with desktop IA/GT/GTUS processors |
| Output Configuration | Dual VR: VR A (1–4 phase), VR B (1–3 phase) - enables flexible partitioning of CPU core and graphics rail power stages |
| Gate Drivers | Three integrated +12V drivers (2 on VR A, 1 on VR B) - eliminates need for external high-side drivers in typical 4+3 designs |
| Current Sensing | DCR sensing with NTC compensation or resistor sensing - supports accurate, temperature-compensated current monitoring without shunt losses |
| Voltage Accuracy | ±0.5% system accuracy over temperature - meets tight IMVP8 output regulation requirements across operating range |
| SMBus Interface | SVID-compatible with droop/OVP/OCP enable/disable and voltage offset adjustment - enables dynamic CPU-driven power policy control |
| Remote Sensing | Differential remote voltage sense on both outputs - compensates for PCB IR drop to maintain load-point regulation accuracy |
Pinout & Package
ISL95866IRZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95866 datasheet (FN8821), including dedicated SVID bus pins (SCLK, SDATA), VR_A/VR_B phase control outputs, gate drive outputs (HG_A1/HG_A2/LG_A1/LG_A2/HG_B1/LG_B1), current sense inputs (CSA+, CSA−, CSB+, CSB−), remote sense inputs (VSNS_A+, VSNS_A−, VSNS_B+, VSNS_B−), and SMBus address select pins (ADDR0–ADDR2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK, SDATA | SMBus clock/data I/O | Enable bidirectional SVID communication with CPU for voltage setting, protection control, and telemetry |
| HG_A1, HG_A2, LG_A1, LG_A2 | VR A high/low-side gate drive outputs | Directly drive external MOSFETs in up to 4-phase VR A topology; integrated +12V drivers reduce external component count |
| HG_B1, LG_B1 | VR B high/low-side gate drive outputs | Drive external MOSFETs in up to 3-phase VR B; single +12V driver optimized for graphics rail scalability |
| CSA+, CSA−, CSB+, CSB− | Current sense differential inputs | Accept DCR voltage drop or resistor-based current signals; support NTC compensation for VR A/B independently |
| VSNS_A+, VSNS_A−, VSNS_B+, VSNS_B− | Remote voltage sense inputs | Enable Kelvin connection to CPU/GPU VDD/VDDIO pads for precise load-point regulation |
| ADDR0–ADDR2 | SVID address select inputs | Resistor-programmable 3-bit address allows coexistence of multiple ISL95866IRZ-T controllers on same SMBus |
Key Features
| Feature | Design Value |
|---|---|
| R3™ modulator architecture | Delivers faster transient settling and variable-frequency response to load steps - critical for IMVP8 PS-state transitions |
| Diode emulation mode | Enables discontinuous conduction in single-phase operation - improves light-load efficiency without adding complexity |
| Adaptive body diode conduction time reduction | Minimizes reverse recovery losses in synchronous rectifiers - increases efficiency at medium-to-high loads |
| Programmable IMAX per VR | Allows independent current limit setting for core and graphics rails - supports asymmetric power delivery requirements |
| Single VR_READY signal | Combines power-good status for both VRs into one output - simplifies motherboard sequencing logic |
Applications
| Desktop CPU Core Power Delivery | Discrete GPU Graphics Rail |
|---|---|
Use Scenario: Powering Intel 4th–7th Gen desktop CPUs (e.g., Core i5/i7) requiring IMVP8-compliant core voltage (VCCIN) regulation. IC Role / Device Role / Timing Role: Dual-output PWM controller managing 4-phase VR A for IA core and 3-phase VR B for GT/GTUS graphics domains. Use Value: Enables single-chip solution for split-rail CPU power with coordinated SMBus control, reducing board area vs. dual-controller designs. | Use Scenario: Delivering stable, high-current voltage to discrete GPUs (e.g., NVIDIA GTX series) on ATX motherboards with IMVP8 support. IC Role / Device Role / Timing Role: VR B operates as dedicated 3-phase graphics regulator with remote sensing and SVID-adjustable offset for GPU VDDQ/VDDCI rails. Use Value: Supports dynamic GPU voltage scaling via SMBus commands while maintaining ±0.5% accuracy under load transients. |
| High-Performance Gaming Motherboard | IMVP8-Compliant All-in-One Desktop |
Use Scenario: High-density ATX boards targeting overclocked desktop platforms requiring robust phase shedding and thermal-aware current sensing. IC Role / Device Role / Timing Role: ISL95866IRZ-T executes PS0/PS1/PS2 state transitions with phase shedding and DCR-based current monitoring using NTC compensation. Use Value: Maintains regulation stability during rapid CPU load changes (e.g., gaming workloads) while optimizing efficiency across 0–100A range. | Use Scenario: Space-constrained all-in-one PCs where motherboard real estate is limited and dual-rail integration is mandatory. IC Role / Device Role / Timing Role: Single ISL95866IRZ-T replaces separate core and graphics controllers, sharing SMBus lines and VR_READY signal. Use Value: Reduces BOM count by ≥3 ICs and associated passives, lowering cost and improving layout yield without sacrificing IMVP8 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output IMVP8 multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95865IRZ-T | Single-output 4-phase controller (VR A only); no VR B channel or second gate driver | Supports core-only IMVP8 designs; cannot power GT/GTUS rails concurrently | Select when graphics rail is handled by discrete VR or integrated GPU with lower current demand |
| RT8803AGQW | Dual-output IMVP8 controller with 3+2 phase capability; lacks integrated +12V gate drivers - requires external drivers | Higher external component count; supports similar split-rail topologies but with less integration | Choose when design prioritizes vendor diversification or requires specific RT series feature set (e.g., different SMBus command set) |
Compared with ISL95866IRZ-T, ISL95865IRZ-T omits VR B functionality entirely, limiting use to core-only systems, while RT8803AGQW retains dual-VR capability but increases layout complexity and BOM cost due to external gate drivers - making ISL95866IRZ-T optimal for integrated, space-constrained IMVP8 desktop power designs.
Availability
ISL95866IRZ-T is available at Aetrix Electronics and suitable for high-performance desktop motherboards, gaming platforms, and IMVP8-compliant all-in-one PCs requiring stable component supply, long-term lifecycle support, and verified IMVP8 timing compliance.
Supply support for ISL95866IRZ-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 Corporation acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio. Intersil was known for robust power delivery ICs targeting computing and industrial applications.
The ISL95866IRZ-T belongs to Renesas' IMVP8-compliant multiphase controller product line, designed specifically to meet Intel's stringent desktop CPU power delivery requirements for core, graphics, and unsliced graphics domains.
FAQ
What is the primary function of the ISL95866IRZ-T in an IMVP8 desktop platform?
The ISL95866IRZ-T serves as a dual-output multiphase PWM controller that manages power delivery to both the CPU core (VR A, up to 4-phase) and graphics domain (VR B, up to 3-phase) in compliance with Intel IMVP8™ specifications. It integrates gate drivers, SMBus/SVID interface, and R3™ modulation to coordinate voltage regulation, transient response, and protection across both rails using a single IC.
Does the ISL95866IRZ-T support both DCR and resistor-based current sensing?
Yes, the ISL95866IRZ-T supports both lossless inductor DCR current sensing - with optional single NTC thermistor for temperature compensation - and precision resistor-based current sensing. This flexibility allows designers to optimize for cost (DCR) or accuracy (resistor) depending on the target platform's performance and thermal requirements.
How does the SMBus interface of the ISL95866IRZ-T differ from standard I²C?
The ISL95866IRZ-T implements an SVID-compliant SMBus interface, not generic I²C. It supports Intel-specific commands for voltage offset adjustment, droop enable/disable, and OVP/OCP protection control - all with conflict-free addressing via ADDR0–ADDR2 pins. Unlike basic I²C, SVID ensures deterministic timing and protocol alignment with IMVP8 CPU power management states.
What package type and thermal characteristics does the ISL95866IRZ-T use?
The ISL95866IRZ-T is packaged in a 48-pin QFN (7mm × 7mm, 0.5mm pitch) with an exposed thermal pad. Its thermal design supports junction-to-board and junction-to-case paths optimized for high-power desktop VR applications, and the datasheet specifies θJA = 30°C/W under standard JEDEC 2-layer board conditions.
Can the ISL95866IRZ-T be used in non-Intel platforms such as AMD or ARM-based systems?
The ISL95866IRZ-T is specifically architected for Intel IMVP8™ compliance, including SVID protocol, PS-state timing, and VR_READY signaling. While its PWM and gate drive functions are technically usable elsewhere, lack of native support for AMD SVI2 or ARM-specific power management protocols makes it unsuitable for non-Intel desktop platforms without extensive firmware and hardware adaptation.
ISL95866IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- IMVP8™ Compliant Desktops
- Voltage - Input:
- 9V ~ 20V
- Number of Outputs:
- 2
- Voltage - Output:
- 0V ~ 1.52V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (6x6)
ISL95866IRZ-T FAQ
1.How can I place an order for ISL95866IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95866IRZ-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 ISL95866IRZ-T reliable?
The price and inventory of ISL95866IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95866IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95866IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95866IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95866IRZ-T?
ISL95866IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95866IRZ-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 ISL95866IRZ-T?
For technical support, including ISL95866IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95866IRZ-T requirements.
6.How does Aetrix verify that ISL95866IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95866IRZ-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 ISL95866IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95866IRZ-T?
All ISL95866IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95866IRZ-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 ISL95866IRZ-T part is unused and in its original packaging.
Return procedure for ISL95866IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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