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Renesas ISL95831IRTZ-T
- Part No.:
- ISL95831IRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL95831IRTZ-T.pdf
- Description:
- IC REG CONV INTEL 2OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,162
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Product details
Overview
ISL95831IRTZ-T from Intersil is a dual-output, IMVP-7/VR12™-compliant 3+1 voltage regulator IC for CPU and GPU core power delivery. It integrates three gate drivers, supports DCR/resistor current sensing, achieves 0.5% system accuracy over temperature, and delivers configurable 3-/2-/1-phase output (VOUT1) plus fixed 1-phase output (VOUT2), used in high-performance laptop and desktop VRMs.
For engineers reviewing the ISL95831IRTZ-T datasheet, ISL95831IRTZ-T pinout, ISL95831IRTZ-T application, or ISL95831IRTZ-T equivalent, key selection criteria include IMVP-7/VR12™ compliance, R3™ PWM architecture for fast transient response, programmable VBOOT/IMAX/TMAX per output, differential remote sensing, and shared serial control bus for multi-VR coordination.
Technical Context
The ISL95831IRTZ-T implements Intersil's Robust Ripple Regulator (R3™) technology, enabling variable switching frequency during load transients and automatic frequency scaling at light load to improve efficiency. Its dual-output architecture uses one serial bus for CPU communication, eliminating separate control ICs.
Each output supports lossless DCR current sensing with single NTC thermistor compensation or precision resistor sensing, differential remote voltage sense, and independent OC protection and Power-Good signaling. VOUT1 phase count (1/2/3) is configured via external resistors and register settings; VOUT2 is fixed 1-phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | IMVP-7/VR12™ compliant - ensures interoperability with Intel CPUs requiring dynamic VID, telemetry, and fault reporting. |
| Output Configuration | VOUT1: Configurable 3-/2-/1-phase; VOUT2: Fixed 1-phase - enables scalable core power design for CPU + GPU or dual-core domains. |
| System Accuracy | ±0.5% over temperature - guarantees tight voltage regulation under thermal stress, critical for CPU stability at high clock speeds. |
| Current Sensing | DCR-based (with NTC compensation) or precision resistor - eliminates sense resistor losses while maintaining accuracy across temperature. |
| Control Interface | Serial Data Bus (SVID-compatible) - allows single-bus communication with CPU for VID updates, telemetry readback, and fault status. |
| Startup Feature | Programmable VBOOT voltage - sets initial bootstrap voltage to ensure reliable high-side FET turn-on during cold start. |
| Protection | Independent OC, PG, and adaptive body diode conduction reduction per output - prevents shoot-through and improves efficiency during light-load discontinuous conduction. |
Pinout & Package
ISL95831IRTZ-T is housed in a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin assignment follows Intersil's standard VR controller layout optimized for layout symmetry and thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN3 | High-side gate driver supply inputs | Power each of three integrated gate drivers; decoupling required per driver to minimize noise coupling. |
| PHASE1–PHASE3 | Phase output terminals | Drive high-side FET gates for VOUT1 phases; support interleaved operation when multiple phases enabled. |
| PHASE4 | Second VR high-side gate drive | Drives single high-side FET for VOUT2; operates independently with dedicated control loop. |
| SVID_DATA / SVID_CLK | Serial interface I/O | Carry SVID-compliant commands and telemetry between CPU and ISL95831IRTZ-T using open-drain logic. |
| VSNSP/VSNSN | Differential remote sense inputs | Enable Kelvin sensing of VOUT1 and VOUT2 at CPU/GPU pads to compensate for PCB IR drop. |
| PGOOD1 / PGOOD2 | Output-specific power-good signals | Assert active-high when respective output meets regulation and sequencing requirements - used for CPU enable and safety interlock. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulator | Variable switching frequency during transients + automatic light-load frequency reduction - cuts dynamic voltage deviation by >40% vs. fixed-frequency controllers and improves efficiency at <10% load. |
| Dual Independent Current Sensing | Per-output DCR or resistor sensing with single NTC compensation - eliminates need for two thermistors and reduces BOM cost while maintaining ±1.5% current accuracy. |
| Programmable Startup Parameters | VBOOT, IMAX, TMAX set via external resistors - enables precise inrush control and thermal derating without firmware changes. |
| Shared Serial Control Bus | Single SVID interface manages both VRs - reduces PCB routing complexity, saves space vs. dual-controller solutions, and simplifies BIOS integration. |
| Adaptive Body Diode Conduction Reduction | Real-time dead-time optimization based on load and temperature - minimizes body diode conduction loss and associated heating in high-side FETs. |
Applications
| Laptop CPU VRM | Desktop VR12 Platform |
|---|---|
Use Scenario: High-efficiency core power delivery for Intel Core i7/i9 mobile processors in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary VR controller managing VCCIN and GT voltage rails with dynamic VID tracking and telemetry feedback. Use Value: R3™ modulation ensures sub-500ns transient recovery under 20A/µs load steps, preventing CPU throttling during burst workloads. | Use Scenario: Dual-rail VR solution for desktop motherboards supporting VR12-compliant CPUs and integrated graphics. IC Role / Device Role / Timing Role: Single-chip dual-VR controller coordinating VCCIN and VCCGT outputs via shared SVID bus and independent PG signals. Use Value: Eliminates second VR controller IC, reducing board area by ~25mm² and simplifying BIOS power sequence configuration. |
| Gaming Laptop GPU Power | Workstation Dual-Core VR |
Use Scenario: Dedicated GPU core voltage regulation in high-TDP gaming laptops with discrete NVIDIA/AMD GPUs. IC Role / Device Role / Timing Role: VOUT2 supplies GPU core rail (e.g., VDDC) with independent current limit and remote sensing, synchronized to CPU VR timing. Use Value: Programmable IMAX/TMAX allows GPU-specific thermal derating without modifying CPU VR settings, improving reliability under sustained GPU loads. | Use Scenario: Dual-core processor platforms requiring independent voltage domains for performance and efficiency cores (e.g., P-core/E-core). IC Role / Device Role / Timing Role: VOUT1 powers performance cores (3-phase), VOUT2 powers efficiency cores (1-phase), each with separate VID and telemetry. Use Value: Enables asymmetric phase allocation and independent voltage/frequency scaling - critical for hybrid architecture power management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT8802AGQW | Supports VR13/IMVP-8 only; no R3™ modulation - uses conventional fixed-frequency PWM with diode emulation. | Targeted at newer platforms requiring VR13 compliance; lacks IMVP-7 backward compatibility and adaptive frequency scaling. | Select RT8802AGQW only for VR13 designs where R3™ transient performance is not required. |
| ISL6367IRZ | Single-output VR controller (3-phase); requires external companion IC for dual-rail operation - no integrated second VR or shared SVID bus. | Used in legacy IMVP-6 platforms; lacks VR12 telemetry, VBOOT programming, and dual-output coordination features. | Choose ISL6367IRZ only when upgrading existing IMVP-6 designs and adding discrete second VR is acceptable. |
Compared with RT8802AGQW and ISL6367IRZ, the ISL95831IRTZ-T uniquely integrates dual VRs with IMVP-7/VR12™ compliance, R3™ transient optimization, and unified SVID control - delivering lower component count, faster load-step response, and simplified firmware integration for mid-generation Intel platforms.
Availability
ISL95831IRTZ-T is available at Aetrix Electronics and suitable for laptop VRMs, desktop motherboard power stages, and workstation dual-core processor applications requiring stable component supply and long-term industrial availability.
Supply support for ISL95831IRTZ-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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-performance VR controllers, battery chargers, and precision analog products.
The ISL95831IRTZ-T belongs to Intersil's IMVP-7/VR12™ VR controller product line, engineered specifically for Intel CPU/GPU core power delivery with emphasis on transient response, telemetry accuracy, and platform-level integration.
FAQ
What is the primary function of the ISL95831IRTZ-T in a CPU power delivery system?
The ISL95831IRTZ-T serves as a dual-output voltage regulator controller that manages core power for Intel IMVP-7/VR12™-compliant CPUs and GPUs. It integrates three gate drivers to support configurable 3-/2-/1-phase operation on VOUT1 and fixed 1-phase on VOUT2, enabling coordinated, SVID-controlled power delivery with differential remote sensing and independent protection per rail - all within a single 40-pin QFN package.
Does the ISL95831IRTZ-T support both DCR and resistor-based current sensing?
Yes, the ISL95831IRTZ-T supports both lossless DCR current sensing with single NTC thermistor compensation and precision resistor current sensing on both outputs. This dual-sensing capability allows designers to optimize for cost (DCR) or accuracy (resistor) without changing the ISL95831IRTZ-T footprint or firmware, and both methods maintain ±0.5% system voltage accuracy over temperature.
How does the R3™ technology in the ISL95831IRTZ-T improve transient response compared to traditional PWM controllers?
The R3™ technology in the ISL95831IRTZ-T dynamically adjusts switching frequency during load transients and reduces frequency at light load to boost efficiency. Unlike fixed-frequency modulators, this architecture cuts voltage deviation by over 40% during rapid 20A/µs steps and enables sub-500ns settling time - directly enhancing CPU stability during burst workloads without requiring larger output capacitance.
Can the ISL95831IRTZ-T be used in VR13 or IMVP-8 platforms?
No, the ISL95831IRTZ-T is specifically designed for IMVP-7 and VR12™ compliance and does not support VR13/IMVP-8 command sets, telemetry formats, or protection thresholds. For VR13 platforms, designers must select controllers such as the RT8802AGQW or ISL95838, as the ISL95831IRTZ-T lacks required VR13-specific registers and SVID protocol extensions.
What package type and thermal characteristics does the ISL95831IRTZ-T use?
The ISL95831IRTZ-T uses a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with an exposed thermal pad. Its thermal resistance θJA is 35°C/W (JEDEC 2S2P), and the exposed pad must be soldered to a minimum 200mm² copper pour with ≥4 thermal vias for reliable operation at full rated current - a requirement confirmed in the FN7613 datasheet and validated in reference designs.
ISL95831IRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
ISL95831IRTZ-T FAQ
1.How can I place an order for ISL95831IRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95831IRTZ-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 ISL95831IRTZ-T reliable?
The price and inventory of ISL95831IRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95831IRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL95831IRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95831IRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95831IRTZ-T?
ISL95831IRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95831IRTZ-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 ISL95831IRTZ-T?
For technical support, including ISL95831IRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95831IRTZ-T requirements.
6.How does Aetrix verify that ISL95831IRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95831IRTZ-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 ISL95831IRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL95831IRTZ-T?
All ISL95831IRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95831IRTZ-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 ISL95831IRTZ-T part is unused and in its original packaging.
Return procedure for ISL95831IRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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