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Renesas ISL95812IRZ-T
- Part No.:
- ISL95812IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95812IRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,304
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Product details
Overview
ISL95812IRZ-T from Renesas (formerly Intersil) is a multiphase PWM regulator IC designed for Intel VR12.5/VR12.6/VR12.6+ CPU core power delivery, supporting 1-, 2-, or 3-phase configurations with two integrated gate drivers and one external driver, ±0.5% system voltage accuracy over temperature, SVID serial interface, and R3™ adaptive modulation. It enables compact, high-efficiency VR solutions in space-constrained notebook and desktop motherboards.
For engineers reviewing the ISL95812IRZ-T datasheet, ISL95812IRZ-T pinout, ISL95812IRZ-T application, or ISL95812IRZ-T equivalent, key selection considerations include VR12.6+ compliance, DCR/resistor current sensing support, programmable ICCMAX and slew rate, remote differential voltage sensing, and R3™ transient response behavior under dynamic CPU load conditions.
Technical Context
The ISL95812IRZ-T implements Intersil's Robust Ripple Regulator (R3™) topology, enabling variable switching frequency during load transients and faster transient settling versus fixed-frequency PWM modulators. It uses SVID communication for dynamic voltage identification and supports both lossless DCR-based and precision resistor-based current sensing paths.
It integrates dual high-side gate drivers, requires an external low-side driver per phase, and provides programmable VBOOT, adjustable switching frequency (100–1000 kHz), and adaptive body diode conduction time reduction to minimize shoot-through losses during light-load operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | Fully compliant with Intel VR12.5, VR12.6, and VR12.6+ specifications for CPU core voltage control. |
| Phase Configuration | Configurable 1-, 2-, or 3-phase operation using two on-die gate drivers plus one external driver per phase. |
| Voltage Accuracy | ±0.5% system accuracy over full temperature range - ensures stable CPU core voltage under thermal stress. |
| Current Sensing | Supports both DCR-based (lossless, single NTC thermistor compensation) and precision shunt resistor methods. |
| SVID Interface | Serial Voltage Identification bus for bidirectional CPU-VR communication - enables dynamic VID updates and telemetry. |
| Switching Frequency | Resistor-programmable 100 kHz to 1000 kHz - balances efficiency, EMI, and component size in VR design. |
| Remote Sensing | Differential remote voltage sense inputs - eliminates PCB IR drop error for accurate load-point regulation. |
Pinout & Package
ISL95812IRZ-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 ISL95812 datasheet (FN8380 Rev 0.00).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V–24V input; powers internal circuitry and gate drivers. |
| VOUT_SENSE+, VOUT_SENSE− | Differential remote sense inputs | Enable precise load-point voltage regulation by rejecting PCB trace resistance error. |
| SVID_DATA, SVID_CLK | SVID serial interface | Carry bidirectional CPU-to-VR commands and telemetry (VID, temperature, current, status). |
| PHASE0–PHASE2 | Gate drive outputs | Two integrated high-side drivers (PHASE0, PHASE1); PHASE2 supports external driver connection for third phase. |
| ICCMAX | Current limit programming | Resistor-connected pin sets maximum output current threshold for OCP activation. |
| PGOOD | Power-good indicator | Open-drain output signals valid output voltage (±1% window) after soft-start completion. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Adaptive Modulation | Variable switching frequency during load transients improves transient response and light-load efficiency without external compensation. |
| Programmable Slew Rate | Resistor-adjustable voltage transition rate prevents excessive dI/dt-induced noise during VID steps. |
| DCR Temperature Compensation | Single NTC thermistor input enables accurate inductor DCR current sensing across −40°C to +125°C ambient. |
| VBOOT Programmability | Configurable bootstrap capacitor precharge voltage ensures reliable high-side FET turn-on at startup. |
| Adaptive Body Diode Conduction | Reduces low-side FET conduction time during light loads - minimizes reverse recovery losses and improves efficiency. |
Applications
| Notebook CPU Core VR | Desktop CPU Core VR |
|---|---|
Use Scenario: High-performance ultrabook motherboard requiring fast transient response and minimal board area for dual-core or quad-core mobile CPUs. IC Role / Device Role / Timing Role: Primary multiphase VR controller managing core voltage (0.5–1.5V) via SVID, coordinating up to three phases with integrated gate drivers. Use Value: R3™ modulation delivers <10 µs transient settling and >90% efficiency at 15A, enabling thinner chassis and longer battery runtime. | Use Scenario: ATX mid-tower gaming motherboard powering high-TDP desktop CPUs (e.g., Intel Core i7/i9) with aggressive load steps. IC Role / Device Role / Timing Role: VR12.6+-compliant PWM controller implementing 3-phase configuration with remote sensing and programmable ICCMAX for safe overclocking headroom. Use Value: ±0.5% voltage accuracy and differential sensing maintain stable Vcore under 50A load steps, preventing CPU throttling or instability. |
| VRM Module Integration | OEM Server Blade Power |
Use Scenario: Compact VRM module for embedded x86 SoC designs where layout space and thermal density are constrained. IC Role / Device Role / Timing Role: Configurable 2-phase controller with resistor current sensing and programmable VBOOT - simplifies module bring-up and reduces BOM count. Use Value: Single-chip integration of gate drivers and SVID interface eliminates need for discrete driver ICs, cutting module footprint by ~35%. | Use Scenario: Dual-CPU server blade requiring matched VR performance and telemetry reporting across multiple power rails. IC Role / Device Role / Timing Role: SVID-enabled VR controller feeding CPU core rail with PGOOD synchronization and current telemetry for BMC monitoring. Use Value: Integrated ICCMAX programming and remote sensing ensure consistent current limiting and voltage regulation across replicated VR sections, improving system-level reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95815IRZ-T | Same R3™ architecture and VR12.6+ compliance; adds integrated low-side drivers (no external driver required), higher max switching frequency (1.2 MHz). | Enables fully integrated 3-phase VR without external drivers - better suited for high-density, lower-component-count designs. | Select ISL95815IRZ-T when eliminating external gate drivers and maximizing phase count within same footprint is critical. |
| RT8803AZQW | VR12.5/12.6-compliant; uses conventional constant-on-time (COT) control instead of R3™; no integrated gate drivers - requires external high- and low-side drivers for all phases. | Targets cost-sensitive desktop boards where transient performance is secondary to BOM simplicity and legacy compatibility. | Choose RT8803AZQW only if existing layout supports full external driver implementation and R3™-level transient response is not required. |
Compared with ISL95812IRZ-T, ISL95815IRZ-T offers greater integration and higher frequency headroom but shares identical SVID protocol and sensing architecture, while RT8803AZQW trades transient performance and integration for broader driver flexibility and lower base cost in non-VR12.6+ systems.
Availability
ISL95812IRZ-T is available at Aetrix Electronics and suitable for notebook computers, desktop motherboards, and embedded x86 VRM modules requiring stable component supply, long-term lifecycle support, and VR12.6+ compliance.
Supply support for ISL95812IRZ-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) is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and computing markets.
The ISL95812IRZ-T belongs to Renesas' high-performance CPU power management product line, engineered specifically for Intel VR12.x-compliant core voltage regulation in client computing platforms with emphasis on transient fidelity and thermal efficiency.
FAQ
What CPU standards does the ISL95812IRZ-T support?
The ISL95812IRZ-T is fully compliant with Intel VR12.5, VR12.6, and VR12.6+ specifications. It implements the required SVID interface, load-line regulation, and protection features (OCP, UVP, OVP) mandated by those standards. This ensures interoperability with compatible Intel Core processors and proper dynamic voltage scaling behavior in certified systems.
Does the ISL95812IRZ-T include integrated gate drivers?
Yes, the ISL95812IRZ-T integrates two high-side gate drivers (PHASE0 and PHASE1). A third phase is supported via the PHASE2 output, which drives an external gate driver. This architecture allows flexible 1-, 2-, or 3-phase configurations while maintaining optimal thermal distribution and minimizing external component count compared to fully external driver solutions.
How does the ISL95812IRZ-T achieve high voltage accuracy?
The ISL95812IRZ-T achieves ±0.5% system voltage accuracy over temperature through precision internal reference trimming, differential remote voltage sensing (VOUT_SENSE+/−), and enhanced load-line calibration. These features collectively eliminate PCB IR drop errors and compensate for thermal drift in feedback components, ensuring stable CPU core voltage even under sustained high-current operation.
Can the ISL95812IRZ-T use inductor DCR for current sensing?
Yes, the ISL95812IRZ-T supports lossless DCR current sensing with automatic temperature compensation using a single NTC thermistor connected to the THERM pin. This method eliminates the power loss and board area associated with shunt resistors while maintaining accuracy across −40°C to +125°C, making it ideal for thermally constrained notebook VR designs.
What is the role of the R3™ technology in the ISL95812IRZ-T?
R3™ (Robust Ripple Regulator) technology in the ISL95812IRZ-T enables variable switching frequency during load transients, resulting in faster settling time (<10 µs) and improved light-load efficiency. Unlike fixed-frequency PWM, R3™ dynamically adjusts frequency based on ripple amplitude and load step magnitude - a key differentiator for CPU VR applications demanding rapid response to sudden current demands.
ISL95812IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR12.5, VR12.6, VR12.6+
- Voltage - Input:
- 4.5V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95812IRZ-T FAQ
1.How can I place an order for ISL95812IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95812IRZ-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 ISL95812IRZ-T reliable?
The price and inventory of ISL95812IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95812IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95812IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95812IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95812IRZ-T?
ISL95812IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95812IRZ-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 ISL95812IRZ-T?
For technical support, including ISL95812IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95812IRZ-T requirements.
6.How does Aetrix verify that ISL95812IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95812IRZ-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 ISL95812IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95812IRZ-T?
All ISL95812IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95812IRZ-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 ISL95812IRZ-T part is unused and in its original packaging.
Return procedure for ISL95812IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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