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Renesas ISL95812HRZ-T
- Part No.:
- ISL95812HRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95812HRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,109
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Product details
Overview
ISL95812HRZ-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. It delivers 0.5% system voltage accuracy over temperature, uses SVID serial interface, supports DCR/resistor current sensing, and features R3™ adaptive modulation for fast transient response and light-load efficiency.
For engineers reviewing the ISL95812HRZ-T datasheet, ISL95812HRZ-T pinout, ISL95812HRZ-T application, or ISL95812HRZ-T equivalent, key selection criteria include VR12.6+ compliance, programmable ICCMAX and slew rate, differential remote sense capability, VBOOT startup control, and R3™ modulator behavior under dynamic load steps.
Technical Context
The ISL95812HRZ-T implements Intersil's Robust Ripple Regulator (R3™) technology, enabling variable switching frequency during load transients and automatic frequency scaling at light loads to improve efficiency. Its SVID interface handles bidirectional communication with Intel CPUs for VID code updates, telemetry reporting, and fault status.
It supports dual current-sensing methods-lossless DCR sensing with single NTC thermistor compensation or precision resistor-based sensing-and includes programmable parameters including VBOOT voltage, ICCMAX limit, voltage transition slew rate, and switching frequency via external resistors.
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 power delivery. |
| Phase Configuration | Configurable as 1-, 2-, or 3-phase VR using two integrated + one external gate drivers. |
| System Accuracy | ±0.5% output voltage accuracy over full temperature range, critical for stable CPU operation. |
| Current Sensing | Supports both DCR-based (with NTC compensation) and precision shunt resistor sensing methods. |
| Voltage Control | Differential remote sense input enables accurate load-point regulation despite PCB IR drop. |
| Modulation Technology | R3™ adaptive PWM with variable frequency during transients and automatic light-load frequency reduction. |
| Interface Protocol | SVID (Serial Voltage Identification) for real-time CPU-VR coordination and telemetry exchange. |
Pinout & Package
ISL95812HRZ-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 Rev 0.00 (March 2013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V–24V input for high-side FET drive and internal bias generation. |
| VOUT_SENSE+ | Remote sense positive | Connects to CPU VCC_CORE sense point for closed-loop load-line regulation. |
| VOUT_SENSE− | Remote sense negative | Completes differential sense path to reject common-mode noise and trace resistance error. |
| SVID_DATA / SVID_CLK | SVID bidirectional interface | Carries CPU commands (VID, ICCMAX, slew rate) and VR status (PGOOD, faults, telemetry). |
| PHASEx_OUT | Gate driver outputs | Three dedicated outputs (PHASE0–PHASE2) drive external high-side and low-side FETs per phase. |
| BOOTx | Bootstrap supply terminals | Each supports bootstrap capacitor for high-side gate drive in synchronous buck topology. |
| PGOOD | Power-good indicator | Open-drain output signals valid output voltage within ±5% tolerance after soft-start completion. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive R3™ Modulation | Enables faster transient settling and improved light-load efficiency via dynamic frequency adjustment without mode switching. |
| Programmable ICCMAX Limit | Resistor-set current limit prevents overcurrent damage while matching CPU thermal design power (TDP) envelope. |
| Adjustable Voltage Slew Rate | Configurable dV/dt during VID transitions avoids excessive inrush current and maintains stability across CPU state changes. |
| Dual Current Sensing Support | Allows cost-optimized DCR sensing or high-accuracy shunt-based sensing depending on board-level requirements. |
| VBOOT Programmability | Start-up boot voltage is set externally to ensure reliable high-side FET turn-on under varying input conditions. |
Applications
| Notebook CPU Power Delivery | Desktop CPU Power Delivery |
|---|---|
Use Scenario: High-performance ultrabook platform with Intel Core i7 processor requiring tight voltage regulation under rapid P-state transitions. IC Role / Device Role / Timing Role: Primary multiphase VR controller managing core voltage (VCC_CORE) with SVID coordination and load-line compliance. Use Value: R3™ modulation ensures sub-10µs transient recovery and ±0.5% accuracy preserves CPU stability during turbo boost events. | Use Scenario: ATX motherboard supporting VR12.6+ desktop CPUs with multi-GPU workloads and dynamic power management. IC Role / Device Role / Timing Role: Configurable 3-phase VR controller delivering scalable core power with remote sense and programmable slew rate. Use Value: Differential remote sensing compensates for >50mΩ PCB trace resistance, maintaining regulation accuracy at 150A peak load. |
| VR12.6+ Server Node | Embedded Computing Platform |
Use Scenario: Dual-socket server node with Intel Xeon E5 processors demanding VR12.6+ compliance and telemetry reporting. IC Role / Device Role / Timing Role: SVID-enabled VR controller providing real-time current/voltage telemetry and fault signaling to BMC. Use Value: Integrated SVID interface eliminates need for external PMBus translator, reducing BOM count and layout complexity. | Use Scenario: Fanless industrial PC with extended temperature operation and strict power sequencing requirements. IC Role / Device Role / Timing Role: 2-phase VR controller with programmable VBOOT and DCR temperature compensation for robust startup across −40°C to +85°C. Use Value: Single NTC thermistor enables accurate DCR compensation without additional ADC or calibration overhead. |
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 |
|---|---|---|---|
| ISL95815HRZ-T | Same pinout and feature set; adds support for VR13.0 and enhanced SVID command set including VRHot and VRAlert. | Required for newer Intel 10th/11th Gen CPUs with VR13.0 mandates; not backward-compatible with VR12.5-only systems. | Select ISL95815HRZ-T only when VR13.0 compliance or VRHot telemetry is required. |
| RT8803AZQW | 3-phase VR controller with SVID, but uses fixed-frequency COT architecture instead of R3™; no DCR temperature compensation support. | Suitable for cost-sensitive designs where light-load efficiency and advanced thermal compensation are secondary priorities. | Choose RT8803AZQW when simplified design and lower gate driver count outweigh need for R3™ transient performance. |
Compared with ISL95812HRZ-T, ISL95815HRZ-T extends VR standard support and telemetry depth, while RT8803AZQW trades adaptive modulation for simpler implementation-selection depends on target CPU generation, thermal accuracy needs, and transient response requirements.
Availability
ISL95812HRZ-T is available at Aetrix Electronics and suitable for notebook computers, desktop motherboards, and embedded computing platforms requiring stable component supply and long-term lifecycle support.
Supply support for ISL95812HRZ-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 continues to support its high-performance analog and power management portfolio.
The ISL95812HRZ-T belongs to Renesas' CPU voltage regulator controller product line, engineered specifically for Intel VR12.x-compliant microprocessor core power delivery in mobile and desktop platforms.
FAQ
What CPU generations does the ISL95812HRZ-T support?
The ISL95812HRZ-T supports Intel processors compliant with VR12.5, VR12.6, and VR12.6+ specifications-including Core i3/i5/i7/i9 2nd through 8th Generation mobile and desktop CPUs. It does not support VR13.0 or later standards. The ISL95812HRZ-T relies on SVID communication for VID updates and telemetry, making it incompatible with non-SVID CPUs such as AMD Ryzen or older Pentium models.
Does the ISL95812HRZ-T require external gate drivers?
The ISL95812HRZ-T integrates two gate drivers and supports one external driver, enabling flexible 1-, 2-, or 3-phase configurations. For 3-phase operation, an external driver (e.g., ISL6617A) must be used for the third phase. The ISL95812HRZ-T provides PHASEx_OUT signals and BOOTx terminals to interface directly with external drivers or discrete FETs without additional level-shifting circuitry.
How does the ISL95812HRZ-T implement DCR current sensing with temperature compensation?
The ISL95812HRZ-T measures inductor DCR voltage drop and applies real-time correction using a single NTC thermistor connected to the THERM pin. This compensates for copper resistance drift across temperature, achieving accurate current readback without shunt resistors. The ISL95812HRZ-T's internal circuitry scales the NTC signal to match DCR's thermal coefficient, eliminating need for external op-amps or calibration tables.
What is the purpose of the programmable VBOOT voltage in the ISL95812HRZ-T?
The ISL95812HRZ-T allows VBOOT-the bootstrap supply voltage for high-side FET gate drive-to be set externally via resistor divider. This ensures sufficient gate overdrive under low-input-voltage conditions (e.g., 5V rail), preventing shoot-through and improving efficiency during startup and low-VIN operation. The ISL95812HRZ-T monitors VBOOT and halts switching if undervoltage is detected, protecting power stages.
Can the ISL95812HRZ-T operate without SVID communication?
No-the ISL95812HRZ-T requires active SVID communication with the CPU to establish initial VID, update voltage during P-state transitions, and report telemetry. If SVID lines are unconnected or inactive, the ISL95812HRZ-T remains in reset and does not generate gate drive signals. The ISL95812HRZ-T has no default VID fallback mode or resistor-programmed static voltage option.
ISL95812HRZ-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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95812HRZ-T FAQ
1.How can I place an order for ISL95812HRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95812HRZ-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 ISL95812HRZ-T reliable?
The price and inventory of ISL95812HRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95812HRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95812HRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95812HRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95812HRZ-T?
ISL95812HRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95812HRZ-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 ISL95812HRZ-T?
For technical support, including ISL95812HRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95812HRZ-T requirements.
6.How does Aetrix verify that ISL95812HRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95812HRZ-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 ISL95812HRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95812HRZ-T?
All ISL95812HRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95812HRZ-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 ISL95812HRZ-T part is unused and in its original packaging.
Return procedure for ISL95812HRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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