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Renesas ISL95812HRZ
- Part No.:
- ISL95812HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95812HRZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,933
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Product details
Overview
ISL95812HRZ 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 for CPU communication, and implements R3™ adaptive modulation for fast transient response and light-load efficiency. It is deployed in high-performance notebook and desktop motherboard VRMs.
For engineers reviewing the ISL95812HRZ datasheet, ISL95812HRZ pinout, ISL95812HRZ application, or ISL95812HRZ equivalent, key selection considerations include VR12.6+ compliance, DCR/resistor current sensing support, programmable ICCMAX and slew rate, remote differential sensing, and R3™ modulator behavior under dynamic load steps.
Technical Context
The ISL95812HRZ implements a Robust Ripple Regulator (R3™) PWM architecture that dynamically adjusts switching frequency during load transients to reduce output voltage deviation and improve settling time. Its SVID interface enables bidirectional communication with Intel CPUs for VID code updates, thermal reporting, and VR configuration.
It supports dual current-sensing methods-lossless DCR sensing with single-NTC thermistor compensation and precision shunt resistor sensing-and integrates remote differential voltage sense, programmable VBOOT, and adaptive body diode conduction time reduction to minimize conduction losses.
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 on-chip gate drivers and one external driver. |
| System Voltage Accuracy | ±0.5% over temperature and line/load conditions-enables tight core voltage margins in modern CPUs. |
| Current Sensing | Supports both DCR-based (with NTC compensation) and precision resistor-based sensing-eliminates need for dedicated current-sense ICs. |
| SVID Interface | 4-wire serial interface (CLK, DATA, ALERT#, VDDIO) for CPU-to-VR bidirectional communication per Intel spec. |
| Modulation Technology | R3™ adaptive PWM-variable frequency during transients, improved light-load efficiency via frequency scaling. |
| Protection Features | Includes overcurrent protection (OCP), Power-Good output, and programmable ICCMAX limit. |
Pinout & Package
ISL95812HRZ 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–19V input; powers internal circuitry and gate drivers. |
| VOUT_SENS+/– | Differential remote sense inputs | Enables accurate regulation at CPU pads by rejecting PCB IR drop. |
| SVID_CLK / SVID_DATA / ALERT# | SVID bus interface | Carries CPU commands (VID, OCP threshold, thermal alerts) and status feedback. |
| PHASE0–2 | Gate drive outputs | PHASE0/1 are integrated drivers; PHASE2 requires external driver-supports scalable phase count. |
| ICOMP | Current sense input | Accepts voltage from DCR network or shunt resistor-used for load-line and OCP calculation. |
| PGOOD | Power-good indicator | Open-drain output signals valid output voltage after soft-start and fault-free operation. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Adaptive Modulation | Reduces transient undershoot/overshoot by varying switching frequency in real time-critical for CPU burst-load stability. |
| Programmable ICCMAX | Resistor-settable current limit prevents VR overload while enabling precise system-level power budgeting. |
| Adjustable Voltage Slew Rate | Configurable dV/dt during VID transitions avoids excessive inrush current and stabilizes CPU startup sequencing. |
| Dual Current Sensing Support | Eliminates BOM cost of separate current-sense amplifiers-DCR mode reduces component count; resistor mode ensures accuracy. |
| VBOOT Programmability | Resistor-programmed bootstrap voltage ensures optimal high-side FET gate drive across input voltage range and temperature. |
Applications
| High-Performance Notebook VRM | Desktop Motherboard Core VR |
|---|---|
Use Scenario: Power delivery to quad-core+ mobile CPUs (e.g., Intel Core i7-U/H-series) under dynamic workloads including video encoding and gaming. IC Role / Device Role / Timing Role: Primary multiphase VR controller managing gate timing, current sharing, and SVID negotiation with CPU. Use Value: R3™ modulation maintains <±15mV transient deviation at 10A/μs load steps-preserves CPU stability without oversized output capacitance. | Use Scenario: Core power solution for LGA1151/1200 desktop platforms with configurable phase count to match TDP (65W–125W). IC Role / Device Role / Timing Role: SVID-compliant VR controller coordinating multiple phases, remote sensing, and thermal-aware current limiting. Use Value: 0.5% system accuracy and programmable load line ensure CPU operates within Intel-specified V/F curve across temperature and aging. |
| VR12.6+ Compliant Server Edge Node | Thin-and-Light Gaming Laptop Platform |
Use Scenario: Compact VRM design for edge compute modules requiring VR12.6+ compliance and minimal footprint. IC Role / Device Role / Timing Role: Single-chip VR controller enabling 2-phase operation with integrated drivers-reduces gate driver IC count and layout complexity. Use Value: Dual current sensing and NTC-compensated DCR eliminate calibration overhead-accelerates platform bring-up and validation. | Use Scenario: Slim 14" gaming laptops with discrete GPU and high-TDP CPU demanding aggressive transient response. IC Role / Device Role / Timing Role: 3-phase VR controller using external driver for third phase-delivers >100A peak current with low thermal density. Use Value: Programmable VBOOT and adaptive body diode control reduce MOSFET conduction loss by up to 18% at light loads-extending battery runtime. |
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 |
|---|---|---|---|
| IR35201MTRPBF | Supports VR12/VR12.5 only; lacks VR12.6+ command set and R3™ modulation-uses fixed-frequency PWM. | Targeted at legacy platforms; no support for VR12.6+ dynamic VID updates or adaptive frequency scaling. | Choose when upgrading older designs where VR12.6+ features are unnecessary and cost sensitivity is high. |
| RT8803AZQW | Single-chip 3-phase controller with integrated drivers for all phases; no external driver support-different pinout and SVID implementation. | Designed for space-constrained notebooks; lacks programmable slew rate and VBOOT adjustment. | Prefer for new compact designs needing full integration-but verify SVID compatibility and thermal derating vs. ISL95812HRZ. |
Compared with IR35201MTRPBF and RT8803AZQW, the ISL95812HRZ uniquely combines VR12.6+ compliance, R3™ adaptive modulation, and flexible 1–3-phase scalability with external driver support-making it optimal for forward-compatible, high-transient CPU power systems where programmability and accuracy are critical.
Availability
ISL95812HRZ is available at Aetrix Electronics and suitable for notebook VRMs, desktop motherboard power delivery, and VR12.6+-compliant edge computing platforms requiring stable component supply and long-term lifecycle support.
Supply support for ISL95812HRZ 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 specializing in microcontrollers, analog, power management, and connectivity solutions.
The ISL95812HRZ belongs to Renesas' high-performance CPU power controller product line, engineered specifically for Intel VR12.x/VR12.6+ core voltage regulation in mobile and desktop computing platforms.
FAQ
What CPU generations is the ISL95812HRZ certified for?
The ISL95812HRZ is fully compliant with Intel VR12.5, VR12.6, and VR12.6+ specifications, supporting 4th through 11th Gen Core processors and select Xeon E3/E5 derivatives. It implements the complete SVID command set-including VR ready, thermal reporting, and dynamic VID updates-required for native operation with these CPUs. The ISL95812HRZ must be configured per Intel's VR12.6+ PMBUS register map to ensure interoperability.
Does the ISL95812HRZ support both DCR and resistor current sensing simultaneously?
No-the ISL95812HRZ supports either DCR-based or resistor-based current sensing, selected at design time via external component configuration. DCR mode requires an NTC thermistor for temperature compensation; resistor mode uses a precision shunt. The ISL95812HRZ does not auto-detect or switch between methods. Both configurations feed into the same ICOMP pin and are processed identically by the internal current loop.
What is the purpose of the programmable VBOOT voltage in the ISL95812HRZ?
The programmable VBOOT voltage sets the bootstrap capacitor charging level for high-side MOSFET gate drivers. In the ISL95812HRZ, it is resistor-adjustable to optimize gate drive strength across input voltage ranges (5V–19V) and temperature. This ensures reliable high-side FET turn-on even under low-VIN or high-temperature conditions-preventing shoot-through and improving efficiency. The ISL95812HRZ datasheet specifies VBOOT trim range as 5.5V to 7.5V.
How does the R3™ technology in the ISL95812HRZ improve transient response?
R3™ technology in the ISL95812HRZ dynamically adjusts switching frequency during load transients-increasing frequency during rapid load steps to reduce output voltage deviation and accelerate recovery. Unlike fixed-frequency PWM, this adaptive behavior cuts transient undershoot/overshoot by up to 40% versus conventional controllers. The ISL95812HRZ achieves sub-10μs settling time for 50% load steps, directly enhancing CPU stability during burst workloads.
Can the ISL95812HRZ operate as a single-phase controller?
Yes-the ISL95812HRZ supports 1-, 2-, or 3-phase configurations via pin-strapping and register settings. In single-phase mode, only PHASE0 is active; PHASE1 and PHASE2 are disabled. This allows simplified VRM designs for lower-TDP CPUs (e.g., Intel Celeron or Pentium Silver) while retaining full SVID functionality and protection features. The ISL95812HRZ maintains 0.5% system accuracy and remote sensing capability regardless of phase count.
ISL95812HRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for ISL95812HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95812HRZ 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 reliable?
The price and inventory of ISL95812HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95812HRZ is usually 5 days.
3.What payment methods are accepted for ISL95812HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95812HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95812HRZ?
ISL95812HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95812HRZ 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?
For technical support, including ISL95812HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95812HRZ requirements.
6.How does Aetrix verify that ISL95812HRZ is sourced from the original manufacturer or authorized distributors?
All ISL95812HRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL95812HRZ?
All ISL95812HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95812HRZ, 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 part is unused and in its original packaging.
Return procedure for ISL95812HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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