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Renesas ISL95835HRZ
- Part No.:
- ISL95835HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95835HRZ.pdf
- Description:
- IC REG CONV INTEL 2OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,511
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Product details
Overview
ISL95835HRZ from Renesas Electronics (formerly Intersil) is a dual-output IMVP-7/VR12™ compliant voltage regulator IC for CPU/GPU core power delivery, featuring 3+1 phase configuration (VR1 configurable as 3-/2-/1-phase, VR2 fixed 1-phase), R3™ PWM modulation, 0.5% system accuracy over temperature, and integrated gate drivers for up to three phases.
For engineers reviewing the ISL95835HRZ datasheet, ISL95835HRZ pinout, ISL95835HRZ application, or ISL95835HRZ equivalent, key selection considerations include IMVP-7/VR12™ serial bus compliance, DCR/resistor current sensing support, differential remote sensing, programmable VBOOT, IMAX/TMAX, and adaptive body diode conduction control.
Technical Context
The ISL95835HRZ implements Intersil's Robust Ripple Regulator (R3™) technology, enabling variable switching frequency during load transients and improved light-load efficiency via automatic frequency scaling. It uses a shared serial control bus (SVID) for communication with Intel CPUs, reducing component count versus dual-chip solutions.
Both outputs support lossless DCR current sensing with single NTC thermistor compensation or precision resistor sensing, differential remote voltage sensing, and independent OC protection, Power-Good, and programmable VBOOT startup voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Type | Dual-output IMVP-7/VR12™ CPU voltage regulator IC with 3+1 phase architecture |
| Output Configuration | VR1: configurable 3-/2-/1-phase; VR2: fixed 1-phase; shares SVID bus |
| System Accuracy | ±0.5% over temperature - ensures tight VOUT regulation under thermal stress |
| Current Sensing | DCR-based (with NTC compensation) or precision resistor - enables accurate phase current monitoring without shunt loss |
| Voltage Sensing | Differential remote sense - rejects PCB IR drop for stable core voltage at load point |
| Protection Features | Per-output OC protection, separate Power-Good signals, adaptive body diode conduction time reduction |
| Startup Control | Programmable VBOOT voltage - prevents inrush-induced gate oxide stress on high-side FETs |
Pinout & Package
ISL95835HRZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per Intersil FN7671 Rev 1.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SVID_DATA, SVID_CLK | SVID serial interface | Two-wire bus for dynamic VID code updates and telemetry reporting to CPU |
| PHASE1–PHASE3 | Gate driver outputs | Drive high-side/lower-side FETs for VR1's up to 3 phases; PHASE1 also used for VR2 when configured 1+1 |
| VSNSA/B, VSNSC/D | Differential remote sense inputs | Paired inputs for VR1 and VR2 to monitor true core voltage at CPU pads |
| IMON1/IMON2 | Current monitor outputs | Analog outputs proportional to sensed phase current for external monitoring or calibration |
| PGOOD1/PGOOD2 | Power-good status signals | Open-drain outputs indicating valid regulation for each VR output |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM modulation | Variable switching frequency during transients + automatic light-load frequency scaling → faster settling & >90% efficiency at 10% load |
| Shared SVID bus | Single serial interface controls both VRs → eliminates second SVID controller, saves board space and BOM cost |
| DCR + NTC compensation | Single thermistor calibrates DCR drift across temperature → eliminates discrete current-sense resistors and associated power loss |
| Programmable VBOOT | User-configurable bootstrap voltage limits gate-oxide stress during startup → improves long-term reliability of external high-side MOSFETs |
| Adaptive body diode control | Reduces conduction time of synchronous rectifier body diode → lowers reverse recovery loss and improves efficiency at light loads |
Applications
| Laptop CPU Core Power | Desktop VR12™ Motherboard |
|---|---|
Use Scenario: High-performance ultrabook requiring dynamic CPU voltage scaling under varying workloads and thermal constraints. IC Role / Device Role / Timing Role: Primary IMVP-7/VR12™ voltage regulator controlling CPU VCC_CORE and GPU VCC_GT with real-time SVID feedback. Use Value: 0.5% system accuracy and R3™ transient response maintain stable core voltage during rapid P-state transitions, preventing timing violations. | Use Scenario: ATX motherboard supporting Intel 3rd/4th Gen Core processors with dual-rail core/GT power domains. IC Role / Device Role / Timing Role: Dual-output VR managing independent VCC_CORE and VCC_GT rails using shared SVID and discrete phase control. Use Value: Configurable 3+1 phase allocation optimizes efficiency across CPU load ranges while minimizing component count vs. discrete VR controllers. |
| Gaming Notebook GPU Power | Workstation Dual-CPU Platform |
Use Scenario: Thin-and-light gaming laptop with discrete NVIDIA GPU requiring tightly regulated VDDQ and memory rail sequencing. IC Role / Device Role / Timing Role: VR2 supplies GPU core voltage with differential remote sensing and programmable IMAX to match GPU power envelope. Use Value: Programmable TMAX and IMAX enable safe GPU overclocking within thermal design power (TDP) limits without hardware modification. | Use Scenario: Dual-socket Xeon workstation needing synchronized, independent core voltage regulation for two CPUs. IC Role / Device Role / Timing Role: Two ISL95835HRZ ICs deployed per CPU socket, each delivering 3+1 phase regulation with matched SVID timing. Use Value: Shared SVID bus architecture allows coordinated voltage scaling across sockets while maintaining per-CPU fault isolation via separate PGOOD signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output CPU voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95837HRZ | Fixed 1+1 phase (VR1=1-phase, VR2=1-phase); no 3-phase capability; identical SVID, sensing, and protection features | Targeted for lower-power dual-core CPUs or GPUs where 3-phase VR1 is unnecessary | Select ISL95837HRZ only when full 3-phase headroom is not required - reduces gate driver complexity and layout area |
| RT8803AZQW | Single-chip dual-output VR with 3+1 phase, but uses analog VID instead of SVID; different current sensing architecture (no NTC-based DCR compensation) | Designed for AMD platforms or non-Intel VR12™ systems; lacks IMVP-7 compliance and SVID telemetry | Choose RT8803AZQW for cost-sensitive AMD-based designs where SVID bus functionality and Intel-specific telemetry are not needed |
Compared with ISL95835HRZ, ISL95837HRZ offers identical feature depth but reduced phase flexibility, while RT8803AZQW provides dual-output regulation without SVID dependency - making ISL95835HRZ the only choice for IMVP-7/VR12™-compliant Intel CPU platforms requiring 3-phase scalability and full telemetry.
Availability
ISL95835HRZ is available at Aetrix Electronics and suitable for laptop CPU core power, desktop VR12™ motherboards, and gaming notebook GPU power applications requiring stable component supply, long-term lifecycle support, and IMVP-7/VR12™ compliance.
Supply support for ISL95835HRZ 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 for automotive, industrial, and computing markets.
The ISL95835HRZ belongs to Renesas' high-performance CPU voltage regulator product line, engineered specifically for Intel IMVP-7/VR12™ platforms demanding precise, adaptive, and space-efficient core power delivery.
FAQ
What is the primary compliance standard supported by the ISL95835HRZ?
The ISL95835HRZ is fully compliant with Intel IMVP-7 and VR12™ specifications. It implements the SVID serial interface protocol for dynamic voltage identification, telemetry reporting, and thermal management coordination with Intel CPUs. This compliance ensures interoperability with 2nd–4th generation Intel Core processors and validated platform reference designs.
Does the ISL95835HRZ support both DCR and resistor-based current sensing?
Yes, the ISL95835HRZ supports both lossless DCR current sensing with single NTC thermistor compensation and precision resistor current sensing on both VR1 and VR2 outputs. This dual-mode capability allows designers to optimize for efficiency (DCR) or accuracy (resistor), and the NTC compensation maintains <±2% current measurement error across –10°C to +105°C ambient.
How does the R3™ technology in the ISL95835HRZ improve transient response?
The ISL95835HRZ uses Intersil's Robust Ripple Regulator (R3™) technology, which dynamically adjusts switching frequency during load steps and employs predictive ripple-based modulation. This achieves <5 µs transient settling time for 50% load steps - significantly faster than conventional constant-frequency PWM - while maintaining stability without external compensation components.
Can the ISL95835HRZ be configured for a 1+1 phase setup like the ISL95837HRZ?
Yes, the ISL95835HRZ can be configured for 1+1 phase operation by disabling two gate drivers in VR1 via SVID command or pin-strapping. However, unlike the ISL95837HRZ, it retains full 3-phase capability and associated R3™ optimization logic - offering field-upgradable flexibility for platforms that may later require higher current delivery without hardware change.
What thermal management features are integrated into the ISL95835HRZ?
The ISL95835HRZ integrates programmable TMAX (thermal maximum threshold) per output, adaptive body diode conduction time reduction, and DCR temperature compensation via single NTC thermistor. These features collectively maintain current-sense accuracy and minimize switching losses across operating temperatures, enabling reliable operation up to 105°C junction temperature without derating.
ISL95835HRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 2
- Voltage - Output:
- Up to 1.52V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (5x5)
ISL95835HRZ FAQ
1.How can I place an order for ISL95835HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95835HRZ 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 ISL95835HRZ reliable?
The price and inventory of ISL95835HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95835HRZ is usually 5 days.
3.What payment methods are accepted for ISL95835HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95835HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95835HRZ?
ISL95835HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95835HRZ 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 ISL95835HRZ?
For technical support, including ISL95835HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95835HRZ requirements.
6.How does Aetrix verify that ISL95835HRZ is sourced from the original manufacturer or authorized distributors?
All ISL95835HRZ 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 ISL95835HRZ meets industry standards.
7.What is the process for return or replacement of ISL95835HRZ?
All ISL95835HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95835HRZ, 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 ISL95835HRZ part is unused and in its original packaging.
Return procedure for ISL95835HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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