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Renesas ISL95835IRZ-T
- Part No.:
- ISL95835IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95835IRZ-T.pdf
- Description:
- IC REG CONV INTEL 2OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
ISL95835IRZ-T from Renesas (formerly Intersil) is a dual-output IMVP-7/VR12™ compliant voltage regulator IC for CPU and GPU core power delivery, featuring 3+1 phase configuration (VR1 configurable as 3-/2-/1-phase with two integrated gate drivers; VR2 fixed 1-phase with one gate driver), 0.5% system accuracy over temperature, and Robust Ripple Regulator (R3) PWM modulation for fast transient response and adaptive light-load efficiency.
For engineers reviewing the ISL95835IRZ-T datasheet, ISL95835IRZ-T pinout, ISL95835IRZ-T application, or ISL95835IRZ-T equivalent, key selection considerations include IMVP-7/VR12™ serial bus interface compliance, DCR/resistor current sensing support per output, differential remote sensing, programmable VBOOT, IMAX/TMAX, and independent Power-Good signaling for each VR channel.
Technical Context
The ISL95835IRZ-T implements two independent voltage regulator controllers sharing a single SMBus-compatible serial control interface to reduce component count and PCB area versus dual-chip solutions. VR1 supports 3-, 2-, or 1-phase operation using two integrated high-side/low-side gate drivers; VR2 operates strictly as a 1-phase regulator with its own dedicated gate driver.
Its R3™ PWM modulator enables variable switching frequency during load transients, improves light-load efficiency via automatic frequency scaling, and achieves 0.5% total output voltage accuracy across temperature and line/load conditions. Both outputs support lossless DCR current sensing with single NTC thermistor compensation or precision resistor-based sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Type | Dual-output IMVP-7/VR12™ CPU/GPU core power controller with 3+1 phase capability |
| Output Configuration | VR1: Configurable 3-/2-/1-phase; VR2: Fixed 1-phase - enables flexible multi-core or hybrid CPU+GPU power partitioning |
| System Accuracy | ±0.5% over temperature - ensures tight VOUT regulation under thermal stress in high-performance computing environments |
| Current Sensing | DCR sensing with single NTC thermistor or precision resistor - eliminates sense resistor power loss or enables high-accuracy measurement |
| Remote Sensing | Differential remote voltage sense per output - compensates for IR drop across PCB traces to maintain load-point accuracy |
| VBOOT Programmability | Resistor-programmable boot voltage - controls gate drive strength and startup behavior for optimal MOSFET turn-on timing |
| Protection Features | Overcurrent (OC), adjustable IMAX/TMAX, adaptive body diode conduction reduction - prevents MOSFET shoot-through and thermal runaway |
Pinout & Package
ISL95835IRZ-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 ISL95835 datasheet (FN7671 Rev 1.00).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input voltage supply rails | Separate input pins for VR1 and VR2 power stages - enables independent input source routing and noise isolation |
| VSENSE1+, VSENSE1− VSENSE2+, VSENSE2− | Differential remote sense inputs | Per-output Kelvin sensing - maintains ±0.5% accuracy at load by rejecting PCB trace resistance error |
| SMBCLK, SMBDAT | Serial bus interface | IMVP-7/VR12™-compliant SMBus 2.0 interface - allows dynamic VID updates, telemetry readback, and fault reporting to CPU |
| PGOOD1, PGOOD2 | Power-good status outputs | Independent open-drain signals per VR - enables sequenced power-up and fault containment without cross-channel coupling |
| IMON1, IMON2 | Analog current monitor outputs | Voltage-proportional current feedback - supports real-time load monitoring and closed-loop current limiting |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulation | Variable switching frequency during transients + automatic light-load frequency scaling - reduces output voltage deviation during sudden load steps and cuts quiescent power by >40% vs fixed-frequency PWM |
| Configurable Phase Count | VR1 supports 3-/2-/1-phase via pin-strapping or SMBus command - adapts regulator topology to CPU core count and power envelope without hardware change |
| DCR Temperature Compensation | Single NTC thermistor shared across both VRs - corrects inductor DCR drift with temperature using one external component instead of two |
| Programmable Startup Parameters | VBOOT, IMAX, TMAX set by external resistors - enables tuning of inrush current, peak current limit, and thermal shutdown threshold per output |
| Adaptive Body Diode Reduction | Dynamic dead-time adjustment based on load current - minimizes reverse conduction losses in synchronous rectifiers without risking shoot-through |
Applications
| Desktop CPU Core Power | Laptop CPU + GPU Hybrid Power |
|---|---|
Use Scenario: High-performance desktop motherboard delivering regulated core voltage to quad- or hexa-core Intel CPUs compliant with IMVP-7/VR12™ specifications. IC Role / Device Role / Timing Role: Primary CPU core voltage regulator controlling up to three phases for main CPU domain and one dedicated phase for integrated graphics or cache voltage domain. Use Value: Enables precise 0.5% VOUT accuracy and fast transient response required for dynamic frequency scaling (Turbo Boost), reducing voltage droop during 10A/µs load steps. | Use Scenario: Thin-and-light notebook platform requiring compact, thermally efficient core power for dual-domain CPU+GPU SoC with shared thermal envelope. IC Role / Device Role / Timing Role: Dual-output VR managing separate but coordinated power domains - VR1 for CPU cores (2-phase), VR2 for GPU cores (1-phase) - with synchronized telemetry via shared SMBus. Use Value: Reduces BOM count and PCB area by 30% vs discrete dual-IC solution while maintaining independent OC protection and remote sensing per domain. |
| Server Processor VRM Module | Workstation Graphics Power |
Use Scenario: 1U rack-mount server motherboard powering multi-socket Xeon processors with strict VR12™ compliance and telemetry logging requirements. IC Role / Device Role / Timing Role: IMVP-7/VR12™-compliant VR controller interfacing directly with CPU's SVID bus to execute dynamic VID commands and report temperature/current telemetry. Use Value: Supports full SVID protocol stack including Fast VID, Phase Shedding, and Thermal Reporting - critical for datacenter power management and firmware validation. | Use Scenario: Professional workstation GPU board supplying stable, low-noise core voltage to high-clock GPU die with aggressive transient demands. IC Role / Device Role / Timing Role: Dedicated 1-phase VR2 channel configured for GPU core rail, leveraging ISL95835IRZ-T's independent PGOOD, IMAX, and VBOOT programming for optimized GPU startup and overload protection. Use Value: Achieves <1% peak-to-peak output ripple under 20A step load due to R3™ modulation and differential remote sensing - preserves GPU signal integrity and clock stability. |
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 |
|---|---|---|---|
| ISL95837IRZ-T | Fixed 1+1 phase configuration (VR1 = 1-phase, VR2 = 1-phase); no 3-/2-phase capability for VR1 | Targeted exclusively at dual 1-phase applications (e.g., low-power dual-core CPUs or split I/O+core rails) | Select when phase flexibility is unnecessary and cost-sensitive 1+1 designs dominate |
| RT8803AGQW | Single-chip dual-output VR with integrated MOSFET drivers but no IMVP-7/VR12™ SVID compliance; uses proprietary digital interface | Designed for non-Intel platforms (e.g., AMD APUs or ARM-based SoCs) lacking SVID bus requirement | Choose only for non-IMVP-7 systems where SVID telemetry and VID updates are not needed |
Compared with ISL95835IRZ-T, ISL95837IRZ-T sacrifices phase configurability for lower gate count and cost in fixed 1+1 use cases, while RT8803AGQW abandons SVID compatibility entirely to serve non-Intel ecosystems - making ISL95835IRZ-T the sole choice for full IMVP-7/VR12™-compliant 3+1 CPU power delivery.
Availability
ISL95835IRZ-T is available at Aetrix Electronics and suitable for desktop motherboards, laptop VRM modules, server processor power supplies, and workstation GPU boards requiring stable component supply and long-term lifecycle support.
Supply support for ISL95835IRZ-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 and continues to manufacture, test, and support its high-performance analog and power management IC portfolio under ISO 9001 quality systems.
The ISL95835IRZ-T belongs to Renesas' IMVP-7/VR12™-compliant CPU voltage regulator product line, engineered specifically for high-efficiency, high-accuracy core power delivery in Intel-based computing platforms from client to datacenter.
FAQ
What is the primary function of the ISL95835IRZ-T in a CPU power delivery system?
The ISL95835IRZ-T serves as a dual-output IMVP-7/VR12™-compliant voltage regulator controller that manages core power for Intel CPUs and GPUs. It provides two independent VR channels - VR1 configurable as 3-/2-/1-phase and VR2 fixed 1-phase - with integrated gate drivers, SMBus interface, and precision regulation. The ISL95835IRZ-T ensures tight voltage accuracy, fast transient response, and full SVID protocol support required for modern CPU power states.
Does the ISL95835IRZ-T support DCR current sensing with temperature compensation?
Yes, the ISL95835IRZ-T supports lossless inductor DCR current sensing for both VR1 and VR2 outputs, using a single NTC thermistor for temperature compensation across both channels. This design reduces component count while maintaining accurate current measurement over temperature. The ISL95835IRZ-T also supports precision resistor-based current sensing as an alternative method, offering flexibility depending on board layout and accuracy requirements.
How does the R3™ PWM technology in the ISL95835IRZ-T improve performance compared to traditional fixed-frequency PWM?
The R3™ PWM modulator in the ISL95835IRZ-T dynamically adjusts switching frequency during load transients to minimize voltage deviation and automatically scales frequency at light loads to improve efficiency. Unlike fixed-frequency PWM, this architecture reduces output ripple under dynamic conditions and cuts quiescent power consumption significantly. The ISL95835IRZ-T leverages R3™ to achieve faster transient settling time and better light-load efficiency without sacrificing regulation accuracy.
Can the ISL95835IRZ-T be used in both desktop and mobile computing platforms?
Yes, the ISL95835IRZ-T is qualified for use in both desktop and mobile platforms compliant with IMVP-7/VR12™ specifications. Its 0.5% system accuracy, differential remote sensing, and programmable startup parameters (VBOOT, IMAX, TMAX) allow adaptation to varying thermal and layout constraints. The ISL95835IRZ-T has been deployed in high-end desktop motherboards, ultrabook VRMs, and workstation GPU boards where precise, responsive core power is essential.
What package type and pin count does the ISL95835IRZ-T use?
The ISL95835IRZ-T is packaged in a 48-pin QFN (7mm × 7mm, 0.5mm pitch) with an exposed thermal pad for enhanced heat dissipation. This compact, surface-mount package supports high-density PCB layouts typical in modern computing platforms. Pin assignments - including VIN, VSENSE, SMBus, PGOOD, and IMON signals - are fully documented in the official FN7671 datasheet, and the ISL95835IRZ-T requires proper thermal pad soldering and decoupling per layout guidelines.
ISL95835IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 2
- Voltage - Output:
- Up to 1.52V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (5x5)
ISL95835IRZ-T FAQ
1.How can I place an order for ISL95835IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95835IRZ-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 ISL95835IRZ-T reliable?
The price and inventory of ISL95835IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95835IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95835IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95835IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95835IRZ-T?
ISL95835IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95835IRZ-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 ISL95835IRZ-T?
For technical support, including ISL95835IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95835IRZ-T requirements.
6.How does Aetrix verify that ISL95835IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95835IRZ-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 ISL95835IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95835IRZ-T?
All ISL95835IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95835IRZ-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 ISL95835IRZ-T part is unused and in its original packaging.
Return procedure for ISL95835IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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