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Renesas ISL95831HRTZ
- Part No.:
- ISL95831HRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL95831HRTZ.pdf
- Description:
- IC REG CONV INTEL 2OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,784
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Product details
Overview
ISL95831HRTZ from Renesas (formerly Intersil) is a dual-output, IMVP-7/VR12™-compliant 3+1-phase voltage regulator IC for CPU and GPU core power delivery. It integrates three gate drivers, supports DCR/resistor current sensing, achieves 0.5% system accuracy over temperature, and delivers programmable VBOOT, IMAX, TMAX, and adaptive body diode conduction control in a 40-pin QFN package.
For engineers reviewing the ISL95831HRTZ datasheet, ISL95831HRTZ pinout, ISL95831HRTZ application, or ISL95831HRTZ equivalent, key selection criteria include IMVP-7/VR12™ compliance, R3™ ripple-regulator transient response, dual-output phase configurability (3/2/1 + 1), remote voltage sensing, and integrated gate driver count per output.
Technical Context
The ISL95831HRTZ implements Intersil's Robust Ripple Regulator (R3™) PWM architecture, enabling variable switching frequency during load transients and faster transient settling versus conventional modulators. Its serial control bus interfaces directly with IMVP-7/VR12™-compliant CPUs to coordinate VID updates and telemetry.
It supports two independent VR outputs: Output 1 is configurable as 3-, 2-, or 1-phase using two integrated high-side/low-side gate drivers; Output 2 is fixed 1-phase with one integrated gate driver. Both outputs feature differential remote sensing, programmable overcurrent thresholds, and separate Power-Good signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | IMVP-7/VR12™ compliant - enables direct communication with Intel CPUs for dynamic VID adjustment and telemetry reporting. |
| Output Configuration | 3+1-phase: Output 1 configurable as 3-/2-/1-phase (2 gate drivers); Output 2 fixed 1-phase (1 gate driver) - supports scalable CPU/GPU core rail design. |
| System Accuracy | ±0.5% over temperature - ensures tight VOUT regulation across industrial operating range without external calibration. |
| Current Sensing | DCR-based (lossless) or precision resistor-based - eliminates sense resistor power loss or enables highest accuracy with matched RSENSE. |
| Voltage Sensing | Differential remote sense - compensates for PCB IR drop to maintain accurate voltage at CPU die, critical for sub-1V operation. |
| Startup Control | Programmable VBOOT - sets bootstrap capacitor precharge voltage to ensure reliable high-side FET turn-on during power-up. |
| Protection | Separate OC, thermal, and PG per output - allows independent fault handling and sequencing for multi-rail systems. |
Pinout & Package
ISL95831HRTZ is housed in a thermally enhanced 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per Intersil FN7613 Rev 1.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input supply rails | Accepts 5V–24V input; VIN1 powers Output 1 drivers, VIN2 powers Output 2 driver and logic - enables independent input sourcing. |
| PHASE1A–PHASE1C, PHASE2 | Gate drive outputs | Three dedicated gate drive outputs: PHASE1A/C for 3-phase Output 1; PHASE1A/B for 2-phase; PHASE2 for Output 2 - matches exact phase count configuration. |
| VSNSx+, VSNSx− | Differential remote sense inputs | Paired inputs per output (VSNS1+/−, VSNS2+/−) - reject common-mode noise and measure true die voltage at CPU/GPU pads. |
| SMBCLK/SMBDAT | Serial bus interface | Two-wire SMBus 2.0 interface - communicates VID codes, temperature, current, and status with IMVP-7/VR12™ host controller. |
| PGOOD1/PGOOD2 | Power-good indicators | Open-drain outputs asserting high when respective output is within ±5% regulation window - enables safe system power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulator | Variable-frequency operation during transients improves load-step response time and reduces output capacitance requirements. |
| Adaptive Body Diode Conduction Time Reduction | Minimizes shoot-through and conduction losses in synchronous buck stages by dynamically adjusting dead-time based on load and temperature. |
| Single NTC Thermistor Support | Enables DCR temperature compensation for both outputs using one external NTC - reduces BOM count and layout complexity. |
| Programmable IMAX/TMAX | Resistor-settable overcurrent and thermal trip thresholds per output - allows precise protection tuning without firmware changes. |
| Configurable Phase Count | Output 1 supports 3-/2-/1-phase via pin-strapping or SMBus command - adapts to CPU core count and power envelope without hardware redesign. |
Applications
| Laptop CPU Core Power | Desktop VRM Module |
|---|---|
Use Scenario: High-efficiency, compact core voltage regulation for dual-core and quad-core mobile CPUs in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary IMVP-7/VR12™-compliant voltage regulator controlling VCC rail with dynamic VID tracking and telemetry feedback. Use Value: Enables sub-1V operation with ±0.5% accuracy and fast transient response, extending battery life while maintaining CPU performance headroom. | Use Scenario: Modular, upgradeable VRM solution for enthusiast desktop motherboards supporting multiple CPU generations. IC Role / Device Role / Timing Role: Dual-output controller managing CPU VCC and GPU VCCIO rails with independent phase configuration and protection. Use Value: Reduces component count vs. dual-chip solutions and simplifies layout with shared SMBus interface and single-NTC thermal compensation. |
| Embedded Graphics Power | Workstation Multi-Rail System |
Use Scenario: Dedicated core power for integrated graphics units (IGP) in fanless embedded systems requiring low acoustic noise and thermal headroom. IC Role / Device Role / Timing Role: Secondary 1-phase VR output delivering stable GPU core voltage with remote sensing and programmable startup timing. Use Value: Maintains graphics performance under burst workloads via R3™-enhanced transient response and adaptive body diode control. | Use Scenario: Multi-rail power architecture for high-end workstations where CPU and GPU require independent voltage, current, and thermal management. IC Role / Device Role / Timing Role: Dual-output regulator providing isolated control, monitoring, and protection for CPU and GPU core domains. Use Value: Eliminates cross-talk between rails with separate PG, OC, and thermal limits - improves system reliability during simultaneous heavy compute loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output IMVP-7/VR12™ voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95832HRTZ | Same pinout and feature set but supports 3+2-phase (three gate drivers for Output 1, two for Output 2) - higher phase count for extreme CPU power delivery. | Targeted at high-TDP server/workstation CPUs requiring >200A total output; not suitable for space-constrained mobile designs. | Select ISL95832HRTZ only when Output 2 requires 2-phase capability and board layout accommodates additional MOSFETs and inductors. |
| RT8803AZQW | Single-chip dual-output VR with IMVP-8 support, 4 integrated gate drivers, and integrated MOSFET drivers - no external gate drivers needed but lacks R3™ modulation. | Designed for newer platforms requiring IMVP-8 compliance and lower BOM cost; does not support IMVP-7 legacy systems or R3™ transient optimization. | Choose RT8803AZQW for new IMVP-8 designs prioritizing integration; retain ISL95831HRTZ for IMVP-7/VR12™-only compatibility and superior light-load efficiency. |
Compared with ISL95831HRTZ, ISL95832HRTZ extends phase scalability for Output 2, while RT8803AZQW shifts to IMVP-8 with driver integration but sacrifices R3™ transient benefits - selection depends strictly on CPU generation, phase demand, and efficiency targets.
Availability
ISL95831HRTZ is available at Aetrix Electronics and suitable for laptop CPU core power, desktop VRM modules, and embedded graphics power applications requiring stable component supply, long-term lifecycle support, and IMVP-7/VR12™ compliance.
Supply support for ISL95831HRTZ 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 maintains its high-performance analog and power management portfolio. Renesas is ISO 9001-certified and supplies mission-critical power ICs for computing, industrial, and automotive markets.
The ISL95831HRTZ belongs to Intersil's IMVP-7/VR12™ CPU voltage regulator product line, engineered specifically for high-efficiency, multi-phase core power delivery in Intel-based client platforms with strict transient and accuracy requirements.
FAQ
What is the primary function of the ISL95831HRTZ in a CPU power delivery system?
The ISL95831HRTZ serves as a dual-output, IMVP-7/VR12™-compliant voltage regulator IC that manages CPU and GPU core power rails. It provides precise, dynamically adjusted voltage regulation using R3™ PWM technology, integrated gate drivers, and SMBus communication. The ISL95831HRTZ ensures stable sub-1V operation with ±0.5% accuracy, remote sensing, and fast transient response - all essential for modern Intel processors.
Does the ISL95831HRTZ support both DCR and resistor-based current sensing?
Yes, the ISL95831HRTZ supports both lossless inductor DCR current sensing and precision resistor-based current sensing on both outputs. It also accepts a single NTC thermistor for DCR temperature compensation across both rails. This dual-sensing flexibility allows designers to optimize for efficiency (DCR) or accuracy (resistor), and the ISL95831HRTZ handles calibration and compensation internally without external circuitry.
What package type and pin count does the ISL95831HRTZ use?
The ISL95831HRTZ uses a 40-pin QFN package measuring 6mm × 6mm with 0.5mm pitch and an exposed thermal pad. This thermally enhanced package supports high-current operation in space-constrained laptop and motherboard VRM layouts. Pin assignments - including PHASE1A–PHASE1C, PHASE2, VSNS1+/−, VSNS2+/−, and SMBCLK/SMBDAT - are fully documented in the FN7613 datasheet for the ISL95831HRTZ.
Can the ISL95831HRTZ be configured for different phase counts on its first output?
Yes, the ISL95831HRTZ allows Output 1 to be configured as 3-phase, 2-phase, or 1-phase via pin-strapping or SMBus commands. This is enabled by its two integrated gate drivers assigned to Output 1. The ISL95831HRTZ automatically adjusts PWM timing, current sharing, and protection thresholds based on the selected phase count - providing hardware- and software-flexible adaptation to varying CPU core counts and power demands.
How does the ISL95831HRTZ achieve improved light-load efficiency?
The ISL95831HRTZ achieves improved light-load efficiency through its R3™ PWM modulator, which automatically reduces switching frequency during low-current conditions. This lowers switching losses without compromising regulation stability. Combined with adaptive body diode conduction time reduction and discontinuous conduction mode (DCM) support, the ISL95831HRTZ maintains high efficiency across the full 0–60A load range - a key advantage over fixed-frequency controllers in battery-powered systems.
ISL95831HRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
ISL95831HRTZ FAQ
1.How can I place an order for ISL95831HRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95831HRTZ 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 ISL95831HRTZ reliable?
The price and inventory of ISL95831HRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95831HRTZ is usually 5 days.
3.What payment methods are accepted for ISL95831HRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95831HRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95831HRTZ?
ISL95831HRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95831HRTZ 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 ISL95831HRTZ?
For technical support, including ISL95831HRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95831HRTZ requirements.
6.How does Aetrix verify that ISL95831HRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95831HRTZ 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 ISL95831HRTZ meets industry standards.
7.What is the process for return or replacement of ISL95831HRTZ?
All ISL95831HRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95831HRTZ, 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 ISL95831HRTZ part is unused and in its original packaging.
Return procedure for ISL95831HRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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