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Renesas ISL95831CIRTZ
- Part No.:
- ISL95831CIRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL95831CIRTZ.pdf
- Description:
- IC REG CONV INTEL 2OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,628
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Product details
Overview
ISL95831CIRTZ from Intersil is a dual-output, IMVP-7/VR12™-compliant 3+1 voltage regulator IC for CPU and GPU core power delivery. It integrates three gate drivers, supports DCR/resistor current sensing, delivers 0.5% system accuracy over temperature, and features R3™ PWM modulation with adaptive body diode conduction reduction. It is used in high-efficiency notebook and desktop motherboard VRMs.
For engineers reviewing the ISL95831CIRTZ datasheet, ISL95831CIRTZ pinout, ISL95831CIRTZ application, or ISL95831CIRTZ equivalent, key selection criteria include phase configurability (3-/2-/1-phase first output + fixed 1-phase second output), serial bus interface compliance with IMVP-7/VR12™, remote voltage sensing, programmable VBOOT, IMAX/TMAX, and load-line regulation per Figure 1.
Technical Context
The ISL95831CIRTZ implements Intersil's Robust Ripple Regulator (R3™) technology, enabling variable switching frequency during load transients and improved light-load efficiency via automatic frequency scaling. Its dual-output architecture uses a shared serial control bus to communicate with the CPU, reducing component count versus discrete two-chip solutions.
Both outputs support differential remote voltage sensing, lossless DCR current sensing with single NTC thermistor compensation, or precision resistor-based current sensing. Each output includes independent OC protection, Power-Good signaling, and resistor-programmable IMAX and TMAX thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | IMVP-7/VR12™ compliant - ensures interoperability with Intel CPU/GPU power management protocols and telemetry. |
| Output Configuration | 3+1 topology: Output 1 configurable as 3-, 2-, or 1-phase; Output 2 fixed 1-phase - enables scalable VRM design for CPU cores and integrated graphics. |
| System Accuracy | ±0.5% over temperature - guarantees tight VOUT tolerance across operating range for stable processor operation. |
| Current Sensing | DCR or precision resistor sensing with single NTC compensation - eliminates need for separate current-sense resistors while maintaining thermal accuracy. |
| Load-Line Regulation | Programmable slope per Figure 1 (e.g., 0.80–0.91V at 30–60A) - implements dynamic voltage scaling aligned with CPU VID requests. |
| VBOOT Programmability | Resistor-programmable start-up bootstrap voltage - ensures reliable high-side FET turn-on during cold boot and recovery sequences. |
Pinout & Package
ISL95831CIRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per Intersil FN7977 Rev 0.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input supply rails | Accepts 5V–24V input for respective VR channels; decoupling required per layout guidelines. |
| VSEN1+, VSEN1− VSEN2+, VSEN2− | Differential remote sense inputs | Enables accurate load-point voltage regulation by compensating for PCB IR drop on both outputs. |
| PHASE1, PHASE2, PHASE3 PHASE4 | Gate driver outputs | Drive high-side and low-side FETs for up to three phases on Output 1 and one phase on Output 2. |
| SCL, SDA | Serial bus interface | Two-wire IMVP-7/VR12™-compliant interface for VID communication, telemetry, and fault reporting. |
| PGOOD1, PGOOD2 | Power-good status outputs | Open-drain signals indicating valid regulation and absence of OC/UV/OV faults on each output. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulation | Variable switching frequency during transients improves response time and reduces output capacitance requirements. |
| Adaptive Body Diode Conduction Reduction | Minimizes shoot-through and conduction losses in synchronous buck stages, increasing efficiency at light-to-moderate loads. |
| Shared Serial Bus Architecture | Single SCL/SDA interface controls both VRs, reducing PCB routing complexity and BOM cost versus dual-IC solutions. |
| Programmable Load-Line (LL) | Resistor-configurable droop slope ensures precise VID-to-VOUT mapping per IMVP-7/VR12™ specification. |
Applications
| Notebook CPU VRM | Desktop Platform VRM |
|---|---|
Use Scenario: High-density mobile motherboard requiring compact, thermally efficient core power for dual-core or quad-core CPUs. IC Role / Device Role / Timing Role: Primary 3-phase VR controller for CPU VCC, managing gate drive, current sensing, and VID negotiation via serial bus. Use Value: Enables 0.5% output accuracy and fast transient response under dynamic CPU load changes, extending battery life and preventing throttling. | Use Scenario: ATX motherboard supporting VR12™-compliant 6th–8th Gen Intel Core processors with integrated GPU. IC Role / Device Role / Timing Role: Dual-output controller delivering independent regulated power to CPU cores (Output 1) and GT graphics domain (Output 2). Use Value: Shared serial interface and programmable load line reduce layout area and simplify BIOS integration versus discrete controllers. |
| Gaming Laptop GPU Power | Thin-and-Light Platform VRM |
Use Scenario: Performance-oriented laptop with discrete GPU requiring tightly regulated auxiliary core rail. IC Role / Device Role / Timing Role: Secondary 1-phase VR channel (Output 2) supplies GPU uncore or cache voltage with remote sensing and OC protection. Use Value: Differential remote sensing maintains ±5mV regulation accuracy at GPU die, minimizing voltage margining and thermal derating. | Use Scenario: Ultrabook platform constrained by board space and thermal envelope. IC Role / Device Role / Timing Role: Integrated 3+1 regulator replaces two separate controllers, consolidating gate drivers, sensing, and telemetry into one QFN. Use Value: Reduces total VRM solution size by ~35% and lowers component count, accelerating time-to-market for slim form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT8802AGQW | Single 4+1 phase controller; no shared serial bus - requires separate SMBus lines for each output. | Targeted at VR12.5 platforms with higher phase count; lacks IMVP-7 backward compatibility. | Choose RT8802AGQW only when VR12.5 compliance and >3-phase CPU rail are mandatory. |
| ISL95832IRTZ | Pin-compatible upgrade with enhanced VR12.5 support, extended frequency range (up to 1.5MHz), and improved thermal monitoring resolution. | Same footprint and register map; supports newer CPU generations requiring tighter telemetry granularity. | Select ISL95832IRTZ for new designs targeting 10th Gen+ Intel CPUs or where VR12.5 feature set is required. |
Compared with RT8802AGQW and ISL95832IRTZ, the ISL95831CIRTZ provides verified IMVP-7/VR12™ interoperability, shared serial bus architecture, and production-proven stability in volume notebook platforms - making it optimal for cost-sensitive, legacy-compliant VRM designs.
Availability
ISL95831CIRTZ is available at Aetrix Electronics and suitable for notebook motherboard VRMs, desktop platform power delivery, and thin-and-light computing systems requiring stable component supply and long-term industrial availability.
Supply support for ISL95831CIRTZ 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
Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and power management ICs for computing, industrial, and communications markets.
The ISL95831CIRTZ belongs to Intersil's IMVP-7/VR12™ multi-phase controller product line, engineered specifically for energy-efficient, space-constrained CPU/GPU core power delivery in client computing platforms.
FAQ
What is the primary compliance standard supported by the ISL95831CIRTZ?
The ISL95831CIRTZ is fully compliant with IMVP-7 and VR12™ specifications, enabling direct integration with Intel 2nd–4th Gen Core processors and compatible chipsets. It implements the required serial bus protocol, VID decoding, telemetry reporting, and load-line regulation behavior defined in those standards. This compliance ensures interoperability without firmware modification in certified platforms.
Does the ISL95831CIRTZ support both DCR and resistor-based current sensing?
Yes, the ISL95831CIRTZ supports both lossless DCR current sensing using integrated NTC thermistor compensation and precision resistor-based current sensing on both outputs. The device automatically adapts sensing gain and offset calibration based on the selected method, ensuring ±0.5% current measurement accuracy across temperature - critical for accurate IMAX limiting and thermal management.
How many phases can the ISL95831CIRTZ drive, and how is phase configuration controlled?
The ISL95831CIRTZ drives up to three phases on Output 1 (configurable as 3-, 2-, or 1-phase) and one fixed phase on Output 2, totaling a 3+1 architecture. Phase count is set via external resistor dividers on PHCFG1/PHCFG2 pins and confirmed through serial bus register reads. No reprogramming or firmware update is needed - configuration is hardware-defined at power-up.
What is the function of the VBOOT pin on the ISL95831CIRTZ?
The VBOOT pin on the ISL95831CIRTZ sets the bootstrap capacitor charging voltage for high-side gate drivers. It is resistor-programmable to ensure sufficient gate overdrive during startup and transient recovery. Proper VBOOT configuration prevents shoot-through and ensures robust FET turn-on across input voltage ranges from 5V to 24V, directly impacting VRM reliability and efficiency.
Is the ISL95831CIRTZ pin-compatible with any newer Intersil controllers?
Yes, the ISL95831CIRTZ is pin-compatible with the ISL95832IRTZ, which adds VR12.5 support and extended frequency capability. Both share identical 48-pin QFN packaging, pinout, and register map. Migration requires only firmware updates to enable new telemetry fields - no PCB redesign or layout change is necessary when upgrading to ISL95832IRTZ in existing ISL95831CIRTZ designs.
ISL95831CIRTZ 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
ISL95831CIRTZ FAQ
1.How can I place an order for ISL95831CIRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95831CIRTZ 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 ISL95831CIRTZ reliable?
The price and inventory of ISL95831CIRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95831CIRTZ is usually 5 days.
3.What payment methods are accepted for ISL95831CIRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95831CIRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95831CIRTZ?
ISL95831CIRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95831CIRTZ 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 ISL95831CIRTZ?
For technical support, including ISL95831CIRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95831CIRTZ requirements.
6.How does Aetrix verify that ISL95831CIRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95831CIRTZ 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 ISL95831CIRTZ meets industry standards.
7.What is the process for return or replacement of ISL95831CIRTZ?
All ISL95831CIRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95831CIRTZ, 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 ISL95831CIRTZ part is unused and in its original packaging.
Return procedure for ISL95831CIRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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