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Renesas ISL95831CHRTZ-T
- Part No.:
- ISL95831CHRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL95831CHRTZ-T.pdf
- Description:
- IC REG CONV INTEL 2OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,307
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Product details
Overview
ISL95831CHRTZ-T from Renesas (formerly Intersil) is a dual-output, IMVP-7/VR12™-compliant 3+1-phase voltage regulator IC for CPU/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. It is used in high-efficiency notebook/desktop VRMs.
For engineers reviewing the ISL95831CHRTZ-T datasheet, ISL95831CHRTZ-T pinout, ISL95831CHRTZ-T application, or ISL95831CHRTZ-T equivalent, key selection criteria include phase configurability (3/2/1-phase + 1-phase), R3™ ripple-regulator transient response, serial bus interface compliance with IMVP-7/VR12™, and dual remote-sense capability with DCR temperature compensation.
Technical Context
The ISL95831CHRTZ-T implements Intersil's Robust Ripple Regulator (R3™) PWM architecture, enabling variable switching frequency during load transients and faster transient settling versus fixed-frequency modulators. Its dual-output structure shares a single serial control bus to reduce component count and PCB area versus discrete dual-IC solutions.
Each output supports differential remote voltage sensing, programmable overcurrent (IMAX) and thermal (TMAX) limits, and adaptive body diode conduction time reduction. Current sensing is configurable via lossless DCR (with single NTC thermistor compensation) or precision shunt resistor methods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | Compliant with IMVP-7 and VR12™ specifications for CPU/GPU core power sequencing and telemetry. |
| Output Configuration | First output: configurable as 3-, 2-, or 1-phase VR; second output: fixed 1-phase VR - enables flexible multi-core or hybrid CPU+GPU power partitioning. |
| System Accuracy | ±0.5% over full temperature range - ensures tight VOUT tolerance under thermal stress for stable processor operation. |
| Current Sensing | Supports both DCR (with single NTC for temperature compensation) and precision resistor methods - eliminates need for separate current-sense amplifiers. |
| Switching Control | R3™ technology with variable-frequency PWM during transients - reduces output voltage deviation during sudden load steps (e.g., CPU turbo burst). |
| Voltage Sensing | Differential remote sense on both outputs - rejects PCB IR drop to maintain accurate core voltage at the processor die. |
Pinout & Package
ISL95831CHRTZ-T is housed in a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per Intersil FN7977 Rev 0.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN3 | High-side gate driver supply inputs | Power each of three integrated gate drivers; support independent bootstrap charging for high-side FETs. |
| PHASE1–PHASE3 | Phase output terminals | Drive external high-side and low-side MOSFET pairs for first (configurable) VR output. |
| PHASE4 | Second VR phase terminal | Drives single high-side/low-side pair for dedicated 1-phase GPU or I/O rail. |
| SCL/SDA | Serial control bus interface | Two-wire SMBus-compatible interface for VR configuration, telemetry readback, and fault reporting per IMVP-7/VR12™. |
| VSNSP/VSNSN | Differential remote sense inputs (Output 1) | Connect directly to CPU VCC_CORE pins to compensate for PCB trace resistance and ensure accurate regulation at load. |
| VSNSP2/VSNSN2 | Differential remote sense inputs (Output 2) | Enable independent remote sensing for second output - critical when powering GPU or auxiliary logic with different layout path. |
Key Features
| Feature | Design Value |
|---|---|
| Robust Ripple Regulator (R3™) PWM | Variable switching frequency during load transients improves transient response and light-load efficiency without requiring external compensation. |
| Configurable 3+1-phase topology | Single IC supports scalable CPU core (3/2/1-phase) and GPU/I/O (1-phase) rails - reduces BOM count and layout complexity vs. dual-chip solutions. |
| Single-NTC DCR temperature compensation | One thermistor calibrates DCR drift across temperature for both outputs - eliminates need for dual NTCs or complex calibration routines. |
| Programmable VBOOT voltage | Adjustable bootstrap capacitor precharge level ensures reliable high-side FET turn-on during startup under varying input conditions. |
| Dual independent Power-Good signals | Separate PG outputs per VR allow sequenced power-up and independent fault detection - essential for multi-rail CPU/GPU systems. |
Applications
| Notebook CPU Core VRM | Desktop VR12™ Platform |
|---|---|
Use Scenario: High-performance ultrabook with quad-core mobile CPU requiring dynamic phase shedding and tight voltage regulation under burst workloads. IC Role / Device Role / Timing Role: Primary 3-phase core VR controller with integrated gate drivers and IMVP-7-compliant telemetry interface. Use Value: Enables <1% load-line deviation (per Fig. 1) and sub-10µs transient recovery - maintains CPU stability during Turbo Boost transitions. | Use Scenario: VR12™-compliant desktop motherboard delivering power to LGA1155/1150 CPUs with dual-rail requirements (core + graphics). IC Role / Device Role / Timing Role: Dual-output VR controller managing CPU VCC and GPU VCCIO rails via shared SMBus interface. Use Value: Reduces board area by 35% vs. discrete dual-VR solutions while maintaining independent remote sensing and OC protection per rail. |
| Gaming Laptop GPU Power | Embedded Computing Module |
Use Scenario: Thin-and-light gaming laptop with discrete NVIDIA GPU requiring dedicated 1-phase rail synchronized with CPU VR. IC Role / Device Role / Timing Role: Second output (PHASE4) configured as standalone 1-phase VR for GPU core voltage, controlled via same serial bus. Use Value: Eliminates need for separate GPU VR controller IC - simplifies firmware, reduces cost, and enables coordinated thermal throttling. | Use Scenario: Fanless industrial embedded module with Intel Atom® or Core™ i-series processor operating in extended temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: IMVP-7-compliant VR controller providing ±0.5% system accuracy and DCR-based current sensing with NTC compensation. Use Value: Ensures guaranteed voltage accuracy across full industrial temp range without recalibration - critical for long-life unattended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3567BMTRPBF | 4+1 phase, supports VR12.5/IMVP-8, higher max phase count but no R3™ variable-frequency modulation. | Targeted at next-gen platforms requiring higher current density and digital PID tuning; lacks adaptive body diode reduction. | Choose IR3567BMTRPBF for VR12.5-compliant designs needing >3-phase CPU rail scalability. |
| TPS53679RSBT | 6+1 phase, TI NexFET™ drivers integrated, supports PMBus 1.3, no native IMVP-7 serial bus framing. | Requires firmware adaptation for IMVP-7 command set; optimized for server/workstation with higher IMAX and telemetry depth. | Choose TPS53679RSBT when PMBus ecosystem integration and higher phase count outweigh IMVP-7 protocol compatibility needs. |
Compared with IR3567BMTRPBF and TPS53679RSBT, the ISL95831CHRTZ-T offers native IMVP-7/VR12™ serial bus compliance, R3™ transient optimization, and minimal external component count for mainstream client platforms - making it optimal for cost-sensitive, space-constrained notebook and desktop VRMs where strict specification alignment is required.
Availability
ISL95831CHRTZ-T is available at Aetrix Electronics and suitable for notebook VRMs, desktop VR12™ motherboards, gaming laptop GPU power stages, and industrial embedded computing modules requiring stable component supply and long-term lifecycle support.
Supply support for ISL95831CHRTZ-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) is a global semiconductor leader specializing in microcontrollers, analog, power management, and connectivity solutions for automotive, industrial, and computing markets.
The ISL95831CHRTZ-T belongs to Renesas' legacy Intersil CPU voltage regulator product line, designed specifically to meet IMVP-7 and VR12™ specifications for high-efficiency, multi-phase core power delivery in client computing platforms.
FAQ
What is the primary compliance standard supported by the ISL95831CHRTZ-T?
The ISL95831CHRTZ-T is fully compliant with both IMVP-7 and VR12™ specifications, including serial bus command structure, telemetry reporting format, and power-state transition timing. This dual compliance allows direct deployment in Intel 2nd–4th Gen Core™ platforms and VR12™-enabled chipsets without protocol translation or firmware modification. The ISL95831CHRTZ-T implements all mandatory registers and fault-handling sequences defined in the IMVP-7/VR12™ specification documents.
How does the R3™ technology in the ISL95831CHRTZ-T improve transient response?
The ISL95831CHRTZ-T uses Intersil's Robust Ripple Regulator (R3™) PWM architecture, which dynamically adjusts switching frequency during load transients to minimize output voltage deviation. Unlike fixed-frequency controllers, R3™ increases frequency under heavy load steps and reduces it at light loads - achieving faster settling time (<10 µs typical) and improved light-load efficiency. This behavior is intrinsic to the ISL95831CHRTZ-T's internal modulator and requires no external tuning components.
Can the ISL95831CHRTZ-T support both DCR and resistor-based current sensing simultaneously?
No - the ISL95831CHRTZ-T supports either DCR current sensing (with single NTC thermistor for temperature compensation) or precision resistor sensing per output, but not both simultaneously on the same rail. Each output has dedicated sense-input configurations: DCR mode uses VSNSP/VSNSN with optional RTN connection, while resistor mode requires RS+ and RS− inputs. The ISL95831CHRTZ-T's configuration pins and register settings determine the active method per VR output.
What is the function of the VBOOT pin on the ISL95831CHRTZ-T?
The VBOOT pin on the ISL95831CHRTZ-T sets the initial bootstrap capacitor precharge voltage during startup, ensuring reliable turn-on of external high-side MOSFETs regardless of input voltage level. It is resistor-programmable (typically 5–12 V range) and directly affects gate drive strength and shoot-through immunity. This feature is implemented in hardware within the ISL95831CHRTZ-T and does not require software configuration.
Does the ISL95831CHRTZ-T provide independent Power-Good signaling for each output?
Yes - the ISL95831CHRTZ-T provides two dedicated Power-Good (PG) outputs: PG1 for the first (configurable-phase) VR and PG2 for the second (1-phase) VR. Each signal asserts high only when its respective output is within regulation, has completed soft-start, and reports no active faults. This independence enables safe, sequenced power-up of CPU and GPU domains and supports fault-isolation diagnostics in systems using the ISL95831CHRTZ-T.
ISL95831CHRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
ISL95831CHRTZ-T FAQ
1.How can I place an order for ISL95831CHRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95831CHRTZ-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 ISL95831CHRTZ-T reliable?
The price and inventory of ISL95831CHRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95831CHRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL95831CHRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95831CHRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95831CHRTZ-T?
ISL95831CHRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95831CHRTZ-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 ISL95831CHRTZ-T?
For technical support, including ISL95831CHRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95831CHRTZ-T requirements.
6.How does Aetrix verify that ISL95831CHRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95831CHRTZ-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 ISL95831CHRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL95831CHRTZ-T?
All ISL95831CHRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95831CHRTZ-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 ISL95831CHRTZ-T part is unused and in its original packaging.
Return procedure for ISL95831CHRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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