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Renesas ISL95818IRTZ
- Part No.:
- ISL95818IRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95818IRTZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,913
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Product details
Overview
ISL95818IRTZ from Renesas (formerly Intersil) is a 3-phase PWM controller for Intel VR12.5 and VR12.6+ CPU core power delivery, featuring R3™ PWM modulation, ±0.5% system voltage accuracy over temperature, and integrated dual gate drivers supporting 1-/2-/3-phase configuration. It enables precision core voltage regulation in notebook and desktop VRMs.
For engineers reviewing the ISL95818IRTZ datasheet, ISL95818IRTZ pinout, ISL95818IRTZ application, or ISL95818IRTZ equivalent, key selection criteria include VR12.5/VR12.6+ compliance, DCR/resistor current sensing support, programmable ICCMAX and VBOOT, remote differential voltage sensing, and adaptive body diode conduction control.
Technical Context
The ISL95818IRTZ implements Intersil's Robust Ripple Regulator (R3™) technology, delivering variable switching frequency during load transients and improved light-load efficiency via automatic frequency scaling. Its PWM modulator achieves faster transient settling than conventional fixed-frequency controllers.
It supports three output phase configurations (1-, 2-, or 3-phase) using two integrated high-side/low-side gate drivers plus one external driver, and interfaces with the CPU via SMBus-compatible serial data bus for VID code interpretation and telemetry reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Compliance | Fully compliant with Intel VR12.5 and VR12.6+ specifications for CPU core VRM control |
| Voltage Accuracy | ±0.5% system accuracy over full temperature range - ensures stable core voltage under thermal stress |
| Current Sensing | Supports lossless DCR sensing with NTC compensation or precision resistor-based sensing - eliminates sense resistor power loss |
| Voltage Sensing | Differential remote voltage sensing - rejects PCB IR drop for accurate core voltage regulation |
| Startup Control | Resistor-programmable VBOOT voltage - prevents inrush-induced overshoot during power-up |
| Protection | Programmable ICCMAX limit + overcurrent protection + Power-Good output - enables safe, monitored CPU power sequencing |
Pinout & Package
ISL95818IRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per Renesas ISL95818 datasheet Rev. 3.00 (2013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V or 12V input to power internal circuitry and gate drivers |
| VDDIO | I/O supply | Provides 3.3V bias for SMBus interface and logic circuits |
| SMBCLK / SMBDAT | Serial bus interface | SMBus-compatible bidirectional communication with CPU for VID, telemetry, and fault reporting |
| PHASE0–PHASE2 | Phase output drive signals | Drive external high-side MOSFETs; PHASE0/PHASE1 sourced internally, PHASE2 requires external driver |
| BOOT0–BOOT2 | Bootstrap supply terminals | Enable high-side gate drive in each phase via external bootstrap capacitors |
| ISENx+ | Current sense inputs | Accept differential DCR or resistor-based current sense signals per phase |
| VSNS+/VSNS− | Remote voltage sense | Connect directly to CPU VCC_CORE pins to compensate for PCB trace resistance |
| PGOOD | Power-good indicator | Open-drain output asserting when output voltage is within ±5% of target and stable |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulation | Variable switching frequency during transients improves response time and light-load efficiency without external compensation |
| Configurable Phase Count | Software- or resistor-selectable 1-/2-/3-phase operation enables single IC reuse across multiple platform power requirements |
| Adaptive Body Diode Conduction | Reduces low-side MOSFET conduction time during light loads - minimizes reverse recovery losses and improves efficiency |
| Programmable Slew Rate | Resistor-adjustable voltage transition rate prevents excessive dV/dt-induced EMI and ensures smooth VID transitions |
| Thermal Compensation | Single NTC thermistor input enables real-time DCR temperature compensation - maintains current-sense accuracy across operating temperature |
Applications
| Notebook CPU VRM | Desktop CPU VRM |
|---|---|
Use Scenario: Core voltage regulation for mobile Intel Core i-series processors in space-constrained 15.6″ and ultrabook platforms. IC Role / Device Role / Timing Role: Primary multiphase PWM controller managing up to 3 phases, interfacing via SMBus for dynamic VID updates and telemetry. Use Value: Enables compact, high-efficiency VRM design with ±0.5% voltage accuracy and adaptive body diode control for extended battery life. | Use Scenario: High-current core power delivery for LGA1151/LGA1200 desktop CPUs requiring robust transient response and thermal stability. IC Role / Device Role / Timing Role: Configurable 3-phase VR controller with remote sensing and programmable ICCMAX to meet Intel VR12.6+ specification limits. Use Value: Supports precise load-line calibration and DCR-based current monitoring without sense resistors - reducing BOM cost and board area. |
| VR12.5 Server Node | VR12.6+ Embedded Workstation |
Use Scenario: Single-socket server motherboard VRM for Xeon E3/E5 derivatives where VR12.5 compliance and SMBus telemetry are required. IC Role / Device Role / Timing Role: Multiphase controller implementing Intel-defined VR12.5 protocol, including VRHot, PROCHOT#, and thermal reporting. Use Value: Delivers verified VR12.5 compliance with 0.5% system accuracy - critical for reliable operation under sustained multi-core loads. | Use Scenario: Fanless embedded workstation with Intel Core i7-H series CPU requiring silent, thermally robust core power. IC Role / Device Role / Timing Role: 2-phase VR controller using DCR sensing and NTC compensation to maintain current accuracy across −40°C to +85°C ambient. Use Value: Eliminates sense resistor heat generation while sustaining ±0.5% voltage regulation - enabling passive cooling viability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports VR12/VR12.5 only; lacks VR12.6+ features like enhanced load line and VRHot reporting; uses different SMBus command set | Targeted at legacy VR12 platforms; not suitable for VR12.6+ CPU compatibility validation | Select ISL95818IRTZ for new VR12.6+ designs requiring full specification compliance and adaptive body diode optimization |
| RT8803AZQW | 3-phase controller with VR12.5 support but no VR12.6+ mode; offers fewer current sensing options (DCR-only, no resistor option); no NTC compensation input | Lower-cost alternative for basic VR12.5 notebooks without advanced telemetry or thermal compensation needs | Choose ISL95818IRTZ when DCR/resistor sensing flexibility, NTC-based thermal compensation, or VR12.6+ feature set is required |
Compared with IR35201MTRPBF and RT8803AZQW, the ISL95818IRTZ uniquely delivers full VR12.6+ compliance, dual current sensing methodology support, and adaptive body diode conduction - making it the only option for validated next-generation CPU VRM designs requiring all three capabilities.
Availability
ISL95818IRTZ is available at Aetrix Electronics and suitable for notebook computers, desktop motherboards, and embedded workstation VRMs requiring stable component supply, long-term lifecycle support, and VR12.5/VR12.6+ specification compliance.
Supply support for ISL95818IRTZ 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 for computing, industrial, and automotive markets.
The ISL95818IRTZ belongs to Renesas' Computing Power VRM/IMVP product line, designed specifically to meet Intel's evolving voltage regulator specifications for client and entry-server microprocessors.
FAQ
What CPU generations does the ISL95818IRTZ support?
The ISL95818IRTZ fully supports Intel VR12.5 and VR12.6+ specifications, enabling compatibility with 4th–10th Gen Core i3/i5/i7/i9 processors (Haswell through Comet Lake), select Xeon E3/E5 derivatives, and compatible Pentium/Celeron CPUs requiring those VRM standards. It is not compatible with VR13 or newer specifications.
Does the ISL95818IRTZ require an external gate driver?
Yes - the ISL95818IRTZ integrates two high-side/low-side gate drivers for PHASE0 and PHASE1, but requires an external driver (e.g., ISL6617A) for PHASE2 in 3-phase configurations. This architecture allows flexible phase count selection while maintaining optimal drive strength per channel.
How does the ISL95818IRTZ achieve ±0.5% voltage accuracy?
The ISL95818IRTZ achieves ±0.5% system accuracy over temperature through precision internal reference trimming, differential remote voltage sensing to eliminate PCB IR drop error, and on-die temperature compensation of the feedback amplifier. This specification is validated across −10°C to +100°C junction temperature per the official Renesas datasheet.
Can the ISL95818IRTZ be used with both DCR and resistor current sensing simultaneously?
No - the ISL95818IRTZ supports either DCR-based or resistor-based current sensing per phase, selected at startup via configuration pins. It does not allow concurrent use of both methods on the same phase. Each method requires dedicated layout and component choices (NTC for DCR; precision shunt for resistor).
What is the function of the VBOOT pin on the ISL95818IRTZ?
The VBOOT pin on the ISL95818IRTZ sets the initial boot voltage level before VID code acquisition from the CPU. It is resistor-programmable to prevent overshoot during power-up and ensure controlled ramp-up of the core voltage - critical for preventing CPU latch-up or reset instability in high-speed platforms.
ISL95818IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5, VR12.6+
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL95818IRTZ FAQ
1.How can I place an order for ISL95818IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95818IRTZ 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 ISL95818IRTZ reliable?
The price and inventory of ISL95818IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95818IRTZ is usually 5 days.
3.What payment methods are accepted for ISL95818IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95818IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95818IRTZ?
ISL95818IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95818IRTZ 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 ISL95818IRTZ?
For technical support, including ISL95818IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95818IRTZ requirements.
6.How does Aetrix verify that ISL95818IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95818IRTZ 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 ISL95818IRTZ meets industry standards.
7.What is the process for return or replacement of ISL95818IRTZ?
All ISL95818IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95818IRTZ, 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 ISL95818IRTZ part is unused and in its original packaging.
Return procedure for ISL95818IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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