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Renesas ISL95818HRTZ
- Part No.:
- ISL95818HRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95818HRTZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,984
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Product details
Overview
ISL95818HRTZ from Renesas (formerly Intersil) is a 3-phase PWM controller for Intel VR12.5 and VR12.6+ CPU core power delivery, featuring R3™ modulation, integrated dual gate drivers, 0.5% system voltage accuracy over temperature, and support for DCR/resistor current sensing. It enables compact, high-efficiency multiphase VRMs in space-constrained notebook and desktop platforms.
For engineers reviewing the ISL95818HRTZ datasheet, ISL95818HRTZ pinout, ISL95818HRTZ application, or ISL95818HRTZ equivalent, key selection criteria include VR12.5/VR12.6+ compliance, R3™ transient response behavior, programmable ICCMAX and slew rate, remote differential voltage sensing, and flexible phase configuration (1-/2-/3-phase) using two on-die drivers plus one external driver.
Technical Context
The ISL95818HRTZ implements Intersil's Robust Ripple Regulator (R3™) technology, delivering variable-frequency PWM with faster transient settling versus fixed-frequency modulators and automatic frequency scaling at light load to improve efficiency. Its control loop supports both lossless DCR current sensing (with NTC-based temperature compensation) and precision resistor-based current sensing.
It communicates with the CPU via a serial data bus (SVID), enabling dynamic voltage/frequency scaling and telemetry. The device configures as 1-, 2-, or 3-phase using two integrated high-side/low-side gate drivers and one external driver, with programmable VBOOT, ICCMAX, and voltage transition slew rate to meet VR12.5/VR12.6+ specification timing and stability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Compliance | Fully compliant with Intel VR12.5 and VR12.6+ specifications for CPU core VRMs. |
| Phase Configuration | Configurable 1-, 2-, or 3-phase operation using two integrated gate drivers + one external driver. |
| Voltage Accuracy | ±0.5% system accuracy over full temperature range - ensures stable CPU core voltage under thermal stress. |
| Current Sensing | Supports both lossless inductor DCR sensing (with NTC compensation) and precision resistor sensing. |
| Modulation Technology | R3™ (Robust Ripple Regulator) - enables variable switching frequency, faster transient response, and improved light-load efficiency. |
| Interface | SVID serial bus - enables bidirectional communication with CPU for VID updates, telemetry, and fault reporting. |
| Voltage Transition Control | Resistor-programmable slew rate and ICCMAX - allows precise tuning of dV/dt and current limit during voltage transitions per VR spec. |
Pinout & Package
ISL95818HRTZ 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 | Connects to 5V or 12V input; powers internal circuitry and gate drivers. |
| VDDIO | I/O supply | Provides 3.3V bias for SVID interface and logic; decoupling required. |
| PHASE1–PHASE3 | Phase output terminals | Drive external high-side FETs (PHASE1/2 use integrated drivers; PHASE3 requires external driver). |
| DRV1H/DRV1L, DRV2H/DRV2L | Integrated gate driver outputs | Directly drive high-side/low-side FETs for Phase 1 and Phase 2; 1.5A peak sink/source capability. |
| VSNSP/VSNSN | Differential remote sense inputs | Enable Kelvin sensing at CPU pads to compensate PCB IR drop and ensure accurate core voltage regulation. |
| SVID_DATA/SVID_CLK | SVID serial interface | Two-wire bus for dynamic VID updates, telemetry readback, and fault signaling per Intel SVID protocol. |
| PGOOD | Power-good indicator | Open-drain output asserting when output voltage is within ±5% of target and all protections are inactive. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulation | Variable-frequency PWM with adaptive transient response - reduces output capacitance requirement by up to 30% vs fixed-frequency controllers. |
| Flexible Phase Scaling | Runtime-selectable 1-/2-/3-phase operation - enables dynamic power-state adaptation (e.g., C-states) without hardware change. |
| Dual Current Sensing Support | DCR + NTC or precision resistor options - eliminates need for dedicated current-sense resistors while maintaining <1% current measurement error. |
| Programmable Transient Parameters | Resistor-set ICCMAX and voltage slew rate - ensures VR12.5/VR12.6+ compliant dV/dt and di/dt during P-state transitions. |
| Differential Remote Sensing | VSNSP/VSNSN inputs with 10µV offset - corrects for PCB trace resistance up to 20mΩ, maintaining ±0.5% regulation at CPU die. |
Applications
| Notebook CPU VRM | Desktop CPU VRM |
|---|---|
Use Scenario: Core voltage regulation for mobile Intel Core i-series processors in ultrabooks and thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary multiphase PWM controller managing up to 3 phases, communicating via SVID to coordinate with CPU P-states and thermal throttling. Use Value: Enables compact 3-phase VRM design with <7mm × 7mm footprint and meets VR12.6+ 0.5% accuracy requirement across –10°C to +100°C ambient. | Use Scenario: High-current core power delivery for LGA1151/1200 desktop CPUs with aggressive transient loads. IC Role / Device Role / Timing Role: Configurable 3-phase VR controller with adaptive body diode conduction reduction to minimize shoot-through losses during load steps. Use Value: Delivers >200A total output with R3™-enabled sub-10µs transient recovery, reducing bulk capacitor count by 25% vs legacy VRMs. |
| VR12.5 Server Node | VR12.6+ Embedded Workstation |
Use Scenario: Power management for entry-level Xeon E3/E5 processors in microservers and storage controllers. IC Role / Device Role / Timing Role: VR12.5-compliant controller supporting programmable VBOOT and ICCMAX to match server BIOS power-up sequencing and OCP thresholds. Use Value: Ensures reliable cold-start with controlled inrush and meets Intel's 2ms VOUT rise time spec using resistor-programmed slew rate. | Use Scenario: High-reliability CPU power in industrial workstations requiring extended temperature operation and long-term BOM stability. IC Role / Device Role / Timing Role: Multiphase controller with differential remote sensing and NTC-compensated DCR current sensing for drift-free current reporting over 10-year field life. Use Value: Maintains ±0.5% voltage accuracy from –40°C to +105°C junction, eliminating recalibration needs in fanless embedded enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Fixed 3-phase architecture; no 1-/2-phase reconfiguration; uses digital DCDA control instead of R3™ analog modulation. | Targeted at higher-end desktop/server VRMs with tighter current-sharing tolerance (<±2%) but less flexible phase scaling. | Choose IR35201MTRPBF when strict inter-phase current balance is required and SVID v3.0+ features (e.g., fast VID slew) are needed. |
| TPS53689RTAR | TI NexFET™-optimized controller; supports up to 6 phases; includes integrated MOSFET drivers with 2A peak drive; lacks NTC-based DCR compensation. | Designed for high-density, high-current VRMs (e.g., HEDT platforms); requires external current-sense amplifiers for resistor sensing. | Choose TPS53689RTAR when scaling beyond 3 phases or driving low-RDS(on) NexFETs with higher gate charge. |
Compared with IR35201MTRPBF and TPS53689RTAR, the ISL95818HRTZ offers unique R3™ modulation for superior light-load efficiency and runtime-configurable phase count - critical for battery-powered notebooks where dynamic power-state adaptation directly impacts runtime and thermal envelope.
Availability
ISL95818HRTZ is available at Aetrix Electronics and suitable for notebook computers, desktop computers, and VR12.5/VR12.6+-compliant embedded workstations requiring stable component supply and long-term lifecycle support.
Supply support for ISL95818HRTZ 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, and SoC solutions for automotive, industrial, and computing markets.
The ISL95818HRTZ belongs to Renesas' Computing Power VRM/IMVP product line, engineered specifically to deliver Intel-compliant, high-efficiency, thermally robust core voltage regulation for mobile and desktop CPUs.
FAQ
What CPU generations does the ISL95818HRTZ support?
The ISL95818HRTZ is fully compliant with Intel VR12.5 and VR12.6+ specifications, supporting 3rd- through 10th-generation Intel Core processors (including mobile ULV, HQ, and desktop K-series SKUs) that require SVID-based dynamic voltage scaling and precise load-line regulation. It does not support VR13 or newer specifications.
Does the ISL95818HRTZ require external gate drivers for all phases?
No - the ISL95818HRTZ integrates two complete high-side/low-side gate drivers (DRV1H/L and DRV2H/L) for Phases 1 and 2. Phase 3 requires an external driver such as the ISL6617A or compatible 2A peak driver. This architecture enables flexible 1-/2-/3-phase configurations without redundant on-die drivers.
How is current sensing implemented in the ISL95818HRTZ?
The ISL95818HRTZ supports two validated current sensing methods: (1) lossless inductor DCR sensing with optional NTC thermistor for temperature compensation, and (2) precision shunt resistor sensing. Both methods feed into the same current-summing node and are selectable via pin strapping or SVID command, ensuring <1% total current measurement error across temperature.
What is the role of R3™ technology in the ISL95818HRTZ?
R3™ (Robust Ripple Regulator) technology in the ISL95818HRTZ provides variable-frequency PWM control that adapts switching frequency during load transients - accelerating response time to <10µs - and reduces frequency at light load to cut switching losses. This improves full-load efficiency by ~2% and light-load efficiency by >15% versus fixed-frequency controllers.
Can the ISL95818HRTZ be used in VR12.0 or IMVP7 designs?
No - the ISL95818HRTZ is designed exclusively for VR12.5 and VR12.6+ compliance. It implements SVID v2.0+ features including programmable ICCMAX, enhanced load-line accuracy, and VBOOT control not present in VR12.0/IMVP7. Using it in older VR platforms would violate specification timing and protection thresholds.
ISL95818HRTZ 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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL95818HRTZ FAQ
1.How can I place an order for ISL95818HRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95818HRTZ 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 ISL95818HRTZ reliable?
The price and inventory of ISL95818HRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95818HRTZ is usually 5 days.
3.What payment methods are accepted for ISL95818HRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95818HRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95818HRTZ?
ISL95818HRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95818HRTZ 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 ISL95818HRTZ?
For technical support, including ISL95818HRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95818HRTZ requirements.
6.How does Aetrix verify that ISL95818HRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95818HRTZ 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 ISL95818HRTZ meets industry standards.
7.What is the process for return or replacement of ISL95818HRTZ?
All ISL95818HRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95818HRTZ, 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 ISL95818HRTZ part is unused and in its original packaging.
Return procedure for ISL95818HRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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