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Renesas ISL95816AHRZ-T
- Part No.:
- ISL95816AHRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95816AHRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,045
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Product details
Overview
ISL95816AHRZ-T from Renesas (formerly Intersil) is a 4-phase PWM controller IC designed for VR12.5 and VR12.6-compliant CPU core power supplies, featuring R3™ modulator architecture, 0.5% system voltage accuracy over temperature, programmable switching frequency (up to 1.5 MHz), DCR/resistor current sensing, and differential remote voltage sensing - deployed in high-efficiency notebook/desktop VRMs.
For engineers reviewing the ISL95816AHRZ-T datasheet, ISL95816AHRZ-T pinout, ISL95816AHRZ-T application, or ISL95816AHRZ-T equivalent, key selection criteria include VR12.5/VR12.6 serial bus compliance, phase configurability (1–4 phases), R3™ transient response behavior, VBOOT/IMAX programmability, and DCR temperature compensation support with single NTC.
Technical Context
The ISL95816AHRZ-T implements a digital serial control interface (SVID) for dynamic voltage/frequency scaling with Intel CPUs, enabling load-line regulation and adaptive body diode conduction time reduction. It supports full VR12.5/VR12.6 command sets including PS4 low-power state entry and exit.
R3™ Technology provides variable-frequency operation during transients - increasing frequency under heavy load steps for faster response, then reducing frequency at light loads to improve efficiency. The modulator operates without external compensation components and maintains stability across input voltages from 4.5V to 24V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Standard | VR12.5 and VR12.6 compliant via SVID serial bus - enables direct CPU communication for VID code updates and power-state transitions. |
| Phase Support | Configurable 1-, 2-, 3-, or 4-phase operation - allows scalable VRM design matching CPU current demand and thermal constraints. |
| Voltage Accuracy | ±0.5% system accuracy over temperature - ensures tight core voltage regulation critical for CPU timing margin and reliability. |
| Current Sensing | Supports lossless DCR sensing with single-NCT thermistor compensation or precision resistor sensing - eliminates sense resistor power loss or enables higher accuracy. |
| Switching Frequency | Resistor-programmable up to 1.5 MHz - balances EMI, efficiency, and component size in compact VRM layouts. |
| Protection Features | Adjustable overcurrent protection, remote differential voltage sensing, and Power-Good signal generation - ensures robust fault detection and safe CPU power sequencing. |
Pinout & Package
ISL95816AHRZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per Intersil FN8599 Rev 1.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 4.5V–24V input; powers internal circuitry and gate drivers - requires local bulk and ceramic decoupling. |
| VDD | Bias supply | Internal LDO output for logic and analog blocks; must be bypassed with 1µF ceramic capacitor. |
| PHASE1–PHASE4 | Phase driver outputs | Four independent high-side/low-side gate drive outputs - each controls one buck phase power stage. |
| SVID_DATA / SVID_CLK | Serial bus interface | Two-wire SVID interface for bidirectional communication with CPU - supports VR12.5/VR12.6 command set and telemetry. |
| IMON1–IMON4 | Current sense inputs | Differential inputs for DCR or resistor-based current sensing per phase - enable per-phase current monitoring and OCP. |
| VSENSE+ / VSENSE− | Remote voltage sense | Differential pair for Kelvin-sense connection at CPU Vcore pads - cancels PCB IR drop for accurate regulation. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator | Variable-frequency operation improves transient response (sub-µs recovery) and light-load efficiency - no external compensation required. |
| Programmable VBOOT | Startup bootstrap voltage adjustable via external resistor - ensures reliable high-side FET turn-on during cold boot and brown-out recovery. |
| Adaptive Body Diode Conduction Reduction | Minimizes reverse conduction losses in low-side MOSFETs during dead-time - increases VRM efficiency by ~1–2% at mid-load. |
| PS4 Low-Power State Support | Ultra-low quiescent current (<50 µA) in PS4 mode - extends battery life in mobile platforms during deep sleep states. |
| Load-Line Regulation | Programmable droop (ΔV/ΔI) via SVID commands - maintains CPU timing margins under dynamic current steps without requiring external resistors. |
Applications
| Notebook CPU VRM | Desktop CPU VRM |
|---|---|
Use Scenario: High-performance ultrabook with quad-core Intel Core i7 processor requiring dynamic voltage scaling and thermal headroom management. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller managing Vcore delivery, SVID handshake, and load-line regulation per VR12.6 spec. Use Value: Enables sub-100ns transient response and ±0.5% voltage accuracy - preserves CPU timing closure under rapid P-state transitions. | Use Scenario: ATX motherboard supporting 65W–95W desktop CPUs with multi-phase VRM layout constrained by VRM heatsink footprint. IC Role / Device Role / Timing Role: Configurable 3-phase controller optimizing efficiency vs. board area trade-off while maintaining VR12.5 compliance. Use Value: Resistor-programmable frequency (600 kHz–1.5 MHz) allows optimal inductor sizing - reduces total solution height and cost. |
| Gaming Laptop VRM | Workstation VRM |
Use Scenario: 17-inch gaming laptop with overclockable CPU demanding aggressive transient handling and thermal-aware current limiting. IC Role / Device Role / Timing Role: 4-phase controller with adjustable overcurrent threshold and adaptive body diode control - manages peak currents up to 120A. Use Value: DCR current sensing with single NTC compensation maintains ±3% current accuracy across -10°C to +95°C - prevents false OCP trips during thermal cycling. | Use Scenario: Dual-socket workstation motherboard powering Xeon W-series CPUs with strict voltage ripple and sequencing requirements. IC Role / Device Role / Timing Role: Dual ISL95816AHRZ-T controllers (one per socket) operating in synchronized 4-phase mode with shared SVID bus. Use Value: Differential remote sensing eliminates >15mV PCB IR drop - ensures <10mV actual Vcore ripple at CPU die under 80A load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU voltage regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | VR12.5/VR12.6 compliant; 4-phase; fixed 600 kHz–1.2 MHz frequency range; no R3™ modulator - uses traditional constant-frequency COT. | Lacks variable-frequency transient boost; lower light-load efficiency; requires external compensation network. | Preferred where design reuse of IR35201 reference layout exists and R3™ benefits are non-critical. |
| RT8803AZQW | VR12.5/VR12.6 compliant; 4-phase; supports R3-like adaptive frequency but not licensed R3™; 0.8% voltage accuracy over temp. | Higher voltage tolerance; no native PS4 support; limited SVID command set coverage vs. ISL95816AHRZ-T. | Consider for cost-sensitive designs where ±0.8% accuracy and absence of PS4 are acceptable. |
Compared with IR35201MTRPBF and RT8803AZQW, the ISL95816AHRZ-T delivers superior transient response via R3™, tighter 0.5% voltage accuracy, native PS4 support, and simpler layout due to no external compensation - making it optimal for performance-critical VR12.5/VR12.6 implementations.
Availability
ISL95816AHRZ-T is available at Aetrix Electronics and suitable for notebook VRMs, desktop motherboard power delivery, and workstation CPU voltage regulation requiring stable component supply, long-term lifecycle support, and VR12.5/VR12.6 compliance.
Supply support for ISL95816AHRZ-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 acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio. Intersil was founded in 1967 and specialized in precision analog, power ICs, and interface solutions.
The ISL95816AHRZ-T belongs to Intersil's VR12.x CPU power controller product line, engineered specifically for Intel microprocessor core voltage regulation with emphasis on transient fidelity, efficiency across load range, and seamless SVID integration.
FAQ
What CPU standards does the ISL95816AHRZ-T support?
The ISL95816AHRZ-T fully supports VR12.5 and VR12.6 specifications, including full SVID command set implementation for VID programming, power-state transitions (PS0–PS4), telemetry reporting, and load-line regulation. It is validated for use with Intel 3rd–6th Gen Core processors and select Xeon E3 series CPUs requiring VR12.x compliance.
Does the ISL95816AHRZ-T require external compensation components?
No, the ISL95816AHRZ-T uses Intersil's R3™ modulator architecture, which eliminates the need for external Type-II or Type-III compensation networks. Stability is inherent across all operating conditions, including 1–4 phase configurations, input voltages from 4.5V to 24V, and load ranges from 0A to >100A per VRM.
How is current sensing implemented on the ISL95816AHRZ-T?
The ISL95816AHRZ-T supports two current sensing methods: lossless DCR sensing using inductor resistance with single NTC thermistor for temperature compensation, or precision shunt resistor sensing. Both methods feed into dedicated IMONx inputs and enable per-phase overcurrent protection with adjustable thresholds.
What is the purpose of the VBOOT pin on the ISL95816AHRZ-T?
The VBOOT pin on the ISL95816AHRZ-T sets the initial bootstrap capacitor charging voltage during startup. It is resistor-programmable to ensure reliable high-side MOSFET turn-on under varying input conditions - critical for preventing shoot-through and ensuring clean power-up sequencing in VR12.5/VR12.6 systems.
Can the ISL95816AHRZ-T operate in fewer than 4 phases?
Yes, the ISL95816AHRZ-T is fully configurable for 1-, 2-, 3-, or 4-phase operation via pin-strapping or SVID configuration. Phase count is dynamically adjustable - enabling flexible VRM design scaling and compatibility with CPUs having different current delivery requirements without changing the controller IC.
ISL95816AHRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5, VR12.6
- Voltage - Input:
- 4.5V ~ 28V
- 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:
- 32-QFN (4x4)
ISL95816AHRZ-T FAQ
1.How can I place an order for ISL95816AHRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95816AHRZ-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 ISL95816AHRZ-T reliable?
The price and inventory of ISL95816AHRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95816AHRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95816AHRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95816AHRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95816AHRZ-T?
ISL95816AHRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95816AHRZ-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 ISL95816AHRZ-T?
For technical support, including ISL95816AHRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95816AHRZ-T requirements.
6.How does Aetrix verify that ISL95816AHRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95816AHRZ-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 ISL95816AHRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95816AHRZ-T?
All ISL95816AHRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95816AHRZ-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 ISL95816AHRZ-T part is unused and in its original packaging.
Return procedure for ISL95816AHRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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