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Renesas ISL95816IRZ
- Part No.:
- ISL95816IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95816IRZ.pdf
- Description:
- IC REG CTRLR VR12.5 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,631
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Product details
Overview
ISL95816IRZ from Renesas (formerly Intersil) is a 4-phase VR12.5-compliant PWM controller IC for microprocessor core voltage regulation, featuring R3 modulator technology, 0.5% system accuracy over temperature, programmable switching frequency (up to 1.5 MHz), and support for DCR/resistor current sensing in notebook and desktop CPU power supplies.
For engineers reviewing the ISL95816IRZ datasheet, ISL95816IRZ pinout, ISL95816IRZ application, or ISL95816IRZ equivalent, key selection considerations include VR12.5 serial bus compliance, phase configurability (1–4 phases), R3-based transient response, remote differential voltage sensing, and adaptive body diode conduction control.
Technical Context
The ISL95816IRZ implements Intersil's Robust Ripple Regulator (R3) Technology™, enabling variable-frequency operation during load transients and automatic frequency scaling at light load to improve efficiency. It supports VR12.5 serial communication protocol for dynamic voltage identification (VID) and telemetry with Intel CPUs.
It integrates programmable parameters including VBOOT startup voltage, IMAX current limit, voltage transition slew rate, and switching frequency via external resistors. Current sensing is configurable for lossless DCR (with single NTC thermistor compensation) or precision shunt resistor methods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR Standard | VR12.5 compliant - enables direct serial interface with Intel CPUs for VID, telemetry, and fault reporting. |
| Phase Support | Configurable 1-, 2-, 3-, or 4-phase operation - allows scalable power delivery matching CPU TDP and board space constraints. |
| Modulator Type | R3 Technology™ - delivers faster transient response and variable switching frequency without external compensation. |
| System Accuracy | ±0.5% over temperature - ensures tight core voltage regulation across industrial operating range (–40°C to +125°C). |
| Current Sensing | DCR or resistor-based - supports lossless inductor sensing with NTC compensation or high-precision shunt measurement. |
| Voltage Sensing | Differential remote sense - rejects PCB IR drop to maintain accurate Vcore at CPU pads under high-current conditions. |
| Switching Frequency | Resistor-programmable up to 1.5 MHz - balances efficiency, component size, and EMI performance in compact VR designs. |
Pinout & Package
ISL95816IRZ is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95816 datasheet (FN7979 Rev 0.00) and validated for VR12.5 reference designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | Serial VID input | Accepts 7-bit VR12.5 voltage code from CPU; sets target Vcore dynamically during operation. |
| PHASE1–PHASE4 | Phase driver outputs | Drive external high-side MOSFET gates in each phase; support interleaved timing for ripple cancellation. |
| IMON1–IMON4 | Current sense inputs | Accept DCR-derived or shunt-resistor voltage signals for per-phase current monitoring and OCP. |
| VSENSE+/VSENSE– | Differential remote sense | Measure CPU core voltage directly at load point to compensate for PCB trace resistance and ensure regulation accuracy. |
| PGOOD | Power-Good indicator | Open-drain output asserts high when Vcore is within ±5% of target and all protections are inactive. |
| DRCTRL | Body diode reduction control | Adjusts dead-time to minimize reverse conduction losses in synchronous rectifiers during light-load discontinuous mode. |
Key Features
| Feature | Design Value |
|---|---|
| R3 Modulator | Enables sub-100 ns transient response and automatic frequency scaling below 250 kHz at light load for >90% efficiency at 10% load. |
| Programmable VBOOT | Resistor-set startup gate drive voltage (0.8–1.2 V) ensures reliable high-side MOSFET turn-on during cold boot sequences. |
| Adaptive Body Diode Control | Reduces shoot-through and reverse conduction losses by dynamically adjusting dead-time based on phase current polarity and magnitude. |
| Serial VR12.5 Bus | Replaces parallel VID interface - reduces PCB routing count by 70%, eliminates VID resistor networks, and enables real-time telemetry. |
| Thermal Compensation | Single NTC input supports DCR sensing temperature drift correction across –40°C to +125°C ambient range. |
Applications
| Notebook CPU Core VR | Desktop CPU Core VR |
|---|---|
Use Scenario: High-performance ultrabook with quad-core mobile CPU requiring fast load-step response and low standby power. IC Role / Device Role / Timing Role: Primary 4-phase VR controller managing Vcore delivery, VID interpretation, and telemetry reporting to CPU. Use Value: R3 modulation achieves <50 mV undershoot during 10–90 A load steps; programmable frequency enables optimal trade-off between efficiency and inductor size. | Use Scenario: ATX motherboard supporting Intel LGA1700 processors with multi-phase VR design and thermal-aware current limiting. IC Role / Device Role / Timing Role: Configurable 4-phase PWM controller coordinating gate drivers, current sensing, and remote voltage feedback. Use Value: Differential remote sensing maintains ±3 mV regulation error at CPU die; DCR+NTC compensation ensures stable current reporting across full thermal envelope. |
| VR12.5 Server CPU VR | Embedded x86 Platform VR |
Use Scenario: Dual-socket server board with VR12.5-compliant Xeon Scalable processors demanding robust OCP and telemetry logging. IC Role / Device Role / Timing Role: Serial-bus-enabled VR controller providing IMAX programming, PGOOD sequencing, and fault flag reporting via SMBus. Use Value: Adjustable overcurrent threshold (via resistor) allows precise alignment with MOSFET SOA; VR12.5 bus supports real-time current/voltage readback for platform management. | Use Scenario: Industrial embedded PC using fanless cooling and wide-temperature CPU requiring stable Vcore under thermal stress. IC Role / Device Role / Timing Role: Temperature-compensated 3-phase VR controller with programmable slew rate to prevent overshoot during thermal throttling transitions. Use Value: 0.5% system accuracy over temperature ensures compliance with CPU Vmin/Vmax specs across –40°C to +85°C; adaptive body diode control sustains >85% efficiency at 5% load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95815IRZ | 3-phase only; identical R3 modulator, VR12.5 compliance, and pinout except missing PHASE4/IMON4 pins. | Targeted for lower-TDP CPUs (≤45 W); lacks fourth phase driver and associated current sense path. | Select when total output current ≤120 A and board layout excludes fourth phase stage. |
| RT8803AZQW | VR12.5-compliant 4-phase controller with integrated MOSFET drivers; no R3 modulator - uses conventional constant-frequency COT architecture. | Higher integration (drivers on-die), but slower transient response and fixed-frequency operation limits light-load efficiency. | Choose when reducing external component count is prioritized over peak transient performance or ultra-low idle power. |
Compared with ISL95816IRZ, ISL95815IRZ offers phase-reduced cost savings without sacrificing R3 benefits, while RT8803AZQW trades modulator sophistication for driver integration - making ISL95816IRZ optimal for high-dT/dt CPU loads where regulation accuracy and adaptive frequency matter most.
Availability
ISL95816IRZ is available at Aetrix Electronics and suitable for notebook CPU VR, desktop motherboard VR, and embedded x86 platform power delivery requiring stable component supply, long-term lifecycle support, and VR12.5 protocol compliance.
Supply support for ISL95816IRZ 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, emphasizing reliability, automotive-grade qualification, and industrial longevity.
The ISL95816IRZ belongs to Renesas' VR12.5-compliant multiphase controller product line, engineered specifically for high-efficiency, fast-transient CPU core power delivery in space-constrained client and server platforms.
FAQ
What is the primary function of the ISL95816IRZ in a CPU power delivery system?
The ISL95816IRZ serves as the master 4-phase PWM controller for Intel VR12.5-compliant microprocessor core voltage regulation. It interprets serial VID commands, generates interleaved gate drive signals, monitors per-phase current via DCR or shunt sensing, and enforces voltage accuracy, overcurrent protection, and Power-Good signaling - all critical for stable ISL95816IRZ-based VR operation.
Does the ISL95816IRZ support both DCR and resistor-based current sensing?
Yes, the ISL95816IRZ supports dual current sensing modes: lossless inductor DCR sensing with single NTC thermistor compensation for temperature drift correction, and precision resistor (shunt) sensing for higher accuracy where DCR tolerance or layout parasitics are concerns. Both methods are selectable via configuration resistors and validated in the ISL95816IRZ reference design.
What is the significance of R3 Technology™ in the ISL95816IRZ?
R3 Technology™ is Intersil's proprietary modulator architecture used in the ISL95816IRZ that enables variable switching frequency during load transients and automatic frequency reduction at light load. This delivers faster transient response (<50 mV deviation on 10–90 A step) and improved light-load efficiency versus fixed-frequency controllers - a key differentiator in the ISL95816IRZ's performance profile.
Can the ISL95816IRZ be configured for fewer than four phases?
Yes, the ISL95816IRZ is fully configurable for 1-, 2-, 3-, or 4-phase operation via external resistor programming and pin strapping. Phase count is determined at power-up and remains fixed during runtime. This flexibility allows designers to reuse the same ISL95816IRZ across multiple platforms with varying CPU TDP requirements without changing the controller IC.
How does the ISL95816IRZ achieve 0.5% system voltage accuracy?
The ISL95816IRZ achieves ±0.5% system accuracy over temperature through a combination of trimmed internal reference, differential remote voltage sensing (VSENSE+/VSENSE–), and on-die calibration circuitry. This specification is verified across –40°C to +125°C junction temperature and includes contributions from sensing path, DAC, and error amplifier - ensuring consistent ISL95816IRZ regulation performance in demanding thermal environments.
ISL95816IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5
- Voltage - Input:
- 4.5V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95816IRZ FAQ
1.How can I place an order for ISL95816IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95816IRZ 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 ISL95816IRZ reliable?
The price and inventory of ISL95816IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95816IRZ is usually 5 days.
3.What payment methods are accepted for ISL95816IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95816IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95816IRZ?
ISL95816IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95816IRZ 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 ISL95816IRZ?
For technical support, including ISL95816IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95816IRZ requirements.
6.How does Aetrix verify that ISL95816IRZ is sourced from the original manufacturer or authorized distributors?
All ISL95816IRZ 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 ISL95816IRZ meets industry standards.
7.What is the process for return or replacement of ISL95816IRZ?
All ISL95816IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95816IRZ, 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 ISL95816IRZ part is unused and in its original packaging.
Return procedure for ISL95816IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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