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Renesas ISL6376IRZ-TK
- Part No.:
- ISL6376IRZ-TK
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6376IRZ-TK.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,751
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Product details
Overview
ISL6376IRZ-TK from Renesas (formerly Intersil) is a hybrid digital 6-phase PWM controller designed for Intel VR12.5/VR12-compliant microprocessor core and memory voltage regulation. It delivers ±0.5% closed-loop system accuracy, supports up to 2MHz per phase switching, implements EAPP modulation, and enables auto phase shedding with PSI#-driven 1-/2-phase low-power modes for high light-load efficiency in server and desktop CPU power delivery.
For engineers reviewing the ISL6376IRZ-TK datasheet, ISL6376IRZ-TK pinout, ISL6376IRZ-TK application, or ISL6376IRZ-TK equivalent, key selection considerations include VR12.5 SVID compliance, EAPP transient response performance, droop control via IMON/FB current sensing, thermal compensation via TM pin, and SMBus/PMBus programmability without NVM or firmware.
Technical Context
The ISL6376IRZ-TK implements a hybrid digital architecture combining analog control loops with digital configuration via SMBus/PMBus/I²C - fully conflict-free with CPU SVID bus. It uses proprietary Enhanced Active Pulse Positioning (EAPP) modulation to achieve fast load transient response while maintaining evenly distributed PWM pulses across phases.
It supports dynamic VID slew rate control with DVC, precision droop programming via resistor or DCR current sensing, and integrated thermal monitoring using an NTC thermistor on the TM pin. Protection includes true catastrophic failure protection (CFP), average overcurrent, per-phase current limiting, and output voltage open-sense detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–6-phase operation with phase doubler support for scalable CPU core/mem power stages. |
| Voltage Regulation Compliance | Fully compliant with Intel VR12.5 and VR12 specifications including SerialVID, IMAX/TMAX registers, and PSI# signaling. |
| System Accuracy | ±0.5% closed-loop output voltage accuracy over full load, line, and temperature range - critical for tight CPU VDD tolerance. |
| Switching Frequency | Up to 2MHz per phase - enables smaller magnetics and faster transient response in space-constrained VRMs. |
| Current Sensing Method | Differential sensing via dedicated resistor or inductor DCR; enables accurate droop control, channel balancing, and OCP without external amplifiers. |
| Thermal Monitoring | Integrated digitized NTC thermistor interface on TM pin with automatic current-sense compensation for thermal drift. |
| Interface Protocol | SMBus/PMBus/I²C with SVID bus conflict avoidance - allows coexistence with CPU telemetry without arbitration issues. |
Pinout & Package
ISL6376IRZ-TK is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL6376 datasheet Rev 0.00 (FN8298), with dedicated pins for phase control, current sensing (IMON, FB), thermal monitoring (TM), SVID/SMBus communication (SCL, SDA, SVI_CLK, SVI_DATA), and enable sequencing (EN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IMON | Current monitor output | Provides analog current sense signal to CPU for real-time IOUT reporting and PSI# generation. |
| FB | Feedback input | Accepts precision droop voltage developed across feedback resistor; enables load-line regulation per VR12.5 spec. |
| TM | Thermistor input | Connects to NTC thermistor for digitized temperature readback and automatic current-sense offset compensation. |
| SVI_CLK / SVI_DATA | SVID bus interface | Two-wire SVID interface for VID code, PSI#, and telemetry exchange - electrically isolated from SMBus lines. |
| EN | Enable input | Threshold-sensitive logic input for precise power-rail coordination during system startup and sequencing. |
| PHASE[0:5] | Phase gate drive outputs | 6 independent high-speed gate drivers supporting external high-side MOSFETs in multiphase buck topology. |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation Scheme | Proprietary pulse positioning enables sub-100ns transient response with reduced output capacitance and improved phase current balance. |
| Auto Phase Shedding | Dynamically reduces active phases (to 1 or 2) under light load using PSI# signals - cuts core and switching losses without sacrificing heavy-load performance. |
| Droop Control Architecture | Supports both precision resistor and DCR-based current sensing with programmable load-line slope - ensures stable CPU VDD droop per VR12.5 specification. |
| SVID/SMBus Coexistence | Dual-bus design isolates SVID (CPU-facing) and SMBus/PMBus (system management-facing) to prevent bus contention during telemetry reads/writes. |
| True Catastrophic Failure Protection | Hardware-level shutdown triggered by simultaneous overvoltage, overcurrent, and thermal faults - prevents damage during hard shorts or MOSFET failures. |
Applications
| Server CPU Core VRM | Desktop High-Performance CPU VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors under dynamic workloads including AI inference and virtualization. IC Role / Device Role / Timing Role: Primary 6-phase PWM controller managing gate drive timing, current sharing, droop, and SVID telemetry exchange with CPU. Use Value: EAPP modulation and auto phase shedding maintain >90% efficiency from 5% to 100% load while meeting ±5mV VDD tolerance at 1.8V. | Use Scenario: Powering overclocked Core i9 processors in gaming motherboards with aggressive load transients during benchmarking. IC Role / Device Role / Timing Role: Hybrid digital controller executing dynamic VID updates, PSI#-based phase scaling, and real-time current reporting via IMON. Use Value: ±0.5% system accuracy and 2MHz per-phase switching enable stable 5.2GHz operation with <100mV undershoot during 10A/µs load steps. |
| DDR4/DDR5 Memory VRM | Workstation GPU Core Power |
Use Scenario: Delivering tightly regulated VDDQ/VPP for DDR4/DDR5 modules in high-bandwidth memory subsystems. IC Role / Device Role / Timing Role: VR12.5-compliant controller implementing memory-specific VID tables, droop profiles, and thermal derating via TM pin. Use Value: Differential remote sensing and DCR current sensing eliminate ground bounce errors, ensuring <±3mV regulation at 1.2V/40A. | Use Scenario: Supplying GPU core voltage in professional workstation graphics cards with multi-rail thermal constraints. IC Role / Device Role / Timing Role: Multi-phase controller coordinating with GPU's PMBus interface for adaptive voltage/frequency scaling and thermal throttling. Use Value: Integrated thermal compensation on TM pin maintains current-sense accuracy across -40°C to +125°C junction, preventing false OCP trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6377IRZ-TK | Same pinout and feature set; adds enhanced DVC for faster dynamic VID transitions and improved PSI# timing resolution. | Better suited for next-gen CPUs requiring tighter VID slew control during turbo boost transitions. | Select ISL6377IRZ-TK when dynamic VID compensation and sub-50ns PSI latency are required. |
| RT8803AZSP | 6-phase controller with VR12.5 support but no EAPP; uses conventional COT control and lacks integrated thermal compensation on current sense. | Lower BOM cost but requires external thermal compensation circuitry and delivers slower transient response than ISL6376IRZ-TK. | Choose RT8803AZSP only for cost-sensitive designs where EAPP-level transient performance is not mandatory. |
Compared with ISL6376IRZ-TK, ISL6377IRZ-TK offers refined dynamic VID handling for newer CPU microarchitectures, while RT8803AZSP provides basic VR12.5 compliance at lower complexity but sacrifices EAPP-enabled transient speed and integrated thermal accuracy - making ISL6376IRZ-TK optimal for balanced performance, efficiency, and design simplicity in mainstream server/desktop VRMs.
Availability
ISL6376IRZ-TK is available at Aetrix Electronics and suitable for server CPU core VRMs, desktop high-performance CPU VRMs, and DDR4/DDR5 memory regulator applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6376IRZ-TK 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL6376IRZ-TK belongs to Renesas' high-performance digital power management portfolio, engineered specifically for Intel VR12.5/VR12-compliant CPU and memory voltage regulation with emphasis on efficiency scalability, transient fidelity, and system-level telemetry integration.
FAQ
What is the primary function of the ISL6376IRZ-TK in a CPU power delivery system?
The ISL6376IRZ-TK serves as a hybrid digital 6-phase PWM controller that regulates core or memory voltage for Intel VR12.5/VR12-compliant microprocessors. It executes droop control, phase shedding, SVID communication, and real-time current monitoring - all while maintaining ±0.5% system accuracy. Its EAPP modulation and auto-phase management make ISL6376IRZ-TK essential for balancing efficiency and transient response in modern CPU VRMs.
Does the ISL6376IRZ-TK require external NVM or firmware to operate?
No, the ISL6376IRZ-TK operates without external NVM or firmware due to its hybrid digital architecture. Configuration is handled via SMBus/PMBus/I²C or SVID interface using registers like IMAX, TMAX, and ADDRESS OFFSET. This eliminates firmware development overhead and reduces BOM cost - a key differentiator of ISL6376IRZ-TK versus full-digital controllers.
How does the ISL6376IRZ-TK implement thermal compensation for current sensing?
The ISL6376IRZ-TK uses the TM pin to interface with an external NTC thermistor. Internal circuitry digitizes the thermistor voltage and applies real-time correction to current-sense amplifier offsets, ensuring consistent droop and OCP accuracy across -40°C to +125°C. This integrated thermal compensation is a built-in feature of ISL6376IRZ-TK and requires no external calibration components.
Can the ISL6376IRZ-TK be used for DDR5 memory voltage regulation?
Yes, the ISL6376IRZ-TK supports VR12.5 core and VR12/VR12.5 memory specifications, including programmable VID tables and droop profiles tailored for DDR4/DDR5 VDDQ and VPP rails. Its differential remote sensing, DCR current sensing, and SVID compatibility make ISL6376IRZ-TK suitable for high-accuracy, low-noise memory VRMs in servers and workstations.
What protection features are integrated into the ISL6376IRZ-TK?
The ISL6376IRZ-TK integrates True Catastrophic Failure Protection (CFP), average overcurrent protection, per-phase current limiting, output voltage open-sense detection, and programmable protection disable. These hardware-based safeguards respond within nanoseconds to faults such as short circuits, overtemperature, or overvoltage - ensuring robust system reliability without software dependency. All protections apply directly to ISL6376IRZ-TK's internal monitoring paths.
ISL6376IRZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12, VR12.5
- Voltage - Input:
- 4.75V ~ 5.25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.25V ~ 3.04V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6376IRZ-TK FAQ
1.How can I place an order for ISL6376IRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6376IRZ-TK 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 ISL6376IRZ-TK reliable?
The price and inventory of ISL6376IRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6376IRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6376IRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6376IRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6376IRZ-TK?
ISL6376IRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6376IRZ-TK 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 ISL6376IRZ-TK?
For technical support, including ISL6376IRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6376IRZ-TK requirements.
6.How does Aetrix verify that ISL6376IRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6376IRZ-TK 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 ISL6376IRZ-TK meets industry standards.
7.What is the process for return or replacement of ISL6376IRZ-TK?
All ISL6376IRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6376IRZ-TK, 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 ISL6376IRZ-TK part is unused and in its original packaging.
Return procedure for ISL6376IRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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