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Renesas ISL6376IRZ-T
- Part No.:
- ISL6376IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6376IRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,160
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Product details
Overview
ISL6376IRZ-T 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, implements EAPP modulation, and enables auto phase shedding with PSI1/PSI2/PSI3 low-power modes for high light-load efficiency in server and desktop CPU power delivery.
For engineers reviewing the ISL6376IRZ-T datasheet, ISL6376IRZ-T pinout, ISL6376IRZ-T application, or ISL6376IRZ-T equivalent, key selection criteria include VR12.5 SVID compliance, droop control via FB/IMON, differential remote sensing, thermal compensation via TM pin, and programmable phase shedding behavior across load transients.
Technical Context
The ISL6376IRZ-T implements Intersil's patented Enhanced Active Pulse Positioning (EAPP) modulation to achieve fast transient response without requiring NVM or firmware. It uses SMBus/PMBus/I²C for configuration and telemetry while remaining conflict-free with CPU SVID bus communication.
It supports precision current sensing via dedicated resistor or DCR, enabling accurate droop programming, channel-current balancing, and average overcurrent protection. Thermal monitoring is performed via TM pin with integrated NTC digitization and current-sense compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–6-phase operation with phase doubler support for scalable CPU VR design |
| Output Accuracy | ±0.5% closed-loop system accuracy over load, line, and temperature for tight VOUT regulation |
| Switching Frequency | Up to 2MHz per phase, enabling smaller magnetics and improved transient response |
| Current Sensing | Differential sensing via external resistor or inductor DCR, with integrated programmable gain for droop and OCP |
| Interface Protocol | SMBus/PMBus/I²C with SVID bus conflict avoidance-enables simultaneous CPU and controller communication |
| Low-Power Modes | PSI1 (1- or 2-phase), PSI2/PSI3 (single-phase + diode emulation) for >90% efficiency at light load |
| Protection Features | True Catastrophic Failure Protection (CFP), average OCP, per-phase current limit, open-sense detection |
Pinout & Package
ISL6376IRZ-T 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 (May 2013), with dedicated IMON, FB, TM, and SVID interface pins supporting full VR12.5 compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Input | Connects to output divider; senses VOUT for droop control via current-dependent voltage drop |
| IMON | Current Monitor Output | Reports sensed load current to CPU via IOUT register; enables PSI# signaling and phase shedding |
| TM | Thermal Monitor Input | Accepts NTC thermistor voltage; digitized internally for thermal compensation of current sense elements |
| SCL, SDA | SMBus Interface | Enable configuration and telemetry via PMBus/I²C; operate conflict-free alongside CPU SVID bus |
| EN | Enable Input | Threshold-sensitive logic input for precise power-rail sequencing coordination during startup |
| VDDIO | I/O Supply | Provides 3.3V bias for interface and logic circuits; independent from main VDD supply |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation | Patented pulse positioning scheme delivering faster transient response with fewer bulk capacitors and no NVM/firmware overhead |
| Auto Phase Shedding | Dynamic reduction from 6→2→1 phase based on PSI# signals, reducing core and switching losses without sacrificing heavy-load performance |
| Droop Control Architecture | Uses FB pin current sink to generate precision load-line voltage offset proportional to sensed IMON current |
| DCR/Resistor Current Sensing | Supports both discrete sense resistors and inductor DCR, with internal gain programming for consistent accuracy across topologies |
| True CFP Protection | Dedicated hardware-level fault detection that shuts down all phases within 100ns upon catastrophic failure (e.g., shorted FET) |
Applications
| Server CPU Voltage Regulator | Desktop High-Performance CPU VR |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon processors under dynamic workloads including virtualization and AI inference. IC Role / Device Role / Timing Role: Primary 6-phase PWM controller coordinating gate drivers, current sensing, and SVID communication with CPU. Use Value: Enables VR12.5 compliance, <1% load-line deviation, and automatic phase shedding to maintain >85% efficiency from 5% to 100% load. | Use Scenario: Powering overclocked Core i9 processors in gaming motherboards with aggressive transient demands. IC Role / Device Role / Timing Role: Hybrid digital controller managing VID updates, droop slope, and PSI-mode transitions via SVID. Use Value: Delivers sub-100ns transient recovery and programmable DVC slew rate to stabilize VOUT during rapid frequency scaling. |
| DDR Memory VR Module | Workstation GPU Core VR |
Use Scenario: Providing tightly regulated 1.2V DDR4/DDR5 memory rail with thermal-aware current limiting. IC Role / Device Role / Timing Role: VR12/VR12.5-compliant controller using DCR sensing and TM-based thermal compensation. Use Value: Maintains ±0.5% output accuracy across -40°C to +125°C ambient while preventing thermal runaway during sustained bandwidth loads. | Use Scenario: Delivering stable core voltage to high-TDP GPUs (e.g., NVIDIA A100, AMD MI300) in compute-accelerated workstations. IC Role / Device Role / Timing Role: Multi-phase controller implementing diode emulation and per-phase current limiting for asymmetric load distribution. Use Value: Achieves >92% peak efficiency and supports start-up into pre-charged loads-critical for hot-pluggable GPU modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Full digital PWM with PMBus 1.2, requires firmware; lacks EAPP modulation and SVID conflict-free design | Targets VR12/VR12.5 but mandates separate SVID arbitration logic; no native PSI# integration | Choose when full telemetry logging and firmware-updatable parameters are required over analog-digital hybrid simplicity |
| TPS53689RTAR | Analog-based 6-phase controller with D-CAP+ control; no SMBus/PMBus, no SVID interface, no PSI mode support | Designed for cost-sensitive VR12 systems without CPU telemetry exchange or dynamic phase shedding | Choose when SVID communication and auto phase shedding are not needed, and lower BOM cost is prioritized |
Compared with IR35201MTRPBF and TPS53689RTAR, the ISL6376IRZ-T uniquely combines VR12.5 SVID compatibility, EAPP modulation, and hardware-based PSI-aware phase shedding-enabling tighter regulation, faster transients, and higher light-load efficiency without firmware dependency.
Availability
ISL6376IRZ-T is available at Aetrix Electronics and suitable for server CPU voltage regulation, high-end desktop VRMs, DDR memory power delivery, and workstation GPU core supplies requiring stable component supply and long-term industrial availability.
Supply support for ISL6376IRZ-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 Corporation acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio with ISO 9001-certified manufacturing.
The ISL6376IRZ-T belongs to Renesas' EAPP Hybrid Digital PWM Controller product line, engineered specifically for Intel VR12.5/VR12-compliant CPU and memory voltage regulation with emphasis on transient performance, light-load efficiency, and SVID interoperability.
FAQ
What is the primary function of the ISL6376IRZ-T in a CPU power delivery system?
The ISL6376IRZ-T serves as a hybrid digital 6-phase PWM controller that regulates microprocessor core or memory voltage per Intel VR12.5/VR12 specifications. It manages phase activation, droop control via FB/IMON, SVID communication with the CPU, and automatic phase shedding during PSI modes. Its EAPP modulation ensures fast transient response, making the ISL6376IRZ-T essential for maintaining stable VOUT under dynamic CPU load changes.
Does the ISL6376IRZ-T require firmware or NVM to operate?
No, the ISL6376IRZ-T operates without firmware or non-volatile memory thanks to its hybrid digital architecture and patented EAPP modulation. Configuration is handled via SMBus/PMBus/I²C registers, and all critical functions-including phase shedding, droop slope, and thermal compensation-are implemented in analog/digital hardware. This eliminates firmware development overhead and reduces validation time for the ISL6376IRZ-T in production designs.
How does the ISL6376IRZ-T support Intel's PSI# power-saving protocol?
The ISL6376IRZ-T directly interprets PSI# signals from the CPU over the SVID bus to enter defined low-power states: PSI1 (1- or 2-phase), PSI2/PSI3 (single-phase with diode emulation). It dynamically sheds or adds phases while maintaining regulation accuracy and transient readiness. This hardware-level PSI# response-without software intervention-is a core feature of the ISL6376IRZ-T and enables >90% efficiency at light loads in compliant platforms.
Can the ISL6376IRZ-T be used with both resistor-based and DCR-based current sensing?
Yes, the ISL6376IRZ-T supports both precision external current sense resistors and inductor DCR sensing through differential inputs. Its current sensing circuitry includes programmable gain and offset calibration to ensure consistent accuracy across both methods. This flexibility allows designers to optimize BOM cost and board space while maintaining ±0.5% system accuracy-key for reliable operation of the ISL6376IRZ-T in diverse VRM topologies.
What protection features are integrated into the ISL6376IRZ-T?
The ISL6376IRZ-T integrates True Catastrophic Failure Protection (CFP), average overcurrent protection, per-phase current limiting, output voltage open-sense detection, and thermal shutdown with NTC-based compensation. CFP triggers full-phase shutdown within 100ns of detecting a hard fault, while IMON-based precision OCP provides accurate current monitoring. These protections are fully hardware-implemented and do not rely on firmware, ensuring robust safety for the ISL6376IRZ-T in mission-critical power systems.
ISL6376IRZ-T 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 (6x6)
ISL6376IRZ-T FAQ
1.How can I place an order for ISL6376IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6376IRZ-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 ISL6376IRZ-T reliable?
The price and inventory of ISL6376IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6376IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6376IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6376IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6376IRZ-T?
ISL6376IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6376IRZ-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 ISL6376IRZ-T?
For technical support, including ISL6376IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6376IRZ-T requirements.
6.How does Aetrix verify that ISL6376IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6376IRZ-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 ISL6376IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6376IRZ-T?
All ISL6376IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6376IRZ-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 ISL6376IRZ-T part is unused and in its original packaging.
Return procedure for ISL6376IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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