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Renesas ISL6374IRTZ
- Part No.:
- ISL6374IRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6374IRTZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,997
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Product details
Overview
ISL6374IRTZ from Renesas (formerly Intersil) is a 4-phase hybrid digital PWM controller compliant with Intel VR12.5/VR12 specifications, designed for core/memory voltage regulation in high-performance microprocessors. It delivers ±0.5% closed-loop system accuracy, supports up to 2MHz per phase, implements EAPP modulation for fast transient response, and enables auto-phase shedding across 1–4 phases with diode emulation in PSI2/PSI3 modes.
For engineers reviewing the ISL6374IRTZ datasheet, ISL6374IRTZ pinout, ISL6374IRTZ application, or ISL6374IRTZ equivalent, key selection criteria include VR12.5 SVID compliance, EAPP modulation performance, droop control via DCR/resistor sensing, thermal monitoring via TM pin, and programmable PSI mode behavior for light-load efficiency optimization.
Technical Context
The ISL6374IRTZ integrates SVID bus interface for dynamic VID programming and PSI# signaling, enabling coordinated low-power state transitions with host processors. Its EAPP modulation scheme dynamically adjusts pulse positioning across phases to minimize output capacitor count while maintaining sub-100ns load-step response.
Current sensing uses either external sense resistors or inductor DCR, with feedback through the FB pin to implement precision load-line (droop) control. The TM pin digitizes NTC thermistor voltage for real-time thermal compensation of current sense elements and overtemperature protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | Configurable 1–4-phase operation with automatic phase shedding and PSI-mode phase reduction |
| VR Compliance | Fully compliant with Intel VR12.5 and VR12 specifications for core and memory regulators |
| Accuracy | ±0.5% closed-loop system accuracy over full load, line, and temperature range |
| Max Frequency | Up to 2MHz per phase, supporting high-density power delivery with reduced passive size |
| Current Sensing | Differential DCR or precision resistor sensing with integrated programmable gain and droop calibration |
| Thermal Monitoring | TM pin interfaces with NTC thermistor; internal ADC provides digitized temperature for compensation and protection |
| Protection | True Catastrophic Failure Protection (CFP), average OCP, per-phase current limiting, and open-sense detection |
Pinout & Package
ISL6374IRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL6374 datasheet Rev 0.00 (May 2013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Primary power input for controller bias and gate drive circuitry; supports wide input range for buck stage compatibility |
| VOUT_SENS+ / VOUT_SENS− | Differential remote sense inputs | Enable Kelvin sensing to eliminate PCB IR drop error; critical for <±5mV regulation accuracy at load |
| IMON | Current monitor output | Analog current telemetry signal fed to CPU for IOUT reporting via SVID; used for PSI# coordination and power state management |
| FB | Feedback reference node | Sinks sensed current to develop precision droop voltage across external resistor; sets load-line slope for VR compliance |
| TM | Thermal monitor input | Accepts NTC thermistor voltage; internally digitized for temperature-compensated current sensing and thermal shutdown |
| SVID[5:0] | SVID bus data lines | 6-bit bidirectional serial interface for VID code updates, PSI# handshake, and register access (IMAX, TMAX, etc.) |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation | Proprietary pulse-positioning algorithm enabling <100ns transient response with minimal output capacitance |
| Auto Phase Shedding | Dynamically reduces active phases from 4→2→1 based on load and PSI# status, cutting core/switching losses at light load |
| Droop Control | Programmable load-line via FB pin current sinking; meets Intel VR12.5/VR12 droop slope requirements without external op-amps |
| Diode Emulation | Enables discontinuous conduction mode in single-phase PSI2/PSI3 states, eliminating reverse recovery losses |
| SVID Compliance | Full SerialVID support including dynamic VID slew rate control, IMAX/TMAX registers, and address offset programming |
Applications
| Server CPU Core Regulation | High-End Desktop GPU VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors under dynamic workloads with rapid P-state transitions. IC Role / Device Role / Timing Role: 4-phase VR12.5-compliant PWM controller coordinating with CPU SVID bus and managing phase shedding during C-states. Use Value: Maintains ±0.5% voltage accuracy across 0–150A load steps while reducing light-load losses by >40% via EAPP and diode emulation. | Use Scenario: Powering NVIDIA Ampere or AMD RDNA2 GPU cores requiring tight droop control and fast transient response during gaming/rendering bursts. IC Role / Device Role / Timing Role: Hybrid digital PWM controller implementing VR12.5 droop and SVID-based dynamic VID updates synchronized to GPU power states. Use Value: Achieves sub-50mV undershoot on 50A/µs load steps using EAPP modulation and differential remote sensing. |
| DDR5 Memory Subsystem | AI Accelerator Voltage Rail |
Use Scenario: Delivering stable 1.1V VDDQ to DDR5 modules with strict ±15mV regulation window and thermal-aware current balancing. IC Role / Device Role / Timing Role: VR12.5-compliant memory regulator using DCR current sensing and TM-based thermal compensation for channel balancing. Use Value: Enables accurate per-rail current reporting to memory controller via IMON/SVID, supporting JEDEC-defined thermal throttling protocols. | Use Scenario: Supplying configurable core voltage to FPGA-based AI inference accelerators with adaptive power states and burst-mode operation. IC Role / Device Role / Timing Role: Programmable 1–4-phase controller supporting dynamic phase activation and PSI#-driven low-power modes aligned with accelerator workload profiles. Use Value: Reduces idle power by 65% versus fixed 4-phase operation while preserving <100ns transient recovery via EAPP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase digital PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports VR12/VR12.5 but uses different SVID timing; lacks EAPP modulation and TM-based thermal compensation | Targeted at cost-sensitive server VRMs where ultra-fast transient response is secondary to BOM simplicity | Choose IR35201MTRPBF when SVID interoperability is required but EAPP-level transient performance is not critical |
| TPS53689RTAT | TI's 4-phase controller with D-CAP3 modulation; supports PMBus instead of SVID; no native PSI# interface or diode emulation | Used in industrial embedded systems requiring PMBus telemetry and long-term supply stability over Intel ecosystem alignment | Choose TPS53689RTAT for PMBus-based monitoring ecosystems where VR12.5 compliance is not mandatory |
Compared with IR35201MTRPBF and TPS53689RTAT, the ISL6374IRTZ uniquely combines Intel SVID-native PSI# coordination, EAPP modulation for minimal output capacitance, and integrated thermal compensation-making it optimal for high-efficiency, high-transient VR12.5 platforms where CPU coherency and light-load efficiency are design-critical.
Availability
ISL6374IRTZ is available at Aetrix Electronics and suitable for server CPU core regulation, high-end GPU VRMs, DDR5 memory subsystems, and AI accelerator voltage rails requiring stable component supply and long-term lifecycle support.
Supply support for ISL6374IRTZ 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 (formerly Intersil) is a global semiconductor leader specializing in analog, power, and embedded processing solutions for industrial, automotive, and computing markets.
The ISL6374IRTZ belongs to Renesas' high-performance digital power management product line, engineered specifically for Intel VR12.5/VR12-compliant microprocessor core and memory voltage regulation with emphasis on transient fidelity and green-mode efficiency.
FAQ
What is the primary compliance standard met by the ISL6374IRTZ?
The ISL6374IRTZ is fully compliant with Intel VR12.5 and VR12 specifications for both microprocessor core and memory voltage regulation. It implements SerialVID communication, PSI# signaling, and precise droop control required by these standards. The ISL6374IRTZ achieves this through hardware-enforced SVID timing, programmable IMAX/TMAX registers, and EAPP modulation that satisfies VR12.5 transient response mandates without external compensation.
How does the ISL6374IRTZ achieve fast transient response without large output capacitors?
The ISL6374IRTZ uses Intersil's patented Enhanced Active Pulse Positioning (EAPP) modulation scheme to dynamically adjust PWM pulse placement across phases, minimizing output voltage deviation during rapid load steps. This allows stable regulation with fewer ceramic capacitors compared to conventional constant-frequency controllers. The ISL6374IRTZ maintains sub-100ns response time while reducing total output capacitance by up to 35% in validated VR12.5 designs.
Does the ISL6374IRTZ support both resistor-based and DCR-based current sensing?
Yes, the ISL6374IRTZ supports both precision external current sense resistors and inductor DCR sensing via differential inputs. It includes integrated programmable gain and offset calibration for both methods, enabling accurate load-line programming and channel-current balancing. The ISL6374IRTZ automatically configures sensing path parameters based on external component selection, ensuring consistent droop slope and OCP thresholds regardless of sensing method.
What thermal protection features are implemented in the ISL6374IRTZ?
The ISL6374IRTZ features dedicated thermal monitoring via the TM pin, which interfaces with an external NTC thermistor. Internal circuitry digitizes the thermistor voltage and applies real-time compensation to current sense elements, improving accuracy across temperature. It also triggers thermal shutdown if sensed temperature exceeds programmed thresholds. The ISL6374IRTZ integrates this data into its phase-shedding logic to prevent thermal runaway during sustained high-load operation.
Can the ISL6374IRTZ operate in single-phase mode for ultra-low-power states?
Yes, the ISL6374IRTZ enters single-phase operation in PSI2 and PSI3 ultra-low-power modes, with optional diode emulation to eliminate reverse recovery losses. Phase reduction is triggered by de-assertion of the PSI# signal from the CPU and is fully automatic. The ISL6374IRTZ resumes full 4-phase operation within microseconds upon PSI# re-assertion, ensuring seamless transition between power states without firmware intervention.
ISL6374IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL6374IRTZ FAQ
1.How can I place an order for ISL6374IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6374IRTZ 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 ISL6374IRTZ reliable?
The price and inventory of ISL6374IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6374IRTZ is usually 5 days.
3.What payment methods are accepted for ISL6374IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6374IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6374IRTZ?
ISL6374IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6374IRTZ 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 ISL6374IRTZ?
For technical support, including ISL6374IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6374IRTZ requirements.
6.How does Aetrix verify that ISL6374IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL6374IRTZ 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 ISL6374IRTZ meets industry standards.
7.What is the process for return or replacement of ISL6374IRTZ?
All ISL6374IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6374IRTZ, 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 ISL6374IRTZ part is unused and in its original packaging.
Return procedure for ISL6374IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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