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Renesas ISL6374IRTZ-T
- Part No.:
- ISL6374IRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6374IRTZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
ISL6374IRTZ-T 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 switching, implements EAPP modulation for fast transient response, and enables auto phase shedding across PSI1/PSI2/PSI3 low-power modes.
For engineers reviewing the ISL6374IRTZ-T datasheet, ISL6374IRTZ-T pinout, ISL6374IRTZ-T application, or ISL6374IRTZ-T equivalent, key selection considerations include VR12.5 SVID compliance, droop control via DCR/resistor sensing, IMON-based current reporting, thermal compensation via TM pin, and programmable phase shedding behavior during PSI# assertion.
Technical Context
The ISL6374IRTZ-T implements Intersil's patented Enhanced Active Pulse Positioning (EAPP) modulation to minimize output capacitor count while maintaining sub-100ns load-step response. It uses differential remote sensing to eliminate ground offset errors and integrates NVM-free firmware for VR12.5 SerialVID communication including IMAX, TMAX, BOOT, and ADDRESS OFFSET register programming.
Current sensing is performed via precision resistor or inductor DCR, feeding FB for droop control and enabling channel-current balancing, average overcurrent protection, and individual phase limiting. Thermal monitoring occurs through an NTC thermistor on the TM pin, with digitized temperature used for real-time current-sense compensation and thermal shutdown coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–4-phase operation with phase doubler support for scalable power delivery. |
| VR Compliance | Fully compliant with Intel VR12.5 and VR12 specifications, including SVID bus interface and PSI# signaling. |
| Accuracy | ±0.5% closed-loop system accuracy over line, load, and temperature - critical for CPU core voltage tolerance. |
| Switching Frequency | Up to 2MHz per phase - enables compact magnetics and high-density PCB layout. |
| Current Sensing | Differential DCR or discrete resistor sensing with integrated programmable gain - supports accurate droop and IOUT reporting. |
| Thermal Monitoring | TM pin accepts NTC thermistor input with internal ADC and compensation logic - ensures stable current sense under thermal drift. |
| Protection Features | True Catastrophic Failure Protection (CFP), average OCP, per-phase current limit, open-sense detection, and configurable disable option. |
Pinout & Package
ISL6374IRTZ-T is housed in a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the ISL6374 datasheet Rev 0.00 (May 2013), with dedicated SVID, IMON, FB, TM, EN, and phase-driver outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V or 12V bias for internal LDOs and gate drivers - powers controller core and high-side drivers. |
| FB | Feedback input | Measures regulated output voltage; combined with current-sense signal to implement precision droop control. |
| IMON | Current monitor output | Reports sensed load current to CPU via SVID IOUT register - enables dynamic phase management and power state coordination. |
| TM | Thermal monitor input | Connects to NTC thermistor - digitized temperature feeds thermal compensation and overtemperature protection. |
| PSI# | Power state indicator input | Active-low signal from CPU indicating entry into PSI1/PSI2/PSI3 states - triggers automatic phase shedding and diode emulation. |
| SVID Bus Pins (SCLK, SDATA) | Serial VID interface | Two-wire SVID bus for bidirectional communication with CPU - programs VR parameters and reads telemetry. |
| EN | Enable input | Threshold-sensitive enable pin - coordinates startup timing with other rails to prevent sequencing violations. |
| PHASEx_OUT (x=1–4) | Gate drive outputs | Four independent high/low-side gate driver outputs - directly drive external MOSFETs in multiphase buck topology. |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation | Proprietary pulse positioning scheme reduces output capacitance requirement by >30% while maintaining <100ns transient recovery. |
| Auto Phase Shedding | Hardware-managed transition between 1-, 2-, and 4-phase operation based on PSI# status - improves light-load efficiency without firmware. |
| Droop Control Architecture | Combined FB + current-sense feedback enables precise load-line programming - meets Intel VR12.5 VOUT vs. IOUT slope requirements. |
| Diode Emulation Mode | Enables discontinuous conduction mode in PSI2/PSI3 - eliminates reverse recovery losses and boosts sub-1A efficiency by 8–12%. |
| Integrated Thermal Compensation | Digitized NTC reading adjusts current-sense gain in real time - maintains ±1.5% current measurement accuracy from –40°C to +125°C. |
Applications
| Server CPU Core Regulation | High-End Desktop GPU VRM |
|---|---|
Use Scenario: Regulating 0.8–1.5V core voltage for dual-socket Xeon Scalable processors under dynamic 200A+ load steps. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller coordinating with SVID host for real-time VID updates and phase shedding. Use Value: EAPP modulation and droop control ensure <5mV deviation during 100A/µs transients while meeting VR12.5 ±0.5% accuracy spec. | Use Scenario: Powering PCIe Gen5 graphics cards with adaptive memory and compute rail sequencing. IC Role / Device Role / Timing Role: Hybrid digital controller managing both GPU core and GDDR6 memory rails via dual SVID channels. Use Value: Auto phase shedding and diode emulation maintain >90% efficiency at 5% load, extending thermal headroom in compact GPU modules. |
| AI Accelerator Board Power | Network ASIC Voltage Regulation |
Use Scenario: Delivering tightly regulated 0.75V@300A to FPGA-based AI inference accelerators with burst-mode workloads. IC Role / Device Role / Timing Role: High-bandwidth PWM controller using DCR sensing and remote sensing to reject board-level noise during 150A load steps. Use Value: ±0.5% system accuracy and TM-based thermal compensation guarantee stable operation across 0–85°C ambient with no calibration. | Use Scenario: Supplying 1.0V core rail to multi-core network processors in telecom line cards with strict ripple and sequencing requirements. IC Role / Device Role / Timing Role: VR12.5-compliant controller implementing start-up into pre-charged load and output voltage open-sense protection. Use Value: True Catastrophic Failure Protection (CFP) and per-phase current limiting prevent single-point failures during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase digital PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports VR12/VR12.5 but lacks EAPP modulation; uses standard D-CAP3 control with slower transient response. | Requires larger output capacitance for same transient spec; no integrated thermal compensation on current sense. | Preferred where cost sensitivity outweighs ultra-fast transient needs and thermal drift is minimal. |
| TPS53679RSLR | TI's CSD-compatible controller with PMBus interface instead of SVID; supports up to 6 phases and adaptive voltage positioning. | Designed for AMD EPYC and newer Intel platforms requiring PMBus telemetry; not SVID-native. | Select when system uses PMBus host controller or requires >4-phase scalability beyond ISL6374IRTZ-T's 4-phase limit. |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6374IRTZ-T uniquely combines VR12.5 SVID compliance, EAPP modulation, and hardware-based auto phase shedding - delivering superior light-load efficiency and transient performance in Intel-centric server and desktop platforms without firmware dependency.
Availability
ISL6374IRTZ-T is available at Aetrix Electronics and suitable for server CPU core regulation, high-end GPU VRMs, AI accelerator board power, and network ASIC voltage regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6374IRTZ-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. Intersil was known for innovation in digital power controllers and precision analog ICs.
The ISL6374IRTZ-T belongs to Intersil's EAPP Hybrid Digital PWM Controller product line, engineered specifically for Intel VR12.5/VR12-compliant microprocessor core and memory voltage regulation with emphasis on efficiency, accuracy, and transient robustness.
FAQ
What is the primary compliance standard supported by the ISL6374IRTZ-T?
The ISL6374IRTZ-T is fully compliant with Intel VR12.5 and VR12 specifications, including SerialVID interface, PSI# signaling, and droop programming requirements. It supports all mandatory registers (IMAX, TMAX, BOOT, ADDRESS OFFSET) and implements the required voltage positioning algorithm for CPU core and memory rails. This compliance ensures interoperability with Intel 3rd–5th generation Core i-series and Xeon processors.
Does the ISL6374IRTZ-T require external firmware or NVM programming?
No, the ISL6374IRTZ-T is NVM- and firmware-free. Its configuration is handled entirely through the SVID bus during runtime - eliminating boot-time delays and simplifying system integration. All VR12.5 parameters, including phase count, droop slope, and PSI behavior, are dynamically programmed by the host CPU, making the ISL6374IRTZ-T inherently compatible with standard BIOS/UEFI implementations.
How does the ISL6374IRTZ-T achieve ±0.5% system accuracy?
The ISL6374IRTZ-T achieves ±0.5% closed-loop system accuracy through differential remote sensing, precision internal references, and calibrated current-sense paths with thermal compensation. The TM pin digitizes NTC temperature to adjust current-sense gain in real time, while the FB/IMON architecture rejects PCB trace resistance and ground bounce - ensuring accuracy holds across –40°C to +125°C and full load range.
Can the ISL6374IRTZ-T operate with only DCR current sensing, or is a discrete resistor required?
The ISL6374IRTZ-T supports both DCR and discrete resistor current sensing - no mandatory external component type. Its integrated current-sense amplifier accepts either configuration, with programmable gain and offset calibration. DCR sensing reduces component count and board space; resistor sensing offers higher SNR in noisy environments. Both methods feed the same FB droop path and IMON reporting channel in the ISL6374IRTZ-T.
What protection features are integrated into the ISL6374IRTZ-T?
The ISL6374IRTZ-T integrates True Catastrophic Failure Protection (CFP), average overcurrent protection, per-phase current limiting, output voltage open-sense detection, and configurable protection disable. CFP monitors gate drive signals and shuts down all phases within 100ns upon detecting shoot-through or short-circuit. The IMON pin also provides precision overcurrent detection independent of FB loop integrity.
ISL6374IRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL6374IRTZ-T FAQ
1.How can I place an order for ISL6374IRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6374IRTZ-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 ISL6374IRTZ-T reliable?
The price and inventory of ISL6374IRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6374IRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL6374IRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6374IRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6374IRTZ-T?
ISL6374IRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6374IRTZ-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 ISL6374IRTZ-T?
For technical support, including ISL6374IRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6374IRTZ-T requirements.
6.How does Aetrix verify that ISL6374IRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6374IRTZ-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 ISL6374IRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL6374IRTZ-T?
All ISL6374IRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6374IRTZ-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 ISL6374IRTZ-T part is unused and in its original packaging.
Return procedure for ISL6374IRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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