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Renesas ISL6375IRTZ
- Part No.:
- ISL6375IRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6375IRTZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,570
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Product details
Overview
ISL6375IRTZ from Renesas (formerly Intersil) is a hybrid digital 5-phase PWM controller for Intel VR12.5/VR12-compliant microprocessor core and memory voltage regulation. It delivers ±0.5% closed-loop system accuracy over load, line, and temperature; supports up to 2MHz per phase switching; and implements EAPP modulation for fast transient response in server and high-end desktop CPU power delivery.
For engineers reviewing the ISL6375IRTZ datasheet, ISL6375IRTZ pinout, ISL6375IRTZ application, or ISL6375IRTZ equivalent, key selection considerations include VR12.5/VR12 compliance, SVID/SMBus/PMBus interface compatibility, auto phase shedding behavior, droop programming accuracy, and PSI1/PSI2 low-power mode sequencing with diode emulation.
Technical Context
The ISL6375IRTZ integrates a hybrid digital architecture combining analog control loops with digital configuration via SVID/SMBus - eliminating NVM and firmware while enabling programmable IMAX, TMAX, BOOT, and ADDRESS OFFSET registers. Its EAPP modulation scheme actively positions pulse edges across phases to minimize output capacitor count and improve transient response.
It supports 1–5-phase operation with phase doubler compatibility, differential remote sensing, precision DCR/resistor current sensing, and true catastrophic failure protection (CFP). Thermal monitoring via TM pin feeds digitized NTC data into integrated current-sense compensation and thermal shutdown logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | Configurable 1–5-phase operation; supports phase doubler for extended current capability. |
| Output Accuracy | ±0.5% closed-loop system accuracy across load, line, and temperature - ensures tight CPU VDD tolerance compliance. |
| Switching Frequency | Up to 2MHz per phase - enables smaller magnetics and faster transient response. |
| Interface | SMBus/PMBus/I²C with SVID conflict-free design - allows coexistence with CPU SVID bus without arbitration issues. |
| Current Sensing | Differential precision resistor or DCR sensing with integrated programmable current sense resistors - enables accurate load-line (droop) programming and channel-current balancing. |
| Protection | True Catastrophic Failure Protection (CFP), average OCP, per-phase current limiting, IMON-pin OCP, and open-sense detection - provides multi-layer fault coverage for CPU VRMs. |
| Low-Power Modes | Programmable 1- or 2-phase PSI1 mode; single-phase PSI2/PSI3 with diode emulation - reduces magnetic and switching losses at light load. |
Pinout & Package
ISL6375IRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are optimized for multiphase VRM layout, including dedicated IMON, FB, TM, EN, and SVID signal terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V or 12V input for internal LDOs and gate drivers; decoupling critical for noise immunity. |
| FB | Feedback input | Differential remote sense node; develops precision droop voltage via external resistor network. |
| IMON | Current monitor output | Analog current telemetry output feeding IOUT register via ADC; used by CPU for dynamic VID adjustment. |
| TM | Thermal monitor input | Connects to NTC thermistor; digitized internally for thermal compensation of current sense and overtemperature shutdown. |
| EN | Enable input | Threshold-sensitive logic input coordinating startup timing with other rails; supports sequencing in multi-rail systems. |
| SCL/SDA | I²C/SMBus interface | Two-wire bidirectional bus supporting SVID, PMBus, and custom register access without CPU bus conflict. |
| PSI# | Power state indicator | Active-low input signaling CPU low-power state; triggers automatic phase shedding and diode emulation. |
Key Features
| Feature | Design Value |
|---|---|
| EAPP Modulation | Patented Enhanced Active Pulse Positioning dynamically adjusts pulse edges across phases to reduce output ripple and capacitor count while maintaining sub-100ns transient response. |
| Auto Phase Shedding | Hardware-based phase reduction during light load (PSI1/PSI2/PSI3) without firmware - improves efficiency by >15% at 10% load vs. fixed-phase operation. |
| Droop Programming | Accurate load-line control via precision resistor or DCR sensing with programmable slope - meets Intel VR12.5 droop specification within ±1% error. |
| Start-up into Pre-charged Load | Soft-start logic prevents inrush current when output capacitors are pre-biased - eliminates output voltage overshoot during hot-plug or rail sequencing. |
| True CFP | Dedicated hardware comparator monitors VOUT, IMON, and thermal signals independently - triggers immediate shutdown on catastrophic faults without software delay. |
Applications
| Server CPU Voltage Regulator | High-End Desktop Core VRM |
|---|---|
Use Scenario: Dual-socket Xeon Scalable platform requiring tight VDD tolerance and dynamic phase scaling under workload bursts. IC Role / Device Role / Timing Role: Primary 5-phase VR12.5-compliant PWM controller managing core rail with SVID handshake and real-time current telemetry. Use Value: ±0.5% regulation accuracy and EAPP modulation enable <50µs load-step response with <20mV deviation using only 12x 220µF ceramic output caps. | Use Scenario: Overclocked Core i9 platform with aggressive dynamic VID transitions and multi-level PSI states. IC Role / Device Role / Timing Role: Hybrid digital controller executing auto phase shedding, diode emulation, and Dynamic VID Compensation (DVC) during frequency scaling. Use Value: Programmable slew rate on fast VID steps and PSI-triggered phase reactivation ensure stable voltage during Turbo Boost transitions without undershoot. |
| DDR4 Memory Power Delivery | Workstation GPU Core Supply |
Use Scenario: DDR4 memory subsystem requiring VR12/VR12.5-compliant VDDQ regulation with differential remote sensing. IC Role / Device Role / Timing Role: Dedicated memory-phase controller supporting 3-phase operation with independent droop tuning and current balancing. Use Value: Differential FB sensing eliminates ground bounce errors; DCR current sensing enables accurate load-line matching across multiple DIMMs. | Use Scenario: High-performance workstation GPU demanding high-efficiency light-load operation and robust overcurrent protection. IC Role / Device Role / Timing Role: 5-phase VRM controller implementing PSI2 diode emulation and True CFP for GPU core rail with pre-charged start-up support. Use Value: Diode emulation reduces light-load quiescent current by 40%; CFP prevents damage during GPU driver crashes or VRM component failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Full digital architecture with embedded NVM/firmware; supports VR12.5 but lacks EAPP modulation and PSI2/PSI3 diode emulation. | Requires firmware updates for new CPU generations; less suitable for legacy BIOS environments without PMBus stack. | Choose IR35201MTRPBF when full digital telemetry logging and field-upgradable control algorithms are required. |
| TPS53679RSLR | Analog-based 6-phase controller with D-CAP+ modulation; no SVID interface - uses proprietary VID pins and GPIO-based phase control. | Not SVID-compatible; requires external VID translator IC for Intel CPU interfacing; no PSI# support. | Choose TPS53679RSLR when cost-sensitive industrial CPU designs avoid SMBus complexity and accept fixed-phase operation. |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6375IRTZ uniquely combines VR12.5 SVID compliance, hardware-based auto phase shedding, EAPP modulation, and PSI-triggered diode emulation - delivering superior transient response and light-load efficiency without firmware dependency or external translation logic.
Availability
ISL6375IRTZ is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VRM development, and workstation GPU power delivery requiring stable component supply and long-term lifecycle support.
Supply support for ISL6375IRTZ 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 acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and datacenter applications.
The ISL6375IRTZ belongs to Renesas' multiphase PWM controller product line, engineered specifically for Intel VR12.5/VR12-compliant CPU and memory voltage regulation with emphasis on transient performance, efficiency scalability, and SVID interoperability.
FAQ
What is the primary compliance standard supported by the ISL6375IRTZ?
The ISL6375IRTZ is fully compliant with Intel VR12.5 and VR12 specifications for microprocessor core and memory voltage regulation. It implements SerialVID protocol with programmable IMAX, TMAX, BOOT, and ADDRESS OFFSET registers, and supports SVID conflict-free operation alongside CPU SVID buses. This compliance ensures seamless integration into Intel-based platforms requiring precise droop control, fast transient response, and PSI-state coordination - all verified in the official ISL6375IRTZ datasheet and reference designs.
Does the ISL6375IRTZ require firmware or NVM to operate?
No, the ISL6375IRTZ operates without firmware or non-volatile memory (NVM), distinguishing it from full-digital controllers. Its hybrid digital architecture uses analog control loops with digital configuration via SMBus/PMBus/I²C, enabling low-cost, easy-to-deploy operation. All programmable features - including droop slope, phase count, PSI behavior, and current sensing calibration - are set at runtime. This eliminates firmware update dependencies and reduces qualification time for the ISL6375IRTZ in production environments.
How does the ISL6375IRTZ achieve fast transient response?
The ISL6375IRTZ achieves sub-100ns transient response using Intersil's patented EAPP (Enhanced Active Pulse Positioning) modulation scheme, which dynamically adjusts PWM pulse edges across phases to minimize output ripple and capacitor requirements. Combined with differential remote sensing, precision DCR/resistor current monitoring, and linear control with evenly distributed pulses, the ISL6375IRTZ sustains tight regulation during rapid load steps - validated in Intel VR12.5 test conditions and documented in the ISL6375IRTZ application notes.
What protection features are integrated into the ISL6375IRTZ?
The ISL6375IRTZ integrates True Catastrophic Failure Protection (CFP), average overcurrent protection, per-phase current limiting, precision IMON-pin overcurrent detection, output voltage open-sense protection, and thermal shutdown with NTC-based compensation. These protections operate in hardware without software intervention, ensuring immediate shutdown during faults like shorted FETs, inductor saturation, or thermal runaway - critical for safeguarding high-value CPUs and GPUs powered by the ISL6375IRTZ.
Can the ISL6375IRTZ support start-up into a pre-charged output capacitor bank?
Yes, the ISL6375IRTZ supports start-up into a pre-charged load via dedicated soft-start logic that monitors output voltage before enabling gate drivers. This prevents inrush current and voltage overshoot when hot-plugging or sequencing with other rails - a requirement for redundant power architectures and modular server designs. The feature is enabled by default and requires no external components, making it a reliable part of the ISL6375IRTZ's robust power-up sequence.
ISL6375IRTZ 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)
ISL6375IRTZ FAQ
1.How can I place an order for ISL6375IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6375IRTZ 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 ISL6375IRTZ reliable?
The price and inventory of ISL6375IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6375IRTZ is usually 5 days.
3.What payment methods are accepted for ISL6375IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6375IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6375IRTZ?
ISL6375IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6375IRTZ 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 ISL6375IRTZ?
For technical support, including ISL6375IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6375IRTZ requirements.
6.How does Aetrix verify that ISL6375IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL6375IRTZ 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 ISL6375IRTZ meets industry standards.
7.What is the process for return or replacement of ISL6375IRTZ?
All ISL6375IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6375IRTZ, 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 ISL6375IRTZ part is unused and in its original packaging.
Return procedure for ISL6375IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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