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Renesas ISL69125IRAZ-T
- Part No.:
- ISL69125IRAZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
ISL69125IRAZ-T.pdf
- Description:
- IC REG CTRLR INTEL 2OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,891
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Product details
Overview
ISL69125IRAZ-T from Renesas Electronics is a digital dual-output, 4-phase configurable VR13-compliant PWM controller for Intel microprocessor core and memory rails. It supports flexible phase allocation (e.g., 3+1 or 2+2), delivers up to 1MHz switching, enables ±0.5% closed-loop system accuracy via differential remote sensing, and integrates PMBus v1.3 and SVID interfaces for telemetry and configuration.
For engineers reviewing the ISL69125IRAZ-T datasheet, ISL69125IRAZ-T pinout, ISL69125IRAZ-T application, or ISL69125IRAZ-T equivalent, key selection considerations include VR13 compliance, synthetic current modulation architecture, auto phase add/drop behavior, diode emulation support, and PowerNavigator™-based configuration with 8 NVM-stored profiles.
Technical Context
The ISL69125IRAZ-T implements Renesas' proprietary digital linear synthetic current modulation, enabling zero-latency current balance across phases and dual-edge modulation for sub-100ns transient response. It natively supports Intel VR13 SVID protocol and PMBus v1.3 at up to 2MHz, with configurable catastrophic fault protection and black-box fault logging.
Phase assignment is fully programmable (X+Y ≤ 4), supporting asymmetric configurations like 4+0, 3+1, or 2+2. Current sensing supports both DCR with integrated temperature compensation and external input current sense-critical for NVDIMM applications-and enables precise load-line regulation and OCP with peak/average detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual output (X/Y), X+Y ≤ 4 total phases - enables asymmetric rail control for CPU core + memory or GPU + SoC rails |
| Switching Frequency | Up to 1MHz - supports high-density, low-inductance power stages in space-constrained server and graphics designs |
| Voltage Sensing Accuracy | ±0.5% over load/line/temp - achieved via differential remote sensing, ensuring tight regulation under dynamic load transients |
| Bus Interface | PMBus v1.3 & SVID - enables real-time telemetry, dynamic voltage identification (DVID), and firmware-updatable configuration |
| Current Sensing | DCR sense with on-die temp compensation + optional external input current sense - supports accurate OCP and NVDIMM input monitoring |
| Fault Management | Pulse-by-pulse phase limiting, total output current protection, OV/UV, open-sense detect, black-box logging - enables robust field-deployed reliability |
Pinout & Package
ISL69125IRAZ-T is housed in a 40-pin QFN package (5mm × 5mm, 0.4mm pitch) with exposed thermal pad. Pin functions are defined per Renesas FN8738 Rev. 1.00, including dedicated SVID/PMBus lines, phase gate drivers, current sense inputs, voltage reference, and fault flag outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power supply input | Supplies internal LDOs and logic; must be decoupled near package for noise immunity |
| VDDA | Analog supply | Powers ADC, current sense circuitry, and reference buffers; requires clean 3.3V source |
| SVID_DATA / SVID_CLK | Intel SVID interface | Direct connection to CPU for dynamic voltage scaling and telemetry reporting |
| PMBUS_SDA / PMBUS_SCL | PMBus v1.3 interface | Enables bidirectional configuration and monitoring via system management controller |
| PHASE0–PHASE3 | Gate drive outputs | Configurable as high-side drivers for up to four synchronous buck phases |
| ISENx+, ISENx− | Differential current sense inputs | Accept DCR voltage drop across power stage inductors; enable per-phase current balancing |
| VSNS+, VSNS− | Differential remote voltage sense | Compensates for IR drop between regulator and load; required for ±0.5% accuracy |
| PGOOD | Power-good status output | Open-drain signal indicating regulated output within tolerance; used for sequencing and fault isolation |
Key Features
| Feature | Design Value |
|---|---|
| Digital linear synthetic current modulation | Eliminates need for external current sense resistors while delivering zero-latency phase current balance and superior transient response |
| Auto phase add/drop | Dynamically enables/disables phases based on load current, maintaining >90% efficiency from 10% to full load in server applications |
| Diode emulation mode | Disables low-side FET during light load to reduce conduction loss, extending high-efficiency operation down to <1A |
| 8 NVM configuration storage | Allows pre-programmed profiles for different operating modes (e.g., performance vs. idle), reducing boot-time configuration overhead |
| Black-box fault recording | Logs timestamped fault conditions (e.g., OCP event, OV latch) into nonvolatile memory for post-failure root-cause analysis |
Applications
| Server CPU Core Rail | DDR4/DDR5 Memory Rail |
|---|---|
Use Scenario: High-current, fast-transient regulation for dual-socket x86 servers with Intel Xeon Scalable processors. IC Role / Device Role / Timing Role: Primary VR13-compliant PWM controller managing up to 4 phases on core rail with SVID handshake and DVID support. Use Value: Delivers ±0.5% voltage accuracy and sub-50µs load-step response using synthetic current control and differential sensing. | Use Scenario: Precision regulation of DDR4/DDR5 VDDQ and VPP rails in enterprise storage and AI accelerators. IC Role / Device Role / Timing Role: Secondary output configured as 2-phase controller with independent loop tuning and DCR-based current sensing. Use Value: Enables tight load-line regulation and accurate OCP for memory modules requiring strict voltage tolerance and thermal-aware current limiting. |
| High-Performance GPU Rail | NVDIMM Power Management |
Use Scenario: Multi-rail power delivery for discrete GPUs in data center inference servers. IC Role / Device Role / Timing Role: Dual-output operation (3+1) - three phases for GPU core, one for memory interface, each with independent SVID/PMBus control. Use Value: Supports simultaneous dynamic voltage scaling across two rails while maintaining phase synchronization and current sharing accuracy. | Use Scenario: Backup power conditioning and input current monitoring for non-volatile DIMMs in persistent memory systems. IC Role / Device Role / Timing Role: Configured with external input current sense input to monitor NVDIMM charge/discharge current during power-loss events. Use Value: Enables precise input current measurement and fault-triggered safe shutdown, meeting JEDEC JESD229 requirements for persistent memory reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL69122IRAZ-T | Single-output, 4-phase VR13 controller; lacks second independent output and SVID slave capability | Only suitable for single-rail applications (e.g., CPU core only); cannot support memory or auxiliary rail control | Select when only one regulated rail is needed and cost optimization is prioritized over flexibility |
| RT8806AZSP | Analog dual-output controller (not digital); no PMBus/SVID, no NVM storage, no black-box logging | Targeted at cost-sensitive client platforms; lacks telemetry, configurability, and fault diagnostics required for server-grade reliability | Choose for embedded or entry-level computing where digital control and telemetry are not required |
Compared with ISL69125IRAZ-T, the ISL69122IRAZ-T reduces feature set to single-rail operation but retains VR13 compliance and synthetic current control, while the RT8806AZSP trades digital configurability and fault intelligence for analog simplicity and lower BOM cost-neither offers pin compatibility or drop-in replacement capability.
Availability
ISL69125IRAZ-T is available at Aetrix Electronics and suitable for high-performance server core rails, DDR5 memory regulation, and GPU power delivery requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for ISL69125IRAZ-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 is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and data infrastructure markets.
The ISL69125IRAZ-T belongs to Renesas' VR13-compliant digital multiphase controller product line, engineered specifically for high-efficiency, high-reliability power delivery to Intel's latest-generation CPUs, GPUs, and memory subsystems in cloud-scale and AI-accelerated platforms.
FAQ
What is the primary function of the ISL69125IRAZ-T in a VR13 power system?
The ISL69125IRAZ-T serves as a digital dual-output, 4-phase configurable PWM controller that manages voltage regulation for Intel VR13-compliant microprocessors. It directly handles core and memory rail control via SVID and PMBus interfaces, implements synthetic current modulation for precise phase current balancing, and supports dynamic phase add/drop to optimize efficiency across load ranges. Its design enables tight voltage accuracy and fast transient response essential for modern server and AI workloads.
Does the ISL69125IRAZ-T support both SVID and PMBus communication simultaneously?
Yes, the ISL69125IRAZ-T supports concurrent SVID and PMBus v1.3 operation: SVID is used for real-time CPU-to-controller communication (e.g., DVID, telemetry), while PMBus provides system-level configuration, monitoring, and fault logging via the baseboard management controller. Both interfaces operate independently with dedicated pins and timing-SVID runs at CPU-defined rates, and PMBus supports up to 2MHz clocking for rapid register access.
How does the ISL69125IRAZ-T achieve ±0.5% closed-loop voltage accuracy?
The ISL69125IRAZ-T achieves ±0.5% closed-loop system accuracy through differential remote voltage sensing (VSNS+/VSNS−), which compensates for PCB IR drop between the controller and load. This is combined with high-precision internal DACs, low-drift reference circuitry, and digital loop compensation tuned via PowerNavigator™ software. The accuracy is maintained across full load, line, and temperature ranges as verified in Renesas FN8738 characterization data.
Can the ISL69125IRAZ-T be used with external smart power stages like the ISL99227?
Yes, the ISL69125IRAZ-T is explicitly designed to interface with Renesas ISL99227 60A smart power stages. Its gate drive outputs (PHASE0–PHASE3) deliver appropriate voltage levels and timing margins for ISL99227's integrated drivers, and its DCR current sense inputs are calibrated for the ISL99227's integrated current-sense resistor. Reference designs in FN8738 confirm interoperability and optimal thermal/current sharing performance.
What fault protection features are implemented in the ISL69125IRAZ-T?
The ISL69125IRAZ-T implements comprehensive fault protection including pulse-by-pulse phase current limiting, total output current protection, input/output overvoltage and undervoltage detection, open voltage sense line detection, and configurable Catastrophic Failure Protection (CFP) flag output. It also features black-box fault logging that captures timestamped event data-including OCP triggers, OV latches, and thermal warnings-for post-failure diagnostics without requiring external memory.
ISL69125IRAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR13
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0V ~ 3.05V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL69125IRAZ-T FAQ
1.How can I place an order for ISL69125IRAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL69125IRAZ-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 ISL69125IRAZ-T reliable?
The price and inventory of ISL69125IRAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL69125IRAZ-T is usually 5 days.
3.What payment methods are accepted for ISL69125IRAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL69125IRAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL69125IRAZ-T?
ISL69125IRAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL69125IRAZ-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 ISL69125IRAZ-T?
For technical support, including ISL69125IRAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL69125IRAZ-T requirements.
6.How does Aetrix verify that ISL69125IRAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL69125IRAZ-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 ISL69125IRAZ-T meets industry standards.
7.What is the process for return or replacement of ISL69125IRAZ-T?
All ISL69125IRAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL69125IRAZ-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 ISL69125IRAZ-T part is unused and in its original packaging.
Return procedure for ISL69125IRAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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