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Renesas ISL69128IRAZ-T
- Part No.:
- ISL69128IRAZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL69128IRAZ-T.pdf
- Description:
- IC REG IMVP8 VR13 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
ISL69128IRAZ-T from Renesas Electronics is a digital dual-output, 7-phase configurable PWM controller compliant with Intel VR13 and IMVP8 specifications. It supports flexible phase allocation (e.g., 6+1, 5+2, 3+3, or 7+0), delivers up to 1MHz switching frequency, and features SVID/PMBus 1.3 interface for microprocessor core and memory rail regulation in high-performance servers.
For engineers reviewing the ISL69128IRAZ-T datasheet, ISL69128IRAZ-T pinout, ISL69128IRAZ-T application, or ISL69128IRAZ-T equivalent, key selection considerations include phase configurability (X+Y ≤ 7), synthetic current modulation for transient response, diode emulation for light-load efficiency, differential remote sensing (±0.5% system accuracy), and black box fault logging capability.
Technical Context
The ISL69128IRAZ-T implements a proprietary digital linear synthetic current modulation scheme enabling zero-latency current balancing and dual-edge modulation for fast transient response. It supports SVID communication for VR13/IMVP8 processor control and PMBus 1.3 for configuration, telemetry, and fault reporting at up to 2MHz bus speed.
Its multitiered fault management includes pulse-by-pulse phase current limiting, total output current protection, input/output OV/UV detection, open voltage sense detection, and configurable Catastrophic Failure Protection (CFP) flag output - all coordinated via nonvolatile memory storing up to 8 configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual output (X and Y), X+Y ≤ 7 phases total - enables scalable power delivery for core + memory rails |
| Switching Frequency | Up to 1MHz - supports high-density PCB layouts with smaller magnetics and capacitors |
| Voltage Sensing Accuracy | ±0.5% closed-loop system accuracy over load, line, and temperature - achieved via differential remote sensing |
| Bus Interface | PMBus 1.3 and SVID - enables dynamic voltage identification (DVID), telemetry, and platform-level power management |
| Current Sensing | High-accuracy DCR sensing with integrated temperature compensation - ensures precise load-line regulation and OCP threshold stability |
| Fault Logging | Black box recording capability - captures pre-fault telemetry for root-cause analysis without external debug tools |
Pinout & Package
ISL69128IRAZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin assignment follows Renesas' standard VR controller layout optimized for SVID signaling, phase driver interfacing, and differential voltage sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Power input for internal LDOs and logic - accepts 3V to 12V, decoupled locally for noise immunity |
| VDDIO | I/O supply | 3.3V supply for SVID/PMBus interface and GPIOs - independent of VIN for robust communication |
| SVID_DATA / SVID_CLK | SVID bidirectional interface | Direct connection to Intel CPU SVID bus - supports DVID, alerts, and status reporting per VR13 spec |
| PMBUS_SDA / PMBUS_SCL | PMBus 1.3 interface | Configurable two-wire bus for full telemetry, configuration storage, and fault logging access |
| VSNSP/VSNSN | Differential remote sense inputs | High-impedance inputs for Kelvin sensing at load - enables ±0.5% regulation accuracy across thermal gradients |
| PHASE[0:6] | Phase driver enable outputs | Seven open-drain outputs driving external gate drivers or smart power stages - support phase add/drop sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Digital linear synthetic current modulation | Eliminates need for external current-sense resistors while delivering zero-latency current balance across phases |
| Auto phase add/drop with boot refresh | Maintains optimal efficiency across 0–100% load range by dynamically enabling/disabling phases and resetting control state on transition |
| Diode emulation mode | Disables synchronous rectification at light loads to reduce shoot-through losses - improves efficiency below 10% load |
| Configurable Catastrophic Failure Protection (CFP) | Hardware-latched fault flag that asserts on multi-phase overcurrent or input UV - triggers system-level shutdown before damage occurs |
| NVM-stored configurations | Eight independent configurations retained across power cycles - enables rapid re-deployment across multiple rail types (core/memory/system) |
Applications
| Server Core Rail | Graphics Memory Rail |
|---|---|
Use Scenario: Regulating VCCIN for dual-socket Xeon Scalable processors in 2U/4U rack servers. IC Role / Device Role / Timing Role: Primary VR13-compliant PWM controller managing up to 6 phases on core rail and 1 on memory rail. Use Value: Synthetic current modulation ensures sub-100ns transient response to CPU burst loads, minimizing voltage droop during AVX-512 execution. | Use Scenario: Powering GDDR6 memory subsystems in AI inference accelerators requiring tight voltage tolerance. IC Role / Device Role / Timing Role: Dual-output controller assigning 4 phases to GPU core and 3 to memory rail with independent DVID control. Use Value: Differential remote sensing maintains ±0.5% regulation at memory die under 150A peak current and 85°C junction temperature. |
| Overclocked Desktop Platform | Data Center System Rail |
Use Scenario: Enabling extreme overclocking on enthusiast desktop motherboards with adaptive voltage scaling. IC Role / Device Role / Timing Role: Configured as 7+0 single-output mode driving high-current core rail with dynamic phase shedding. Use Value: Diode braking reduces overshoot during rapid load release (e.g., gaming-to-idle transitions), preventing memory controller reset. | Use Scenario: Supplying auxiliary 1.8V or 3.3V system rails in NVMe storage controllers and OCP NICs. IC Role / Device Role / Timing Role: Secondary output operating in 2+2 or 1+3 mode with PMBus telemetry for firmware-based rail health monitoring. Use Value: Black box fault logging captures timestamped current/voltage/temperature data before catastrophic faults - accelerating field failure analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL69137IRAZ-T | Single-output, 7-phase VR13 controller with identical modulation scheme but no second SVID channel | Lacks dual-rail coordination; suitable only for core-only or memory-only designs | Select when only one regulated rail is required and space/power constraints favor integration over flexibility |
| RTQ2134B-QA | Analog dual-output controller (4+3 phases), no PMBus/SVID, fixed-frequency operation only | No digital telemetry or configuration storage; requires external DAC for DVID | Choose for cost-sensitive industrial applications where firmware-controlled adaptability is unnecessary |
Compared with ISL69128IRAZ-T, the ISL69137IRAZ-T sacrifices dual-rail coordination for reduced BOM count, while the RTQ2134B-QA trades digital configurability for analog simplicity - making ISL69128IRAZ-T the only option supporting simultaneous VR13-compliant core+memory regulation with black box diagnostics.
Availability
ISL69128IRAZ-T is available at Aetrix Electronics and suitable for high-performance servers, AI accelerator modules, and overclocked desktop platforms requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL69128IRAZ-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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with deep expertise in power management and microcontroller technologies.
The ISL69128IRAZ-T belongs to Renesas' VR13/IMVP8 digital multiphase controller product line, engineered specifically for high-efficiency, high-transient-response CPU and memory rail regulation in next-generation computing platforms.
FAQ
What is the maximum phase count supported by the ISL69128IRAZ-T?
The ISL69128IRAZ-T supports up to seven total phases distributed across its two outputs (X and Y) with the constraint X+Y ≤ 7 - e.g., 5+2, 4+3, or 7+0. This configurability allows designers to allocate phases optimally between CPU core and memory rails without hardware changes. The ISL69128IRAZ-T does not support more than seven phases unless paired with a phase doubler like the ISL6617A.
Does the ISL69128IRAZ-T support both SVID and PMBus interfaces simultaneously?
Yes, the ISL69128IRAZ-T integrates independent SVID and PMBus 1.3 interfaces. SVID handles real-time processor commands (DVID, alerts), while PMBus manages configuration, telemetry, and fault logging. Both operate concurrently - for example, SVID adjusts voltage during runtime while PMBus reads temperature data or stores new settings in NVM. This dual-interface capability is intrinsic to the ISL69128IRAZ-T architecture.
How does the ISL69128IRAZ-T achieve ±0.5% system voltage accuracy?
The ISL69128IRAZ-T achieves ±0.5% closed-loop system accuracy using differential remote voltage sensing (VSNSP/VSNSN pins) combined with internal calibration and temperature-compensated DCR current sensing. This eliminates PCB trace resistance errors and maintains regulation tolerance across load, line, and temperature variations - a requirement verified in Intel VR13 compliance testing for the ISL69128IRAZ-T.
Can the ISL69128IRAZ-T operate without an external smart power stage?
No, the ISL69128IRAZ-T is a controller-only device and requires external power stages such as the ISL99227 60A smart power stage or discrete MOSFETs with gate drivers. It provides phase enable signals (PHASE[0:6]) and current-sense interface but lacks integrated power FETs. This controller-only architecture is fundamental to the ISL69128IRAZ-T design, enabling scalability across current requirements.
What fault protection features are implemented in hardware on the ISL69128IRAZ-T?
The ISL69128IRAZ-T includes hardware-based protections: pulse-by-pulse phase current limiting, total output current protection, input/output overvoltage and undervoltage detection, open voltage sense detection, and a configurable Catastrophic Failure Protection (CFP) flag. These operate independently of firmware and respond within nanoseconds - critical for protecting expensive CPUs and memory in systems using the ISL69128IRAZ-T.
ISL69128IRAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel IMVP8, 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:
- 48-QFN (6x6)
ISL69128IRAZ-T FAQ
1.How can I place an order for ISL69128IRAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL69128IRAZ-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 ISL69128IRAZ-T reliable?
The price and inventory of ISL69128IRAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL69128IRAZ-T is usually 5 days.
3.What payment methods are accepted for ISL69128IRAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL69128IRAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL69128IRAZ-T?
ISL69128IRAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL69128IRAZ-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 ISL69128IRAZ-T?
For technical support, including ISL69128IRAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL69128IRAZ-T requirements.
6.How does Aetrix verify that ISL69128IRAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL69128IRAZ-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 ISL69128IRAZ-T meets industry standards.
7.What is the process for return or replacement of ISL69128IRAZ-T?
All ISL69128IRAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL69128IRAZ-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 ISL69128IRAZ-T part is unused and in its original packaging.
Return procedure for ISL69128IRAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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