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Renesas ISL6328ACRZ-T
- Part No.:
- ISL6328ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6328ACRZ-T.pdf
- Description:
- IC REG CTRLR AMD SVI 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,067
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Product details
Overview
ISL6328ACRZ-T from Renesas Electronics is a dual-output, multiphase PWM controller designed for AMD SVI split-plane processors-delivering ±0.6% system voltage accuracy over temperature, 0.15–1.5 MHz selectable switching frequency, and integrated gate drivers for up to four-phase core (VDD) and single-phase northbridge (VDDNB) regulation in server/desktop CPU power delivery.
For engineers reviewing the ISL6328ACRZ-T datasheet, ISL6328ACRZ-T pinout, ISL6328ACRZ-T application, or ISL6328ACRZ-T equivalent, this device supports precision differential remote sensing, temperature-compensated DCR current sensing, adaptive phase alignment (APA), dual-edge modulation, and PSI_L-driven phase shedding-key selection criteria for high-efficiency, transient-responsive AMD platform VRMs.
Technical Context
The ISL6328ACRZ-T implements a hybrid architecture: a 1–4-phase multiphase controller with integrated high- and low-side MOSFET drivers for the processor core, plus a dedicated single-phase controller with integrated drivers for the northbridge. It uses fully differential, continuous DCR sensing across all channels for load-line programming and channel-current balancing.
Its serial VID (SVI) interface operates up to 3.4 MHz and supports dynamic VID, pre-PWROK metal VID, and Power Savings Mode (PSI_L) with diode emulation and gate voltage optimization (GVOT). The controller features advanced protection including two-tier overcurrent (IDD_SPIKE + delayed OCP), multitier overvoltage, and adaptive shoot-through prevention with <10 ns nonoverlap timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Output Configuration | 1–4-phase synchronous buck with integrated drivers; supports external PWM drivers for 3/4-phase operation |
| Northbridge Output | Single-phase synchronous buck with integrated drivers |
| Voltage Regulation Accuracy | ±0.6% system accuracy over 0°C to +70°C for VDD > 1.000 V |
| Switching Frequency Range | 0.15 MHz to 1.5 MHz, resistor-programmable via FS pin |
| Current Sensing Method | Fully differential, continuous DCR sensing with temperature compensation (TCOMP1/TCOMP2 pins) |
| Protection Features | Two-level OCP (instant + delayed), multitier OVP, UVLO, open-sense-line detection, and adaptive shoot-through control |
| Interface Protocol | AMD Serial VID (SVI) compliant, up to 3.4 MHz clock rate, with PSI_L support |
Pinout & Package
ISL6328ACRZ-T is housed in a 48-lead, 6 mm × 6 mm QFN package (RoHS-compliant, L48.6x6B drawing) with exposed thermal pad for enhanced thermal dissipation (θJC = 1°C/W). Pin functions are validated per FN7986 Rev 1.00 datasheet pages 6–8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE1, UGATE2 | Upper MOSFET gate drive outputs | Drive gates of high-side FETs in core phases 1 and 2; monitored for shoot-through prevention |
| LGATE1, LGATE2 | Lower MOSFET gate drive outputs | Drive gates of low-side FETs in core phases 1 and 2; enable adaptive deadtime control |
| PHASE1, PHASE2 | High-side source return nodes | Return path for upper gate drives; used for overcurrent monitoring via voltage drop |
| ISEN1+ to ISEN4−, ISEN_NB+ | Differential current sense inputs | Enable per-channel DCR-based current measurement for load line, balancing, and OCP |
| SVC, SVD | Serial VID clock and bidirectional data | Interface directly with AMD processor SVI bus for dynamic voltage scaling and mode control |
| PSI_L (via DRPCTRL) | Power savings mode control | Resistor-programmable droop configuration and active phase count (1 or 2 phases) during light-load PSI mode |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Phase Alignment (APA) | Resistor-programmable threshold enables automatic phase skew correction to minimize output ripple and improve transient response |
| Dual-Edge Modulation | Enables faster initial response to high di/dt load transients by modulating both rising and falling edges of PWM signals |
| Temperature-Compensated Droop | Uses TCOMP1/TCOMP2 pins to adjust load-line slope vs. temperature-reducing bulk capacitor count without sacrificing regulation stability |
| Integrated Gate Drivers | Monolithic high- and low-side drivers (RDS(on) < 2.5 Ω source/sink) eliminate need for external driver ICs in 1–2-phase core and NB sections |
| Simultaneous Digital Soft-Start | Coordinated ramp-up of both VDD and VDDNB outputs prevents sequencing conflicts and ensures safe CPU initialization |
Applications
| Server CPU Power Delivery | Desktop AMD Platform VRM |
|---|---|
Use Scenario: High-performance x86 server motherboard supplying AMD EPYC™ processors with split-plane VDD/VDDNB rails. IC Role / Device Role / Timing Role: Dual-output VRM controller managing 4-phase core and 1-phase northbridge regulation with SVI protocol compliance and PSI_L phase shedding. Use Value: Enables ±0.6% voltage accuracy and fast transient response (<100 ns nonoverlap timing) under dynamic CPU workloads while reducing component count via integrated drivers. |
Use Scenario: ATX desktop motherboard powering AMD Ryzen™ CPUs requiring precise core/northbridge voltage tracking and low-noise power sequencing. IC Role / Device Role / Timing Role: Primary PWM controller implementing differential remote sensing (VDD_SENSE/VSS_SENSE), load-line droop, and simultaneous soft-start for dual-rail stability. Use Value: Delivers tight regulation and reduced output capacitance through temperature-compensated DCR sensing and APA-critical for compact, thermally constrained consumer platforms. |
| Workstation GPU Compute Node | Embedded AMD-Based Edge AI System |
Use Scenario: Dual-CPU workstation board supporting AMD Threadripper™ PRO with multi-rail power integrity requirements. IC Role / Device Role / Timing Role: Core voltage controller coordinating up to four interleaved phases with channel-current balancing and dual-tier OCP for sustained compute loads. Use Value: Supports high-current (>100 A) core rail with <75 µA droop current tolerance and 1.5 MHz max switching-enabling smaller magnetics and lower EMI in dense PCB layouts. |
Use Scenario: Fanless edge inference appliance using AMD Ryzen™ Embedded V1000 series with strict thermal and reliability constraints. IC Role / Device Role / Timing Role: Integrated power management IC providing robust fault coverage (OVP/UVP/OCP), thermal-aware droop, and programmable PSI_L for dynamic efficiency scaling. Use Value: Ensures long-term reliability via 150°C max junction rating, RoHS-compliant QFN package, and traceable sourcing-meeting industrial lifecycle expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output multiphase VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6328CRZ-T | Non-A version; lacks APA, dual-edge modulation, and GVOT optimization-lower transient performance and no gate voltage optimization in PSI mode | Suitable only for legacy AMD platforms without dynamic phase alignment or advanced light-load efficiency requirements | Select ISL6328ACRZ-T when APA, GVOT, or dual-edge modulation are required for modern AMD SVI implementations. |
| RT8803AGQW | Realtek dual-controller with 3-phase core + 1-phase NB, but no integrated drivers-requires external gate drivers and lacks SVI protocol compliance | Applicable to generic x86 designs using parallel VID or PMBus, not AMD-specific SVI systems | Choose ISL6328ACRZ-T for native AMD SVI support, integrated drivers, and guaranteed compatibility with AMD processor power states. |
Compared with ISL6328CRZ-T and RT8803AGQW, the ISL6328ACRZ-T uniquely combines AMD SVI compliance, monolithic 4-phase core drivers, APA, and GVOT-making it the only drop-in solution for high-fidelity, production-ready AMD CPU VRMs requiring minimal BOM count and guaranteed specification alignment.
Availability
ISL6328ACRZ-T is available at Aetrix Electronics and suitable for server motherboard design, AMD desktop platform development, and embedded edge computing applications requiring stable component supply, full RoHS compliance, and long-term industrial availability.
Supply support for ISL6328ACRZ-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 management, and timing solutions-with strong heritage in high-performance power delivery ICs for computing platforms.
The ISL6328A product line was engineered specifically for AMD's SVI-based split-plane processor architectures, delivering tightly integrated, high-accuracy, multi-phase VRM control with minimal external components and robust protection for mission-critical CPU power rails.
FAQ
What is the maximum supported switching frequency for the ISL6328ACRZ-T?
The ISL6328ACRZ-T supports a selectable switching frequency range from 0.15 MHz to 1.5 MHz, set by an external resistor on the FS pin. At RT = 100 kΩ to VCC, typical frequency is 255 kHz; higher values scale linearly per Equation 1 in FN7986. This range balances efficiency, transient response, and component size for AMD CPU VRMs.
Does the ISL6328ACRZ-T support AMD SVI2 or only SVI1?
The ISL6328ACRZ-T supports AMD Serial VID (SVI) protocol as defined in its original specification-compatible with SVI1 and early SVI2 implementations used in AMD K10 through Piledriver-era processors. It does not support later SVI2 extensions like dynamic frequency scaling commands beyond voltage control, per FN7986 Rev 1.00 functional description.
How does the ISL6328ACRZ-T implement phase shedding in PSI_L mode?
In PSI_L mode, the ISL6328ACRZ-T reduces active core phases from four to one or two based on DRPCTRL pin resistor value. When DRPCTRL is grounded, only one phase remains active; when tied to VCC, two phases operate-both with diode emulation and GVOT optimization to maintain efficiency at light loads without compromising regulation.
Can the ISL6328ACRZ-T be used for Intel processor power delivery?
No-the ISL6328ACRZ-T is specifically architected for AMD SVI-based processors and lacks Intel VRD/IMVP-compatible interfaces such as SVID, PMBus, or VRON signaling. Its SVI protocol stack, PSI_L behavior, and VDD/VDDNB rail separation are optimized exclusively for AMD split-plane architectures.
What thermal performance can be expected from the ISL6328ACRZ-T in a 4-phase design?
In a 4-phase core configuration with PVCC = 12 V and ambient ≤70°C, the ISL6328ACRZ-T achieves θJA = 27°C/W and θJC = 1°C/W. With proper PCB copper pour under the exposed thermal pad and ≥2 oz copper layers, junction temperature remains below 110°C at full load-well within the 150°C absolute maximum rating specified in FN7986.
ISL6328ACRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, AMD SVI
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.0125V ~ 1.55V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (6x6)
ISL6328ACRZ-T FAQ
1.How can I place an order for ISL6328ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6328ACRZ-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 ISL6328ACRZ-T reliable?
The price and inventory of ISL6328ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6328ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6328ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6328ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6328ACRZ-T?
ISL6328ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6328ACRZ-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 ISL6328ACRZ-T?
For technical support, including ISL6328ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6328ACRZ-T requirements.
6.How does Aetrix verify that ISL6328ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6328ACRZ-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 ISL6328ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6328ACRZ-T?
All ISL6328ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6328ACRZ-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 ISL6328ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6328ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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