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Renesas ISL6324AIRZR5381
- Part No.:
- ISL6324AIRZR5381
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6324AIRZR5381.pdf
- Description:
- IC REG CTRLR AMD SVI 2OUT 48QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6324AIRZR5381 from Renesas (formerly Intersil) is a monolithic dual PWM hybrid controller for AMD SVI/PVI split-plane and uniplane processors, delivering ±0.5% system voltage regulation accuracy over temperature, supporting 2–4-phase core VR and single-phase North Bridge VR, with integrated MOSFET drivers and I²C programmability for voltage offset, OVP/PGOOD thresholds, and PSI_L phase shedding - deployed in server CPU power delivery.
For engineers reviewing the ISL6324AIRZR5381 datasheet, ISL6324AIRZR5381 pinout, ISL6324AIRZR5381 application, or ISL6324AIRZR5381 equivalent, key selection considerations include SVI/PVI mode configurability, differential DCR current sensing for load-line droop, adaptive phase alignment (APA), dual-edge modulation for high di/dt transient response, and 48-pin 7×7 QFN package thermal performance.
Technical Context
The ISL6324AIRZR5381 implements two independent control loops: a multi-phase (2–4-phase) VR controller for VDD core using fully differential continuous DCR sensing, APA, and active pulse positioning modulation; and a single-phase VR controller for VDDNB with identical precision regulation architecture. Both sections share I²C programmability, droop control, and dual-tier OVP/UVLO protection.
SVI mode enables serial VID communication via SCL/SDA with AMD processors, while PVI mode uses parallel 6-bit VID inputs (VID0–VID5); mode selection is latched on EN rising edge via VID1/SEL. Phase shedding during PSI_L is programmable in count and PWM-cycle timing via I²C, and gate drive bias (5–12V) is configurable per section via PVCC1_2 and PVCC_NB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Accuracy | ±0.5% over temperature - ensures stable core/NB voltage under thermal stress in server environments. |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and reduced output capacitance in high-density VRMs. |
| Core Phases Supported | 2–4 phases with internal drivers or 3–4 phases with external drivers - flexible scalability for 36A+ CPU loads. |
| Droop Control | Programmable load-line via RSET and DCR sensing - reduces bulk output capacitors by 30–50% in transient-heavy workloads. |
| I²C Interface | Independent voltage margining, OVP/PGOOD trip level setting, and PSI_L phase count/timing control - enables dynamic runtime tuning without hardware change. |
| Current Sensing | Fully differential, continuous DCR sensing on all core channels and NB - achieves precise channel current balance and accurate load-line programming. |
| Gate Drive Capability | UGATE/LGATE rise/fall times ≤26 ns (12V, 3nF) with <2Ω source/sink resistance - supports fast-switching GaN/SiC FETs in high-efficiency designs. |
Pinout & Package
ISL6324AIRZR5381 is housed in a thermally enhanced 48-lead 7mm × 7mm QFN package (L48.7x7) with exposed thermal pad, rated for -40°C to +85°C operation and RoHS-compliant matte tin (e3) termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID1/SEL | Mode Selection Input | Latched at EN rising edge to configure SVI (low) or PVI (high) interface - determines function of VID0/VFIXEN, VID2/SVD, VID3/SVC pins. |
| VSEN / RGND | Differential Remote Sense Inputs | Connect to processor VDDFB[H,L] pins - enables precision core voltage regulation independent of PCB IR drop. |
| ISEN1+ to ISEN4+, ISEN_NB+ | Positive Current Sense Inputs | Tied to VCORE/VNB side of RC sense networks - used for DCR-based load-line droop and per-channel current balancing. |
| ISEN1− to ISEN4−, ISEN_NB− | Negative Current Sense Inputs | Connected to inductor-side node of RC sense networks - forms differential pair for accurate current measurement. |
| UGATE1/2/NB, LGATE1/2/NB | Integrated Gate Drivers | Direct-drive capability for upper/lower MOSFETs - eliminates need for external drivers in 2-phase core + NB configurations. |
| SCL / SDA | I²C Serial Interface | Two-wire bus for runtime configuration of voltage offsets, OVP/PGOOD thresholds, and PSI_L behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Phase Alignment (APA) | Dynamic adjustment of phase timing to minimize ripple and improve transient response - reduces output capacitor count by up to 25%. |
| Dual-Edge Modulation | Enables immediate PWM edge placement within switching cycle - cuts initial load-step response time by >40% vs. conventional PWM. |
| Programmable Droop | Configurable load-line slope via RSET and DCR sensing - allows tight voltage regulation while reducing bulk capacitance requirements. |
| PSI_L Phase Shedding | Reduces active phases under light load via I²C-programmable count and entry/exit timing - improves efficiency at <20% load. |
| Simultaneous Digital Soft-Start | Coordinated ramp-up of both core and NB outputs - prevents sequencing violations and inrush current spikes during power-on. |
Applications
| Server CPU Power Delivery | Workstation Processor VRM |
|---|---|
Use Scenario: High-current, low-voltage power delivery to AMD Opteron or Phenom II processors in 1U/2U rack servers with strict thermal and space constraints. IC Role / Device Role / Timing Role: Dual-output hybrid controller managing 2–4-phase VDD core and single-phase VDDNB with synchronized soft-start and droop compensation. Use Value: Enables 90%+ efficiency at 36A load while maintaining ±5mV regulation window across temperature and line variation. |
Use Scenario: Precision voltage regulation for multi-core AMD FX-series CPUs in professional CAD/rendering workstations requiring stable clock domains. IC Role / Device Role / Timing Role: SVI-mode controller interfacing with AMD processor's serial VID bus to dynamically adjust core/NB voltages during turbo boost events. Use Value: Achieves sub-10µs transient recovery from 20A load steps via APA and dual-edge modulation, preventing timing violations. |
| Embedded Computing Platform | Industrial Control CPU Module |
Use Scenario: Compact, fanless embedded systems using AMD G-Series APUs where board area and thermal headroom are severely limited. IC Role / Device Role / Timing Role: PVI-mode controller decoding parallel VID inputs for fixed-voltage operation with minimal external components and no I²C host required. Use Value: Reduces BOM count by integrating dual VR controllers, drivers, and sensing circuitry into one 7×7 mm QFN - saves >120 mm² PCB area. |
Use Scenario: Ruggedized industrial CPU modules operating in -40°C to +85°C ambient with long-term supply continuity requirements. IC Role / Device Role / Timing Role: Temperature-stable dual VR controller with ±0.5% regulation accuracy and Pb-free RoHS-compliant packaging for extended lifecycle support. Use Value: Eliminates need for external DACs, current-sense amplifiers, or discrete gate drivers - simplifies qualification and reduces field failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output hybrid VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports Intel VR12.5/VR13 protocols only; lacks AMD SVI/PVI native support; uses SMBus instead of I²C; no APA or droop control. | Designed for Intel Core i7/i9 platforms - not compatible with AMD VID signaling or phase-shedding logic. | Select only for Intel-based designs requiring VR12.5 compliance and higher integration density. |
| TPS53679RSLR | Single-chip 6-phase controller with integrated drivers; supports PMBus v1.3; no dedicated NB regulator; no SVI interface. | Targeted at high-phase-count client/server CPUs without North Bridge - requires separate NB solution. | Choose when scaling beyond 4-phase core VR is needed and AMD-specific features are not required. |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6324AIRZR5381 uniquely delivers native AMD SVI/PVI protocol support, integrated dual-regulator architecture with dedicated NB channel, and proprietary APA/dual-edge modulation - making it irreplaceable for legacy and cost-optimized AMD platform designs.
Availability
ISL6324AIRZR5381 is available at Aetrix Electronics and suitable for server CPU power delivery, workstation VRMs, embedded computing platforms, and industrial control CPU modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6324AIRZR5381 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 full support for its high-performance analog and power management portfolio, including legacy VR controllers.
The ISL6324AIRZR5381 belongs to Intersil's Hybrid SVI/PVI Controller product line, designed specifically for cost-sensitive, thermally constrained AMD processor power delivery in servers, workstations, and embedded systems.
FAQ
What is the operating temperature range for the ISL6324AIRZR5381?
The ISL6324AIRZR5381 is rated for industrial temperature operation from -40°C to +85°C, validated per its Absolute Maximum Ratings and Recommended Operating Conditions. This range ensures reliable performance in server chassis, embedded enclosures, and industrial control cabinets where ambient temperatures exceed commercial limits. The device's thermal pad and QFN package enable efficient heat dissipation under sustained 36A core loads.
Does the ISL6324AIRZR5381 support both SVI and PVI interfaces simultaneously?
No - the ISL6324AIRZR5381 operates exclusively in either SVI or PVI mode, selected at power-on via the VID1/SEL pin state before EN assertion. In SVI mode, pins VID0/VFIXEN, VID2/SVD, and VID3/SVC serve as serial VID signals; in PVI mode, they become parallel VID inputs (VID0–VID3). The ISL6324AIRZR5381 does not multiplex or auto-detect interface type during runtime.
How is droop control implemented in the ISL6324AIRZR5381?
Droop control in the ISL6324AIRZR5381 is implemented via programmable load-line using fully differential DCR current sensing on each core phase and the NB channel. The RSET resistor sets the effective current-sense gain, and the controller injects a proportional voltage offset into the error amplifier loop - enabling precise, temperature-stable droop slope without external op-amps or resistive networks.
Can the ISL6324AIRZR5381 drive external MOSFET drivers?
Yes - the ISL6324AIRZR5381 provides PWM3 and PWM4 outputs to interface with external drivers (e.g., ISL6614) for 3- or 4-phase core operation. When using external drivers, the internal UGATE/LGATE pins for those phases are disabled, and corresponding ISEN− pins must be tied to +5V to deactivate internal sensing. The ISL6324AIRZR5381 retains full control of phase alignment, droop, and protection functions regardless of driver topology.
What is the purpose of the APA pin on the ISL6324AIRZR5381?
The APA (Adaptive Phase Alignment) pin on the ISL6324AIRZR5381 sets the trip threshold and time constant for dynamic phase timing adjustment. A 100µA current flows into this pin; connecting a resistor from APA to COMP configures the voltage threshold that triggers phase realignment during load transients. This feature minimizes output ripple and accelerates transient recovery by synchronizing phase edges to current demand changes.
ISL6324AIRZR5381 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, AMD SVI
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 2
- Voltage - Output:
- Up to 2V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6324AIRZR5381 FAQ
1.How can I place an order for ISL6324AIRZR5381 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6324AIRZR5381 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 ISL6324AIRZR5381 reliable?
The price and inventory of ISL6324AIRZR5381 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6324AIRZR5381 is usually 5 days.
3.What payment methods are accepted for ISL6324AIRZR5381?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6324AIRZR5381 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6324AIRZR5381?
ISL6324AIRZR5381 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6324AIRZR5381 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 ISL6324AIRZR5381?
For technical support, including ISL6324AIRZR5381 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6324AIRZR5381 requirements.
6.How does Aetrix verify that ISL6324AIRZR5381 is sourced from the original manufacturer or authorized distributors?
All ISL6324AIRZR5381 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 ISL6324AIRZR5381 meets industry standards.
7.What is the process for return or replacement of ISL6324AIRZR5381?
All ISL6324AIRZR5381 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6324AIRZR5381, 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 ISL6324AIRZR5381 part is unused and in its original packaging.
Return procedure for ISL6324AIRZR5381:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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