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Renesas ISL6322CRZ-T
- Part No.:
- ISL6322CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6322CRZ-T.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
ISL6322CRZ-T from Renesas (formerly Intersil) is a four-phase buck PWM controller with integrated MOSFET drivers and I²C interface, designed for precision core voltage regulation in Intel VR10/VR11 and AMD microprocessor power delivery systems. It delivers ±0.5% system accuracy over temperature, supports up to 1.5 MHz per-phase switching, and enables active pulse positioning (APP) modulation for high di/dt transient response in server CPU and GPU VRMs.
For engineers reviewing the ISL6322CRZ-T datasheet, ISL6322CRZ-T pinout, ISL6322CRZ-T application, or ISL6322CRZ-T equivalent, key selection considerations include its 48-lead QFN package, differential remote sensing capability, programmable VID table selection (Intel/AMD), I²C-configurable voltage margining and overvoltage protection, and integrated driver adaptive dead time control via PHASE or LGATE detection.
Technical Context
The ISL6322CRZ-T implements a multi-phase interleaved buck architecture with fully differential, continuous DCR current sensing across four channels for precise load-line programming and channel current balancing. Its proprietary Active Pulse Positioning (APP) modulator allows dynamic PWM edge placement within each switching cycle to minimize output voltage droop during rapid load steps.
Control logic integrates dynamic VID decoding, selectable DAC tables (Intel VR10/VR11, AMD 5-/6-bit), and dual-mode adaptive dead time (PHASE detect or LGATE detect). The I²C interface supports slave address configuration (1000_110x or 1000_111x), real-time adjustment of switching frequency, OVP thresholds, and margining offset - all without requiring external microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | 4-phase operation with external PWM driver signal; 2-/3-phase with internal drivers only |
| System Accuracy | ±0.5% over temperature for 1.0–1.6 V output range - ensures tight CPU core voltage compliance |
| Switching Frequency | Adjustable 80 kHz to 1.5 MHz per phase - enables optimization of efficiency vs. size in VRM designs |
| I²C Interface | Configurable slave address (1000_110x / 1000_111x); supports voltage margining, OVP level, and frequency tuning |
| Current Sensing | Fully differential, continuous DCR sensing on all 4 channels - enables accurate load-line programming and <±2% channel current imbalance |
| Operating Temp | 0°C to +70°C ambient - validated for commercial-grade server and workstation motherboard applications |
| Package | 48-lead 7×7 mm QFN with exposed thermal pad - provides low θJA (27°C/W) for high-power density layouts |
Pinout & Package
ISL6322CRZ-T is housed in a 48-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package (PKG DWG # L48.7x7) with an exposed thermal pad for enhanced power dissipation. Pin functions are validated per FN6328 Rev 2.00 datasheet, Page 2 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5 V ±5% supply for small-signal circuitry; requires 0.1 µF ceramic decoupling |
| PVCC1_2 / PVCC3 | Gate drive power rails | Independent +5–12 V supplies for upper/lower MOSFET drivers; decouple with 1.0 µF ceramic |
| VID0–VID7 | Digital voltage ID inputs | 8-bit TTL-compatible inputs decoded per Intel VR10/VR11 or AMD DAC tables selected by VRSEL |
| VRSEL | DAC mode selector | Logic level sets operating mode: <0.6 V = VR10, 0.6–3.0 V = VR11, >3.0 V = AMD |
| ISEN1±–ISEN4± | Differential current sense inputs | Four independent pairs for continuous DCR-based channel current measurement and balancing |
| UGATE1–3 / LGATE1–3 | Integrated gate drivers | Direct drive outputs for upper/lower MOSFETs in phases 1–3; UGATE rise/fall <30 ns @ 12 V |
| PWM4 / EN_PH4 | 4th-phase control interface | PWM4 drives external driver for 4th phase; EN_PH4 enables POR sync or disables 4th phase |
| SCL / SDA / SS/RST/A0 | I²C bus interface | Standard bidirectional I²C communication; A0 selects slave address; SS/RST resets I²C registers |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement to reduce voltage droop during >10 A/µs load transients |
| Adaptive Phase Alignment (APA) | Simultaneously activates all phases during large-step load events to maximize initial current slew rate |
| Differential Remote Sensing | VSEN/RGND inputs with unity-gain amplifier eliminate IR drop errors between VRM and CPU die | Programmable Reference Offset | OFS pin supports ±10 mV to ±50 mV DC offset via external resistor - enables fine-tuned voltage margining |
| Multi-Tier Overvoltage Protection | Two configurable OVP thresholds (default +250 mV / alternate +175 mV above VID) with 100 mV hysteresis |
| Variable Gate Drive Bias | PVCC pins support 5–12 V drive voltage - optimizes Rds(on) vs. switching loss trade-off for discrete MOSFETs |
Applications
| Server CPU VRM | Workstation GPU Power |
|---|---|
Use Scenario: High-current, low-voltage core regulation for dual-socket Xeon Scalable processors in 1U/2U rack servers. IC Role / Device Role / Timing Role: Four-phase PWM controller managing up to 200 A total load with APP-modulated transient response and DCR-based current balancing. Use Value: Enables <10 mV output deviation under 50 A/µs load steps while reducing output capacitance by 40% vs. single-phase solutions. | Use Scenario: Precision voltage regulation for NVIDIA A100 or AMD MI250X GPU compute modules in AI training servers. IC Role / Device Role / Timing Role: Core voltage controller with I²C-configurable margining and OVP - critical for GPU binning and validation testing. Use Value: Allows automated voltage stress testing via I²C commands without hardware rework or firmware update. |
| AMD EPYC™ Platform | Intel Core™ i9 Desktop VRM |
Use Scenario: Multi-phase power delivery for AMD EPYC 7003/9004 series CPUs in enterprise storage and virtualization platforms. IC Role / Device Role / Timing Role: VR11-compliant controller supporting dynamic VID changes and thermal compensation via NTC on VDIFF path. Use Value: Maintains ±0.5% output accuracy across -20°C to +70°C ambient while enabling per-CPU voltage optimization. | Use Scenario: High-efficiency VRM for overclocked Intel Core i9-13900K/KS in enthusiast desktop motherboards. IC Role / Device Role / Timing Role: Four-phase controller with selectable dead time (PHASE/LGATE detect) to match discrete driver timing characteristics. Use Value: Reduces shoot-through risk in high-frequency (>1 MHz) operation with discrete ISL6612/6614 drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | 6-phase capable; integrated telemetry ADC; no integrated drivers - requires external gate drivers | Targeted at higher-current server VRMs (>250 A); lacks native VR10/VR11 DAC tables | Select when scaling beyond 4-phase or requiring digital power monitoring via PMBus |
| TPS53689RTAR | 4-phase with integrated drivers; supports VR12.5/IMVP8; uses SMBus not I²C; different pinout and VID mapping | Optimized for Intel client/mobile CPUs; lower max switching frequency (1 MHz vs. 1.5 MHz) | Select for newer Intel platforms requiring IMVP8 compliance and SMBus-based system management |
Compared with IR35201MTRPBF and TPS53689RTAR, the ISL6322CRZ-T uniquely combines Intel/AMD multi-processor compatibility, integrated drivers in a compact 48-QFN, and I²C configurability - making it optimal for cost-sensitive, space-constrained VRMs where legacy VR10/VR11/AMD support is required without PMBus complexity.
Availability
ISL6322CRZ-T is available at Aetrix Electronics and suitable for server motherboard design, GPU power module development, and AMD/Intel CPU VRM production requiring stable component supply across extended product lifecycles.
Supply support for ISL6322CRZ-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 Corporation acquired Intersil in 2017 and maintains full technical and supply chain support for legacy Intersil power management ICs including the ISL6322 family.
The ISL6322 belongs to Intersil's VRM controller product line, engineered specifically for high-efficiency, multi-phase core voltage regulation in x86 microprocessor platforms with emphasis on transient performance, thermal distribution, and system-level configurability.
FAQ
What is the maximum supported switching frequency for ISL6322CRZ-T?
The ISL6322CRZ-T supports an adjustable switching frequency range from 80 kHz to 1.5 MHz per phase, set by an external resistor on the FS pin. At 100 kΩ, the typical frequency is 250 kHz; the upper limit of 1.5 MHz enables compact magnetics and reduced output capacitance in high-density VRM designs while maintaining stability with proper loop compensation.
Does ISL6322CRZ-T support both Intel and AMD microprocessors?
Yes, the ISL6322CRZ-T natively supports Intel VR10 and VR11 modes as well as AMD processor modes through programmable VID decoding. The VRSEL pin selects the active DAC table: <0.6 V for VR10, 0.6–3.0 V for VR11, and >3.0 V for AMD (5-bit or 6-bit). This multi-processor compatibility eliminates the need for platform-specific controllers in mixed-architecture server platforms.
How does the ISL6322CRZ-T implement current balancing across four phases?
The ISL6322CRZ-T uses fully differential, continuous DCR current sensing on all four channels (via ISEN1±–ISEN4±) to measure inductor current in real time. It computes a cycle-average current (IAVG) and dynamically adjusts each phase's PWM duty cycle to force individual channel currents within ±2% of IAVG - ensuring uniform thermal loading and maximizing power stage efficiency without external op-amps or discrete current sensors.
Can ISL6322CRZ-T operate in 4-phase mode using only its internal drivers?
No, the ISL6322CRZ-T supports 2-phase or 3-phase operation with internal drivers only. For true 4-phase operation, the PWM4 output must drive an external gate driver (e.g., ISL6612), while EN_PH4 controls synchronization and enable/disable behavior. This architecture allows flexibility in driver selection and thermal layout while retaining full control of the fourth phase via the same controller.
What protection features are integrated into ISL6322CRZ-T?
The ISL6322CRZ-T integrates multi-tiered overvoltage protection (OVP) with configurable thresholds (+250 mV or +175 mV above VID), undervoltage lockout (UVLO) at 60% VID, overcurrent protection per channel and average current, thermal shutdown at 160°C, open-sense-line detection, and shoot-through prevention in its gate drivers. These protections safeguard both the microprocessor and power stage under fault conditions without requiring external supervision circuits.
ISL6322CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR10, VR11, AMD CPU
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.38V ~ 1.99V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6322CRZ-T FAQ
1.How can I place an order for ISL6322CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6322CRZ-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 ISL6322CRZ-T reliable?
The price and inventory of ISL6322CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6322CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6322CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6322CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6322CRZ-T?
ISL6322CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6322CRZ-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 ISL6322CRZ-T?
For technical support, including ISL6322CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6322CRZ-T requirements.
6.How does Aetrix verify that ISL6322CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6322CRZ-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 ISL6322CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6322CRZ-T?
All ISL6322CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6322CRZ-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 ISL6322CRZ-T part is unused and in its original packaging.
Return procedure for ISL6322CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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