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Renesas ISL6322CRZ
- Part No.:
- ISL6322CRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6322CRZ.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,887
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Product details
Overview
ISL6322CRZ 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 supports 2-, 3-, or 4-phase operation, delivers ±0.5% system accuracy over temperature, features Active Pulse Positioning (APP) modulation, and operates across 0°C to +70°C ambient.
For engineers reviewing the ISL6322CRZ datasheet, ISL6322CRZ pinout, ISL6322CRZ application, or ISL6322CRZ equivalent, key selection considerations include its integrated driver architecture, differential remote sensing, programmable VID tables, I²C-configurable voltage margining and overvoltage protection, and support for DCR-based continuous current sensing with channel balancing.
Technical Context
The ISL6322CRZ implements a multi-phase synchronous buck control architecture with fully differential, continuous DCR current sensing per phase-enabling precise load-line programming and real-time channel current balancing. Its proprietary Active Pulse Positioning (APP) modulation allows dynamic pulse placement within each switching cycle to minimize response latency during high di/dt load transients.
It integrates dual adaptive dead time schemes (PHASE-detect or LGATE-detect), supports selectable slave I²C addresses (1000_110x or 1000_111x), and provides programmable soft-start ramp rates (0.625–6.25 mV/µs), adjustable reference offset via OFS pin, and multi-tiered overvoltage/undervoltage protection with open-sense line prevention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to +70°C - Specifies industrial-grade ambient operating envelope for stable microprocessor VDD delivery. |
| Phase Support | 2-, 3-, or 4-phase - Configurable topology: internal drivers for ≤3 phases; external PWM driver required for full 4-phase operation. |
| System Accuracy | ±0.5% (1.0–1.6V range) - Ensures tight core voltage regulation critical for modern CPU DVFS compliance. |
| Switching Frequency | Up to 1.5 MHz per phase - Enables use of smaller magnetics and output capacitors in space-constrained server/desktop VRMs. |
| I²C Interface | Configurable slave address & register access - Allows dynamic adjustment of margining offset, OVP threshold, and dead time scheme without hardware change. |
| Current Sensing | Fully differential DCR sensing - Eliminates sense resistors, reduces power loss, and enables cycle-by-cycle channel balancing. |
| VID Compatibility | Intel VR10/VR11 + AMD 5-/6-bit DAC tables - Single controller supports heterogeneous CPU platforms via VRSEL pin configuration. |
Pinout & Package
ISL6322CRZ is housed in a 48-lead 7×7 mm QFN package with exposed thermal pad (PKG DWG # L48.7x7), RoHS-compliant Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic; requires 0.1 µF ceramic decoupling. |
| PVCC1_2 / PVCC3 | Gate drive power rails | Independent +5V to +12V supplies for upper/lower MOSFET drivers; unconnected PVCC3 configures 2-phase mode. |
| VID0–VID7 | DAC reference inputs | 8-bit TTL-compatible inputs decoded per Intel/AMD VID table selected by VRSEL voltage level. |
| ISEN1±–ISEN4± | Differential current sense inputs | Four pairs for continuous DCR-based inductor current monitoring per phase; enable channel balancing and OCP. |
| UGATE1–3 / LGATE1–3 | MOSFET gate drivers | Integrated high-side/low-side drivers with <2.0 Ω source/sink resistance; support adaptive shoot-through protection. |
| PWM4 / EN_PH4 | 4th-phase control interface | PWM4 outputs to external driver IC; EN_PH4 enables/disables 4th phase or sets POR sync point for external driver. |
| SCL / SDA / SS/RST/A0 | I²C bus interface | Standard bidirectional I²C interface; A0 selects slave address (1000_110x or 1000_111x); SS/RST resets I²C registers. |
| VSEN / RGND / VDIFF | Remote voltage sensing | Differential amplifier inputs (VSEN/RGND) and output (VDIFF) compensate for PCB IR drop between VRM and CPU die. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers | Reduces BOM count and layout area vs. discrete controller+driver solutions; supports up to 3-phase with internal drivers. |
| Active Pulse Positioning (APP) | Enables sub-cycle transient response by dynamically placing PWM edges-critical for CPU load-step events exceeding 100 A/µs. |
| Differential remote sensing | Compensates for voltage drop across PCB traces and connectors, maintaining ±0.5% regulation at CPU die under varying load currents. |
| Programmable reference offset | OFS pin supports positive/negative DC offset (via external resistor to VCC/GND) for fine-tuning output voltage without changing VID code. |
| Multi-processor VID compatibility | Single hardware design supports Intel VR10/VR11 and AMD CPUs via VRSEL pin voltage selection and dynamic VID decoding. |
Applications
| Server CPU Power Delivery | Desktop Platform VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors with dynamic load steps up to 150 A/µs. IC Role / Device Role / Timing Role: Four-phase PWM controller managing synchronous buck stages with integrated drivers, DCR current sensing, and I²C-configurable OVP. Use Value: APP modulation and Adaptive Phase Alignment reduce output voltage droop to <15 mV during 100-A load steps, minimizing required bulk capacitance. | Use Scenario: Compact 3-phase VRM on ATX motherboard powering Intel Core i9 or AMD Ryzen 9 CPUs. IC Role / Device Role / Timing Role: Three-phase controller with internal drivers, differential remote sensing, and VID decoding for precise VDDIO/VDDCR regulation. Use Value: ±0.5% system accuracy ensures stable operation across -40°C to +70°C ambient, meeting Intel VR11.1 specification requirements. |
| Laptop CPU Voltage Regulator | Workstation GPU Core Supply |
Use Scenario: High-efficiency 2-phase VRM for mobile Core i7 CPUs with thermal constraints and dynamic frequency scaling. IC Role / Device Role / Timing Role: Dual-phase controller using PVCC1_2 only; leverages I²C interface for real-time voltage margining during thermal throttling. Use Value: Selectable I²C slave address enables coexistence with other PMICs on shared bus; OFS pin allows factory calibration offset without firmware update. | Use Scenario: 4-phase GPU core supply on PCIe add-in card supporting NVIDIA RTX or AMD Radeon GPUs. IC Role / Device Role / Timing Role: Controller configured for 4-phase operation using PWM4 output to external ISL6612 driver; supports NTC thermal compensation. Use Value: Fully differential DCR sensing maintains channel balance within ±3% across 0–100% load, preventing thermal runaway in densely packed GPU modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6323IRZ | Extended temperature range (-40°C to +85°C); identical pinout and feature set; same VID tables and I²C interface. | Required for extended-temperature industrial or telecom applications where ISL6322CRZ's 0°C to +70°C rating is insufficient. | Select ISL6323IRZ when ambient operating conditions exceed +70°C or require automotive-grade reliability screening. |
| RT8803AGQW | 3-phase-only controller; no integrated drivers (requires external drivers); supports Intel VR12.5 but not AMD VID tables; different I²C register map. | Suitable for cost-sensitive desktop motherboards targeting Intel-only platforms with lower phase count requirements. | Choose RT8803AGQW only if 3-phase operation suffices and AMD compatibility is unnecessary; verify I²C register reimplementation. |
Compared with ISL6322CRZ, ISL6323IRZ offers identical functionality with extended temperature capability, while RT8803AGQW trades AMD support and integrated drivers for lower BOM cost in Intel-specific 3-phase designs-neither is pin-compatible, requiring layout revision.
Availability
ISL6322CRZ is available at Aetrix Electronics and suitable for server CPU power delivery, desktop platform VRMs, laptop voltage regulators, and workstation GPU core supplies requiring stable component supply and long-term industrial availability.
Supply support for ISL6322CRZ 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 product support for legacy Intersil power management ICs including the ISL63xx family.
The ISL6322CRZ belongs to Renesas' high-performance multiphase buck controller product line, engineered specifically for precision, low-noise core voltage regulation in x86 and x86-64 microprocessor platforms.
FAQ
What is the maximum supported switching frequency per phase for the ISL6322CRZ?
The ISL6322CRZ supports an adjustable switching frequency range from 80 kHz to 1.0 MHz per phase, with typical operation up to 1.5 MHz achievable using external frequency-setting components and optimized layout. The oscillator accuracy is ±10% over temperature and supply variation, ensuring stable timing for high-frequency VRM designs.
Does the ISL6322CRZ support AMD processor voltage identification natively?
Yes, the ISL6322CRZ natively supports AMD voltage identification through configurable 5-bit and 6-bit DAC tables. The VRSEL pin voltage determines mode selection: 3.0V to VCC activates AMD mode, enabling direct compatibility with AMD Athlon, Phenom, and Ryzen processors without external VID translation logic.
How does the ISL6322CRZ achieve channel current balancing across multiple phases?
The ISL6322CRZ achieves channel current balancing using fully differential, continuous DCR current sensing on all four phases. It computes a cycle-average current (IAVG) and adjusts each phase's PWM duty cycle in real time to force individual channel currents within ±3% of IAVG-enabling uniform thermal distribution and reliable high-current operation.
Can the ISL6322CRZ operate in 2-phase mode without external components?
Yes, the ISL6322CRZ can operate in 2-phase mode by leaving the PVCC3 pin unconnected or grounded. This disables the third and fourth phases, configuring the controller for dual-phase operation using only UGATE1/LGATE1 and UGATE2/LGATE2, with full retention of integrated drivers, remote sensing, and I²C functionality.
What protection features are integrated into the ISL6322CRZ?
The ISL6322CRZ integrates multi-tiered overvoltage protection (OVP), undervoltage protection (UVP), overcurrent protection (OCP) per channel and average, thermal shutdown at 160°C, open-sense line detection, and adaptive non-overlap timing to prevent shoot-through. All protections trigger PGOOD deassertion and can be configured via I²C registers for system-level fault handling.
ISL6322CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL6322CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6322CRZ 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 reliable?
The price and inventory of ISL6322CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6322CRZ is usually 5 days.
3.What payment methods are accepted for ISL6322CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6322CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6322CRZ?
ISL6322CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6322CRZ 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?
For technical support, including ISL6322CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6322CRZ requirements.
6.How does Aetrix verify that ISL6322CRZ is sourced from the original manufacturer or authorized distributors?
All ISL6322CRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL6322CRZ?
All ISL6322CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6322CRZ, 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 part is unused and in its original packaging.
Return procedure for ISL6322CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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