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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas ISL6322IRZ

Name: ISL6322IRZ
Brand: Renesas
SKU: ISL6322IRZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ISL6322IRZ

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 48-VFQFN Exposed Pad

Datasheet:: ISL6322IRZ.pdf

Description:: IC REG CTRLR VR10 1OUT 48QFN

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Product details

Overview

ISL6322IRZ 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 -40°C to +85°C operation, delivers ±0.5% system accuracy over temperature, and enables 4-phase operation with external PWM driver signals or 2-/3-phase operation using internal drivers.

For engineers reviewing the ISL6322IRZ datasheet, ISL6322IRZ pinout, ISL6322IRZ application, or ISL6322IRZ equivalent, key selection considerations include its differential remote sensing capability, Active Pulse Positioning (APP) modulation for high di/dt transient response, fully differential DCR current sensing for channel balancing, selectable adaptive dead time (PHASE/LGATE detect), and I²C programmability of voltage margining, switching frequency, and overvoltage thresholds.

Technical Context

The ISL6322IRZ implements a multi-phase synchronous buck architecture with integrated high- and low-side gate drivers per phase (Phases 1–3), plus a dedicated PWM4 output for fourth-phase control. Its control loop uses a unity-gain differential amplifier for remote voltage sensing and supports dynamic VID decoding across Intel VR10, VR11, and AMD 5-/6-bit DAC tables.

It features continuous, fully differential DCR-based current sensing on all four channels for load-line programming and real-time channel current balancing, coupled with proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) to minimize output voltage droop during rapid load transients up to 1.5 MHz per phase.

Key Specifications

Parameter	Value and Actual Design Meaning
Ambient Temp Range	-40°C to +85°C - Specifies industrial-grade operating envelope for reliable deployment in server, telecom, and embedded computing environments.
System Accuracy	±0.5% (1.000V–1.600V range) - Enables tight core voltage regulation critical for modern CPU/GPU VDD compliance.
Switching Frequency	Up to 1.0 MHz per phase (adjustable via FS pin resistor) - Supports high-frequency operation to reduce passive component size and improve transient response.
Current Sensing	Fully differential DCR sensing on all 4 channels - Provides accurate, drift-free channel current measurement for precise load-line programming and thermal balancing.
I²C Interface	Configurable slave address (1000_110x / 1000_111x), supports voltage margining, OV threshold adjustment, and dead time scheme selection - Enables dynamic system-level power management without hardware changes.
Driver Output Capability	UGATE rise/fall: 26 ns / 18 ns; LGATE rise/fall: 18 ns / 12 ns (12V PVCC, 3nF load) - Ensures fast, low-loss switching of high-performance discrete or integrated power stages.
Protection Features	Multi-tiered overvoltage (OV), undervoltage (UV), overcurrent (OC), open-sense-line detection, and thermal shutdown at 160°C - Delivers comprehensive fault coverage for microprocessor safety and system reliability.

Pinout & Package

ISL6322IRZ is housed in a 48-lead 7×7 mm QFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN6328 Rev 2.00 datasheet (pages 2, 10–11).

Pin/Terminal	Circuit Role	Design Meaning
VCC	Bias supply input	+5V ±5% supply for internal logic; requires 0.1 µF ceramic decoupling - powers small-signal circuitry independently of power-stage rails.
PVCC1_2 / PVCC3	Gate drive power supply	+5V to +12V programmable bias for upper/lower MOSFET drivers - sets gate drive strength and influences switching speed and shoot-through immunity.
VID0–VID7	DAC reference inputs	8-bit TTL-compatible inputs decoded per Intel VR10/VR11 or AMD DAC tables - determine target output voltage under microprocessor command.
VSEN / RGND	Remote sense differential pair	Connects directly to CPU VDD/VSS sense points - enables precision regulation by compensating for PCB IR drop between regulator and load.
ISEN1±–ISEN4±	Channel current sense inputs	Differential inputs for DCR-based inductor current monitoring - provides real-time per-phase current data for balancing, protection, and droop control.
UGATE1–3 / LGATE1–3	Integrated gate drive outputs	Direct drive outputs for high- and low-side MOSFET gates (Phases 1–3) - eliminates need for external drivers in ≤3-phase configurations.
PWM4 / EN_PH4	Fourth-phase control interface	PWM4: logic-level output to external driver IC; EN_PH4: POR sync and 4-phase enable/disable control - enables flexible scalability to 4-phase topologies.
SCL / SDA / SS/RST/A0	I²C bus interface	Standard bidirectional I²C interface with configurable slave address and register reset function - allows runtime reconfiguration without power cycle.

Key Features

Feature	Design Value
Active Pulse Positioning (APP) Modulation	Enables sub-cycle PWM edge placement for immediate response to high di/dt load steps - reduces peak voltage deviation by up to 40% vs. conventional fixed-frequency PWM during 10–90% load transients.
Adaptive Phase Alignment (APA)	Temporarily aligns all active phase PWM edges during large-step transients - increases instantaneous current delivery capacity and minimizes required bulk capacitance.
Differential Remote Voltage Sensing	Compensates for voltage drop across PCB traces and connectors - maintains ±0.5% regulation accuracy at the CPU die despite >100 mΩ path resistance.
User-Selectable Adaptive Dead Time	Choice between PHASE-detect or LGATE-detect schemes - optimizes shoot-through prevention for diverse MOSFET gate charge profiles and layout parasitics.
Dynamic VID Technology Support	Real-time DAC table switching between Intel VR10, VR11, and AMD modes - enables single-controller support for heterogeneous processor platforms and firmware-upgradable voltage profiles.

Applications

Server CPU Power Delivery	Workstation GPU Core Regulation
Use Scenario: Regulating 0.8–1.5 V core voltage for dual-socket Xeon or EPYC processors under dynamic 100–300 A loads. IC Role / Device Role / Timing Role: Four-phase PWM controller with integrated drivers, managing phase interleaving, current balancing, and I²C-based margining for BIOS/runtime tuning. Use Value: Achieves <15 mV load-transient deviation and <±0.5% DC accuracy across -40°C to +85°C - meets Intel VR11 spec requirements for enterprise compute platforms.	Use Scenario: Delivering tightly regulated 0.9–1.2 V to high-end discrete GPUs (e.g., NVIDIA A100, AMD MI250X) with aggressive di/dt demands (>200 A/µs). IC Role / Device Role / Timing Role: Precision multiphase controller implementing APP modulation and APA to suppress voltage droop during shader clock bursts. Use Value: Reduces required output capacitance by 35% versus non-APP controllers while maintaining <10 mV undershoot - lowers BOM cost and board area.
Communications Baseband Processor Supply	Industrial Embedded MPU Power
Use Scenario: Powering ARM-based baseband SoCs (e.g., Qualcomm Snapdragon X70) in 5G radio units requiring low-noise, thermally robust 1.0–1.2 V supplies. IC Role / Device Role / Timing Role: Dual- or triple-phase controller with differential remote sensing and thermal shutdown at 160°C - ensures stable operation in sealed, convection-limited enclosures. Use Value: Maintains regulation integrity despite 40°C ambient rise and 15°C local hotspot - eliminates need for forced-air cooling in outdoor macro-cell deployments.	Use Scenario: Providing 1.1 V core rail to industrial-grade i.MX8 or AM65x processors in factory automation PLCs operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: Robust four-phase controller with -40°C to +85°C rating, open-sense-line protection, and Pb-free RoHS compliance - meets IPC-610 Class 3 reliability standards. Use Value: Eliminates field failures due to trace corrosion or connector oxidation by validating remote sense continuity - extends mean time between failures (MTBF) beyond 10 years.

Server CPU Power Delivery

Workstation GPU Core Regulation

Use Scenario: Regulating 0.8–1.5 V core voltage for dual-socket Xeon or EPYC processors under dynamic 100–300 A loads.

IC Role / Device Role / Timing Role: Four-phase PWM controller with integrated drivers, managing phase interleaving, current balancing, and I²C-based margining for BIOS/runtime tuning.

Use Value: Achieves <15 mV load-transient deviation and <±0.5% DC accuracy across -40°C to +85°C - meets Intel VR11 spec requirements for enterprise compute platforms.

Use Scenario: Delivering tightly regulated 0.9–1.2 V to high-end discrete GPUs (e.g., NVIDIA A100, AMD MI250X) with aggressive di/dt demands (>200 A/µs).

IC Role / Device Role / Timing Role: Precision multiphase controller implementing APP modulation and APA to suppress voltage droop during shader clock bursts.

Use Value: Reduces required output capacitance by 35% versus non-APP controllers while maintaining <10 mV undershoot - lowers BOM cost and board area.

Communications Baseband Processor Supply

Industrial Embedded MPU Power

Use Scenario: Powering ARM-based baseband SoCs (e.g., Qualcomm Snapdragon X70) in 5G radio units requiring low-noise, thermally robust 1.0–1.2 V supplies.

IC Role / Device Role / Timing Role: Dual- or triple-phase controller with differential remote sensing and thermal shutdown at 160°C - ensures stable operation in sealed, convection-limited enclosures.

Use Value: Maintains regulation integrity despite 40°C ambient rise and 15°C local hotspot - eliminates need for forced-air cooling in outdoor macro-cell deployments.

Use Scenario: Providing 1.1 V core rail to industrial-grade i.MX8 or AM65x processors in factory automation PLCs operating continuously at 70°C ambient.

IC Role / Device Role / Timing Role: Robust four-phase controller with -40°C to +85°C rating, open-sense-line protection, and Pb-free RoHS compliance - meets IPC-610 Class 3 reliability standards.

Use Value: Eliminates field failures due to trace corrosion or connector oxidation by validating remote sense continuity - extends mean time between failures (MTBF) beyond 10 years.

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	Enhanced version with improved thermal performance (θJC = 2.0°C/W vs. 2.5°C/W), identical pinout and feature set - adds faster soft-start ramp and tighter current-sense tolerance (±1.5% vs. ±2.5%).	Preferred for high-density, thermally constrained designs where junction temperature must stay below 135°C under full 4-phase load.	Select ISL6323IRZ when upgrading legacy ISL6322IRZ designs for improved thermal headroom and tighter current-sense accuracy - drop-in compatible with no layout change.
RT8803AGQW	4-phase controller with integrated drivers, but lacks I²C interface and differential remote sensing - uses single-ended FB and supports only Intel VR12.0/VR12.5, not AMD or VR11.	Suitable for cost-sensitive client-platform designs where remote sensing and multi-processor compatibility are unnecessary.	Choose RT8803AGQW for entry-level desktop motherboards targeting Intel-only platforms with simplified firmware - requires redesign of sense network and I²C management logic.

Compared with ISL6322IRZ, ISL6323IRZ offers superior thermal efficiency and tighter current-sense accuracy while maintaining full functional and mechanical compatibility; RT8803AGQW provides lower system cost but sacrifices I²C configurability, AMD support, and precision remote sensing - making it unsuitable for server or heterogeneous processor applications.

Availability

ISL6322IRZ is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU core regulation, communications baseband processor supply, and industrial embedded MPU power requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ISL6322IRZ 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 continues to manufacture and support its high-performance analog and power management portfolio, including multiphase controllers for advanced computing platforms.

The ISL6322IRZ belongs to Renesas' VR10/VR11/AMD-compliant multiphase controller product line, engineered specifically for high-efficiency, high-accuracy core voltage regulation in x86 and ARM-based servers, workstations, and communications infrastructure.

FAQ

What is the operating temperature range of the ISL6322IRZ?

The ISL6322IRZ is rated for an ambient operating temperature range of -40°C to +85°C, as confirmed in the FN6328 datasheet ordering information table and absolute maximum ratings section. This industrial-grade specification makes the ISL6322IRZ suitable for deployment in servers, telecom equipment, and ruggedized embedded systems where extended thermal performance is required. The device incorporates thermal shutdown at 160°C junction temperature to protect against sustained overtemperature conditions.

Does the ISL6322IRZ support both Intel and AMD microprocessor voltage identification protocols?

Yes, the ISL6322IRZ natively supports Intel VR10, VR11, and AMD voltage identification protocols through its programmable VRSEL pin and internal DAC architecture. By setting VRSEL to <0.6V, 0.6–3.0V, or >3.0V, the controller selects Intel VR10, VR11, or AMD mode respectively - enabling seamless integration into heterogeneous platform designs. The ISL6322IRZ also supports AMD 5-bit and 6-bit DAC tables and Intel Extended VR10/VR11 formats as documented in the datasheet's Functional Pin Description and DAC sections.

How does the ISL6322IRZ achieve precise current balancing across four phases?

The ISL6322IRZ achieves precise current balancing using fully differential, continuous DCR current sensing on all four channels (ISEN1±–ISEN4±), combined with patented cycle-by-cycle averaging and error correction. Each channel's sensed current is compared to the average current (IAVG), and pulse-width adjustments are applied dynamically to force channel currents to match within ±2.5% tolerance. This method is validated in the Electrical Specifications table (page 8) and described in detail in the "Channel-Current Balance" section (pages 12–13) of the FN6328 datasheet.

Can the ISL6322IRZ operate in 4-phase mode without external components?

No, the ISL6322IRZ requires external PWM drivers for true 4-phase operation. Its integrated drivers support only Phases 1–3 directly via UGATE1–3 and LGATE1–3 pins; the fourth phase is controlled via the PWM4 output signal, which must be routed to an external driver IC such as the ISL6612. The datasheet explicitly states: "4-Phase Operation with External PWM Driver Signal" in the Features list (page 1), and the Typical Application schematic (page 5) shows ISL6612 driven by PWM4. Leaving PVCC3 unconnected configures the device for 2-phase mode.

What protection features are built into the ISL6322IRZ?

The ISL6322IRZ integrates comprehensive protection including multi-tiered overvoltage (OV) and undervoltage (UV) detection on the VSEN input, per-channel and average overcurrent (OC) trip with dynamic VID-aware thresholds, open-sense-line prevention, thermal shutdown at 160°C with 100°C hysteresis, and shoot-through protection on all gate drive outputs. These features are detailed in the "Protection Features" subsection (page 1) and Electrical Specifications table (pages 7–9) of the FN6328 datasheet, with OV thresholds programmable via I²C interface.

ISL6322IRZ 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:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-QFN (7x7)

ISL6322IRZ FAQ

1.How can I place an order for ISL6322IRZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL6322IRZ 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 ISL6322IRZ reliable?

The price and inventory of ISL6322IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6322IRZ is usually 5 days.

3.What payment methods are accepted for ISL6322IRZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6322IRZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ISL6322IRZ?

ISL6322IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL6322IRZ 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 ISL6322IRZ?

For technical support, including ISL6322IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6322IRZ requirements.

6.How does Aetrix verify that ISL6322IRZ is sourced from the original manufacturer or authorized distributors?

All ISL6322IRZ 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 ISL6322IRZ meets industry standards.

7.What is the process for return or replacement of ISL6322IRZ?

All ISL6322IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6322IRZ, 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 ISL6322IRZ part is unused and in its original packaging.

Return procedure for ISL6322IRZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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