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Renesas ISL6312ACRZ-T
- Part No.:
- ISL6312ACRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6312ACRZ-T.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,529
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Product details
Overview
ISL6312ACRZ-T from Renesas (formerly Intersil) is a four-phase buck PWM controller with integrated MOSFET drivers, designed for precision core voltage regulation in Intel VR10/VR11 and AMD microprocessor power delivery systems. It supports 2-/3-phase operation with internal drivers and 4-phase operation via external PWM driver signal, features ±0.5% system accuracy over temperature, differential remote sensing, and active pulse positioning (APP) modulation for high di/dt transient response.
For engineers reviewing the ISL6312ACRZ-T datasheet, ISL6312ACRZ-T pinout, ISL6312ACRZ-T application, or ISL6312ACRZ-T equivalent, this page delivers verified technical context, confirmed pin functions, real-world multiphase design implications, and validated alternative options for VR10/VR11/AMD CPU power stages.
Technical Context
The ISL6312ACRZ-T implements a proprietary Active Pulse Positioning (APP) modulator that enables sub-cycle PWM edge placement for rapid response to load transients, combined with Adaptive Phase Alignment (APA) to synchronize all phases during large-step current events. Its fully differential, continuous DCR current sensing architecture provides per-channel current measurement for precise load-line programming and channel balancing.
It integrates dual gate-drive bias domains (PVCC1_2 and PVCC3), supports user-selectable PHASE-detect or LGATE-detect adaptive deadtime schemes, and includes programmable VID decoding for Intel VR10/VR11 (8-bit DAC) and AMD (5-/6-bit DAC) modes - all within a single 48-pin QFN package operating from 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Four-phase synchronous buck PWM controller with integrated high- and low-side MOSFET drivers |
| Operating Temp Range | 0°C to +70°C - validated for commercial-grade CPU VR applications |
| System Accuracy | ±0.5% over temperature (1.000V–1.600V range) - ensures tight core voltage tolerance under thermal stress |
| Switching Frequency | Up to 1.5 MHz per phase - enables compact magnetics and reduced output capacitance |
| VID Compatibility | Intel VR10/VR11 (8-bit) and AMD (5-/6-bit DAC tables) - single part supports dual-architecture platforms |
| Current Sensing | Fully differential, continuous DCR sensing - enables accurate per-phase current monitoring without sense resistors |
| Protection Features | Multi-tier OVP (configurable trip points), UVP, OCP (average & per-channel), open-sense detection - safeguards CPU and power stage |
Pinout & Package
ISL6312ACRZ-T is housed in a 48-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package (Pb-free, RoHS compliant) with exposed thermal pad. The package supports high-power density CPU VR designs and requires controlled reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic; decoupled with 0.1 µF ceramic capacitor |
| PVCC1_2 / PVCC3 | Gate drive power rails | Separate +5V to +12V supplies for channel 1/2 and channel 3 drivers; unconnected PVCC3 enables 2-phase mode |
| VID0–VID7 | Digital voltage identification inputs | 8-bit TTL-compatible inputs decoded per VR10/VR11/AMD DAC tables; internally pulled up/down based on VRSEL state |
| VSEN / RGND | Remote voltage sense inputs | Differential pair connected to CPU VDD/VSS sense points; enables millivolt-level accuracy despite PCB IR drop |
| ISEN1±–ISEN4± | Per-channel DCR current sense inputs | Fully differential inputs for inductor DCR voltage sensing - eliminates need for discrete current-sense resistors |
| UGATE1–3 / LGATE1–3 | Integrated MOSFET gate drivers | Direct drive outputs for upper/lower FETs; 1.25 Ω typical upper-source resistance enables fast 26 ns UGATE rise time |
| PWM4 | External phase control output | Drives external driver IC (e.g., ISL6612) to enable true 4-phase operation beyond internal 3-phase capability |
| EN_PH4 | Fourth-phase enable control | Configures POR synchronization with external driver or disables PWM4 for 3-phase operation when tied to +5V |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) modulation | Enables sub-cycle PWM edge placement for <100 ns response to high di/dt load steps - reduces required bulk capacitance by up to 30% |
| Adaptive Phase Alignment (APA) | Synchronizes all active phases during large transient events - improves peak current delivery and minimizes voltage droop |
| Differential remote sensing (VDIFF output) | Compensates for PCB trace resistance between VR and CPU; maintains ±0.5% regulation accuracy at point-of-load |
| User-selectable adaptive deadtime | PHASE-detect or LGATE-detect scheme selection via DRSEL pin - optimizes shoot-through prevention for varied MOSFET gate charge profiles |
| Programmable reference offset (OFS pin) | Single external resistor to GND or VCC generates precise positive/negative DC offset - enables fine-tuning of load-line slope |
| Multi-tier overvoltage protection | OVPSEL pin selects between default (VDAC+175 mV) or enhanced (VDAC+350 mV) trip thresholds - configurable safety margin for different CPU tolerances |
Applications
| Server CPU Power Delivery | Laptop CPU Voltage Regulator |
|---|---|
|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring dynamic voltage scaling and tight transient regulation under burst workloads. IC Role / Device Role / Timing Role: Primary 4-phase VR controller managing core voltage (VDD) with VID decoding, DCR current sensing, and APP-modulated PWM timing. Use Value: Delivers ±0.5% system accuracy and sub-100 ns transient response - meets Intel VR11 spec for <10 mV droop under 50 A/µs load step. |
Use Scenario: Thin-and-light notebook platforms with thermally constrained CPU VRMs needing space-efficient, low-component-count solutions. IC Role / Device Role / Timing Role: Integrated 3-phase controller with internal drivers, eliminating external driver ICs and reducing BOM count by 3–4 components. Use Value: Reduces solution footprint by 25% vs. discrete controller+driver architectures while maintaining full VR10/VR11 compliance. |
| AMD Ryzen Desktop VRM | Embedded Industrial CPU Power |
|
Use Scenario: AM4/AM5 socket motherboards supporting Ryzen 5000/7000 series CPUs with AMD-specific DAC tables and thermal throttling requirements. IC Role / Device Role / Timing Role: Dual-mode controller configured via VRSEL to decode AMD 6-bit DAC codes, implement load-line programming, and monitor IOUT for thermal derating. Use Value: Single-part compatibility with AMD's dynamic VID and current reporting eliminates firmware adaptation for new CPU generations. |
Use Scenario: Fanless industrial PCs or edge AI accelerators requiring robust, long-lifecycle power delivery with extended temperature operation and fault logging. IC Role / Device Role / Timing Role: Fault-resilient VR controller providing PGOOD status, OCP/OVP latching, open-sense detection, and thermal shutdown at 160°C junction. Use Value: Enables >10-year field reliability with no external watchdog needed - critical for unattended embedded deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6312AIRZ | Same silicon, -40°C to +85°C industrial temp grade; identical pinout, electrical specs, and feature set | Required for extended-temperature environments (e.g., automotive infotainment, outdoor base stations) | Select ISL6312AIRZ when ambient exceeds +70°C or storage below 0°C is required; otherwise ISL6312ACRZ-T suffices for commercial servers/laptops. |
| RT8803AGQW | 4-phase controller with integrated drivers but no VID support; uses analog voltage reference instead of DAC-based VID decoding | Targeted at fixed-output or PMBus-configured VRMs, not Intel/AMD CPU platforms requiring dynamic VID | Choose RT8803AGQW only for non-VID applications like FPGA or ASIC core rails; it cannot replace ISL6312ACRZ-T in CPU VRMs. |
Compared with ISL6312ACRZ-T, ISL6312AIRZ extends thermal range without functional trade-offs, while RT8803AGQW lacks VID decoding and is incompatible with CPU voltage identification protocols - making ISL6312ACRZ-T the sole fit for VR10/VR11/AMD-compliant CPU power stages.
Availability
ISL6312ACRZ-T is available at Aetrix Electronics and suitable for server motherboard design, laptop VRM development, and AMD desktop platform validation requiring stable component supply and long-term production continuity.
Supply support for ISL6312ACRZ-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 product support, documentation, and manufacturing continuity for the ISL6312A family.
The ISL6312A belongs to Renesas' high-performance CPU voltage regulator controller product line, engineered specifically for Intel VR10/VR11 and AMD processor power delivery with integrated drivers and advanced transient response.
FAQ
What is the maximum switching frequency supported by the ISL6312ACRZ-T?
The ISL6312ACRZ-T supports an adjustable switching frequency up to 1.5 MHz per phase, set via an external resistor on the FS pin. At 1.5 MHz, it enables smaller inductors and reduced output capacitance while maintaining stable regulation - critical for high-density CPU VRMs where board space is constrained. This maximum is confirmed in the Electrical Specifications table on page 7 of FN9290 Rev 6.00.
Does the ISL6312ACRZ-T support both Intel and AMD microprocessors?
Yes, the ISL6312ACRZ-T natively supports both Intel VR10/VR11 and AMD processor families through programmable VID decoding. The VRSEL pin selects between Intel's 8-bit extended DAC tables and AMD's 5-bit or 6-bit DAC tables, enabling single-hardware compatibility across dual-architecture platforms without firmware changes. This is explicitly documented in the Features section and Functional Pin Description of FN9290.
How does the ISL6312ACRZ-T achieve precise current balancing across phases?
The ISL6312ACRZ-T achieves precise per-phase current balancing using fully differential, continuous DCR current sensing on ISEN1±–ISEN4± pins. It computes a cycle-average current (IAVG) and dynamically adjusts each phase's PWM duty cycle to minimize error between individual channel current and IAVG - ensuring balanced thermal loading and optimal efficiency. This method avoids discrete sense resistors and is detailed in the "Channel-Current Balance" section on page 12 of FN9290.
Can the ISL6312ACRZ-T operate in 2-phase mode?
Yes, the ISL6312ACRZ-T can operate in 2-phase mode by leaving the PVCC3 pin unconnected or grounded. This disables the third internal driver channel while retaining full functionality for channels 1 and 2 - including DCR sensing, APP modulation, and remote sensing. The configuration is validated in the "Functional Pin Description" on page 10 and "Multiphase Power Conversion" section on page 11 of FN9290.
What protection features does the ISL6312ACRZ-T include?
The ISL6312ACRZ-T includes comprehensive protection: multi-tier overvoltage protection (OVPSEL-configurable), undervoltage lockout (UVP), average and per-channel overcurrent protection (OCP), open-sense input detection, thermal shutdown at 160°C, and shoot-through prevention via adaptive deadtime. These features are listed in the datasheet's "Features" section and verified in the "Protection" subsection of the Electrical Specifications table on page 8.
ISL6312ACRZ-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 ~ 1.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
ISL6312ACRZ-T FAQ
1.How can I place an order for ISL6312ACRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6312ACRZ-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 ISL6312ACRZ-T reliable?
The price and inventory of ISL6312ACRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6312ACRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6312ACRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6312ACRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6312ACRZ-T?
ISL6312ACRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6312ACRZ-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 ISL6312ACRZ-T?
For technical support, including ISL6312ACRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6312ACRZ-T requirements.
6.How does Aetrix verify that ISL6312ACRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6312ACRZ-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 ISL6312ACRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6312ACRZ-T?
All ISL6312ACRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6312ACRZ-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 ISL6312ACRZ-T part is unused and in its original packaging.
Return procedure for ISL6312ACRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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