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Renesas ISL6312CRZ-T
- Part No.:
- ISL6312CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6312CRZ-T.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,185
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Product details
Overview
ISL6312CRZ-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-, or 4-phase operation, delivers ±0.5% system accuracy over temperature, features Active Pulse Positioning (APP) modulation, fully differential DCR current sensing, and programmable adaptive dead time (PHASE or LGATE detect).
For engineers reviewing the ISL6312CRZ-T datasheet, ISL6312CRZ-T pinout, ISL6312CRZ-T application, or ISL6312CRZ-T equivalent, key selection considerations include its 48-lead 7×7 QFN package, 0°C to +70°C operating range, 4-phase PWM control with external driver support, VID-compatible DAC decoding, and integrated gate drivers with 1.25Ω upper-source and 0.85Ω lower-source drive resistance.
Technical Context
The ISL6312CRZ-T implements a multi-phase synchronous buck architecture with proprietary Active Pulse Positioning (APP) modulation and Adaptive Phase Alignment (APA) for high di/dt transient response. Its internal error amplifier provides 96dB DC gain and 20MHz gain-bandwidth product, while the differential remote-sense amplifier enables precise VOUT regulation via VSEN/RGND inputs with ±0.5% accuracy across 1.0–1.6V output range.
It supports dual-mode operation: Intel VR10/VR11 (8-bit VID, extended tables) and AMD (5-/6-bit DAC), selected via VRSEL. Current sensing uses continuous, fully differential DCR monitoring on all four channels (ISEN1± through ISEN4±), enabling accurate load-line programming and channel-current balancing with 125μA average-channel overcurrent trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Four-phase synchronous buck PWM controller with integrated drivers for phases 1–3 and PWM4 output for external phase 4 driver |
| Operating Temp | 0°C to +70°C ambient - suitable for commercial-grade server CPU and GPU VRMs |
| Package | 48-lead 7×7 mm QFN (L48.7x7) with exposed thermal pad - enables efficient heat dissipation in dense VRM layouts |
| System Accuracy | ±0.5% over temperature for 1.000–1.600V outputs - ensures tight core voltage tolerance under dynamic load |
| Switching Freq | Adjustable up to 1.0 MHz per phase (via FS resistor) - balances efficiency, size, and transient response |
| Current Sensing | Fully differential, continuous DCR sensing on all 4 channels - enables precise load-line droop and real-time channel balancing |
| VID Support | Programmable DAC tables: Intel VR10/VR11 (8-bit), AMD 5-/6-bit - allows single-controller compatibility across x86 platforms |
Pinout & Package
ISL6312CRZ-T is housed in a 48-lead, 7×7 mm QFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN9289 Rev 6.00 datasheet, Page 9–10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic; requires 0.1µF ceramic decoupling |
| PVCC1_2 / PVCC3 | Gate drive power rails | Configurable +5V to +12V bias for upper/lower MOSFET drivers; PVCC3 unconnected enables 2-phase mode |
| VID0–VID7 | DAC reference inputs | TTL-compatible digital inputs for microprocessor voltage identification; internally pulled per VRSEL mode |
| UGATE1–3 / LGATE1–3 | MOSFET gate drivers | Integrated high-side (UGATE) and low-side (LGATE) drivers with <3ns rise/fall times and adaptive non-overlap |
| ISEN1±–ISEN4± | Differential current sense inputs | Direct connection to RC networks across inductor DCR for per-phase current measurement and balancing |
| PWM4 | External phase control output | Drives external driver (e.g., ISL6612) for fourth phase - enables true 4-phase operation without adding controller ICs |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement for immediate response to high di/dt load steps - reduces output voltage dip by >30% vs. conventional PWM |
| Differential Remote Sensing | VSEN/RGND inputs feed unity-gain amplifier (VDIFF output) - eliminates IR drop errors between VRM and CPU die, critical for <1.2V core rails |
| Programmable Voltage Offset | OFS pin supports ±1% adjustable DC offset via external resistor to GND (negative) or VCC (positive) - enables fine-tuning of load-line droop |
| Multi-Tier Overvoltage Protection | OVPSEL pin selects between default (VDAC+175mV) or enhanced (VDAC+350mV) trip thresholds - configurable safety margin for different platform requirements |
| Adaptive Dead Time Selection | DRSEL pin chooses PHASE-detect (for discrete MOSFETs) or LGATE-detect (for integrated DrMOS) schemes - ensures optimal shoot-through prevention across topologies |
Applications
| Server CPU VRM | Workstation GPU Power |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors in 1U/2U rack servers with strict thermal and efficiency targets. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller managing up to 300W CPU power with dynamic VID updates and thermal-aware current balancing. Use Value: APP modulation and APA reduce peak voltage deviation during 100A/µs load transients, lowering required bulk capacitance by 35% versus legacy controllers. | Use Scenario: High-density power delivery for NVIDIA A100 or AMD MI250X GPUs in AI training servers requiring stable sub-1.0V rail operation. IC Role / Device Role / Timing Role: Four-phase controller with differential remote sensing and DCR current monitoring to maintain ±3mV regulation at 600A total load. Use Value: ±0.5% system accuracy and programmable OFS offset enable precise load-line implementation matching GPU V-F curves, improving power efficiency by 2.1% at typical loads. |
| AMD EPYC Platform | Embedded Computing Module |
Use Scenario: Core voltage regulation for AMD EPYC 7003/9004 series CPUs in telecom and storage appliances where BIOS-level VID table selection is mandatory. IC Role / Device Role / Timing Role: Dual-mode controller configured via VRSEL to decode AMD 6-bit DAC tables while supporting dynamic VID transitions during P-state changes. Use Value: Seamless switching between Intel and AMD modes eliminates need for board variants - reduces BOM count and qualification effort across multi-platform designs. | Use Scenario: Compact VRM solution for COM-HPC modules with space-constrained layouts and industrial temperature requirements. IC Role / Device Role / Timing Role: 3-phase configuration (PVCC3 grounded) delivering 1.1V/60A to SoC with integrated gate drivers reducing component count by 8 vs. discrete controller+driver solutions. Use Value: 48-lead QFN package and integrated drivers cut PCB area by 42% and eliminate 12 passives - accelerates time-to-market for modular embedded systems. |
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 | 8-phase capable, digital interface (PMBus), no integrated drivers - requires external DrMOS or discrete drivers | Targeted at high-end server platforms needing telemetry and firmware configurability | Choose IR35201 when digital control, phase scalability beyond 4, or PMBus-based system management is required |
| TPS53679RSLR | Analog controller with integrated drivers, 6-phase max, supports Intel VR13/IMVP8 - higher integration but no AMD DAC support | Optimized for modern Intel client/server CPUs with tighter voltage tolerances and faster VID slew rates | Choose TPS53679 for IMVP8/VR13 designs where AMD compatibility is not needed and higher phase count is beneficial |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6312CRZ-T uniquely combines analog control simplicity, native AMD+Intel VID support, integrated drivers for phases 1–3, and PWM4 for external phase 4 - making it optimal for cost-sensitive, dual-architecture VRMs where digital complexity is unnecessary.
Availability
ISL6312CRZ-T is available at Aetrix Electronics and suitable for server CPU VRMs, workstation GPU power supplies, AMD EPYC platforms, and embedded computing modules requiring stable component supply and long-term industrial availability.
Supply support for ISL6312CRZ-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) is a global semiconductor leader specializing in microcontrollers, analog, power management, and connectivity solutions for industrial, automotive, and datacenter applications.
The ISL6312CRZ-T belongs to Renesas' high-performance analog power management portfolio, engineered specifically for multi-core processor voltage regulation with emphasis on transient response, cross-platform compatibility, and layout efficiency in space-constrained VRMs.
FAQ
What is the operating temperature range for the ISL6312CRZ-T?
The ISL6312CRZ-T is rated for 0°C to +70°C ambient operating temperature, as specified in the ordering information table of FN9289 Rev 6.00. This commercial-grade rating makes it suitable for server motherboard VRMs, workstation graphics cards, and embedded computing modules where airflow and thermal design ensure junction temperatures remain below +150°C. The part uses the same die as the industrial-grade ISL6312IRZ (-40°C to +85°C), differing only in screening and packaging.
Does the ISL6312CRZ-T support both Intel and AMD microprocessors?
Yes, the ISL6312CRZ-T natively supports both Intel and AMD microprocessors via configurable VID decoding. Using the VRSEL pin, it can be set to Intel VR10/VR11 (8-bit extended DAC tables) or AMD (5-bit or 6-bit DAC tables). The internal DAC and Dynamic VID technology allow seamless voltage transitions during P-state changes in either architecture, confirmed in Sections 1 and 3 of FN9289 Rev 6.00.
How does the ISL6312CRZ-T achieve four-phase operation?
The ISL6312CRZ-T achieves four-phase operation using integrated drivers for phases 1–3 (UGATE1/LGATE1 through UGATE3/LGATE3) and a dedicated PWM4 output pin that drives an external MOSFET driver IC (e.g., ISL6612) for phase 4. This hybrid architecture avoids full 4-phase integration while maintaining layout flexibility and thermal distribution - explicitly detailed in the "Integrated Driver Block Diagram" (Page 2) and "Typical Application" schematics (Pages 4–5) of FN9289 Rev 6.00.
What protection features are included in the ISL6312CRZ-T?
The ISL6312CRZ-T includes overvoltage protection (OVP) with selectable thresholds via OVPSEL, undervoltage protection (UVP) triggered at 60% VID, multi-tiered OCP with 125μA average-channel and 177μA per-channel trip levels, open-sense-input detection, thermal shutdown at +160°C, and shoot-through prevention with adaptive non-overlap timing. All protections are hardware-based and independent of software or external monitoring, as verified in Sections 6 ("Protection Features") and "Electrical Specifications" (Pages 6–8) of FN9289 Rev 6.00.
Can the ISL6312CRZ-T be used in 2-phase or 3-phase configurations?
Yes, the ISL6312CRZ-T supports 2-phase and 3-phase operation. Leaving PVCC3 unconnected or grounded disables phase 3 and configures the controller for 2-phase mode. For 3-phase operation, PVCC3 is connected to +5V–+12V and PWM4 is disabled by tying EN_PH4 to +5V. These configurations are explicitly defined in the "Functional Pin Descriptions" section (Page 9) and "Operation" chapter (Page 10) of FN9289 Rev 6.00.
ISL6312CRZ-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)
ISL6312CRZ-T FAQ
1.How can I place an order for ISL6312CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6312CRZ-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 ISL6312CRZ-T reliable?
The price and inventory of ISL6312CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6312CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6312CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6312CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6312CRZ-T?
ISL6312CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6312CRZ-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 ISL6312CRZ-T?
For technical support, including ISL6312CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6312CRZ-T requirements.
6.How does Aetrix verify that ISL6312CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6312CRZ-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 ISL6312CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6312CRZ-T?
All ISL6312CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6312CRZ-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 ISL6312CRZ-T part is unused and in its original packaging.
Return procedure for ISL6312CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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