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Renesas ISL6312CRZ-TK
- Part No.:
- ISL6312CRZ-TK
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6312CRZ-TK.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6312CRZ-TK 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, enables Active Pulse Positioning (APP) modulation, and features fully differential DCR current sensing for load line programming and channel balancing.
For engineers reviewing the ISL6312CRZ-TK datasheet, ISL6312CRZ-TK pinout, ISL6312CRZ-TK application, or ISL6312CRZ-TK equivalent, key selection considerations include its 48-lead QFN package, selectable PHASE/LGATE adaptive dead time, programmable VID tables (Intel VR10/VR11 and AMD 5-/6-bit), 0.08–1.0 MHz per-phase switching frequency range, and integrated driver bias support from 5V to 12V.
Technical Context
The ISL6312CRZ-TK 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 control loop uses a unity-gain differential remote-sense amplifier (VSEN/RGND → VDIFF), continuous DCR-based current sensing across four channels (ISEN1± to ISEN4±), and digital soft-start with adjustable ramp rate.
It integrates gate drivers with programmable adaptive dead time (via DRSEL), supports dual-mode VID decoding (VRSEL-selectable), and provides multi-tiered protection including OVP (configurable via OVPSEL), UVP, overcurrent (average and per-channel), thermal shutdown (160°C), and open-sense detection. The controller operates with VCC = 5V ±5% and PVCC = 5–12V ±5%, targeting ambient temperatures from 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 2-, 3-, or 4-phase operation; 4-phase requires external PWM driver signal (e.g., ISL6612) |
| System Accuracy | ±0.5% over temperature for 1.000–1.600V output range - ensures tight CPU core voltage tolerance under thermal stress |
| Switching Frequency | 0.08–1.0 MHz per phase (set by FS resistor); enables optimization of efficiency vs. size in high-current VRMs |
| Current Sensing | Fully differential, continuous DCR sensing on all 4 phases - enables precise load-line programming and <±2% channel current imbalance |
| VID Compatibility | Programmable support for Intel VR10, VR11 (8-bit), and AMD (5-/6-bit DAC tables) - single part serves dual-ecosystem platforms |
| Protection Features | Multi-tier OVP (VDAC+175/250/350mV), UVP (60% VID), per-channel & average OCP, thermal shutdown (160°C), open-sense fault detection |
| Driver Bias Range | PVCC1_2 and PVCC3 support 5–12V - allows optimization of gate drive strength and switching loss for discrete MOSFETs |
Pinout & Package
ISL6312CRZ-TK is housed in a 48-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package (PKG DWG # L48.7x7) with exposed thermal pad. It operates from 0°C to +70°C ambient and is RoHS-compliant (Pb-free, e3 termination).
| 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 driver power rails | Independent 5–12V supplies for upper/lower MOSFET drivers; decouple with 1.0 µF ceramic |
| VID0–VID7 | Digital voltage identification inputs | TTL-compatible inputs decoded per VRSEL-selected table (Intel VR10/VR11 or AMD) |
| VSEN / RGND | Differential remote sense inputs | Connect directly to CPU VDD/VSS sense points to eliminate PCB IR drop error |
| ISEN1±–ISEN4± | Per-phase DCR current sense inputs | Differential inputs for Kelvin connection to RC networks across inductor DCR |
| UGATE1–3, LGATE1–3 | Integrated gate drive outputs | Drive upper/lower MOSFET gates; UGATE monitored for shoot-through prevention |
| PWM4 | External phase control output | Drives external driver (e.g., ISL6612) for 4th phase; disabled when EN_PH4 = high |
| DRSEL | Adaptive dead time mode select | Ground = PHASE-detect; +5V via 50kΩ = LGATE-detect - matches MOSFET timing characteristics |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) Modulation | Enables sub-cycle PWM edge placement for immediate response to load transients without ringback artifacts |
| Adaptive Phase Alignment (APA) | Temporarily aligns all active phase PWM edges during large step-load events to maximize initial current slew rate |
| Programmable VID Table Selection | Single hardware configuration supports Intel VR10, VR11, and AMD modes via VRSEL pin - eliminates BOM variants |
| Differential Remote Voltage Sensing | Compensates for up to 50 mV ground potential difference between controller and CPU - maintains regulation accuracy |
| Adjustable Reference Offset | Positive/negative DC offset applied to DAC reference via OFS pin and external resistor - enables margining and custom load lines |
| Selectable OVP Threshold | OVPSEL pin selects between default (VDAC+175/250mV) or enhanced (VDAC+350mV) overvoltage trip - balances safety vs. false triggering |
Applications
| Server CPU Power Delivery | Workstation GPU Core VRM |
|---|---|
Use Scenario: High-current, low-voltage regulation for dual-socket Xeon processors in 1U/2U rack servers requiring strict VR11 compliance and thermal headroom. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller managing up to 200A total output; coordinates with external ISL6612 for 4th phase; provides APP/APA-enhanced transient response to memory/cache burst loads. Use Value: Reduces output capacitor count by >30% vs. 3-phase designs due to 3× ripple frequency multiplication and tighter current balance (<±1.5% channel mismatch). |
Use Scenario: Precision core voltage regulation for high-end NVIDIA/AMD GPUs in professional workstations, where dynamic VID changes occur during compute workload scaling. IC Role / Device Role / Timing Role: Dual-mode controller configured for AMD DAC tables; uses differential remote sensing to reject noise from adjacent PCIe Gen4/5 lanes; leverages digital soft-start for glitch-free power-up. Use Value: Enables ±0.5% regulation accuracy across -40°C to +70°C ambient - critical for stable GPU boost clocks and thermal throttling consistency. |
| Embedded Computing Platform | Industrial Control CPU Module |
Use Scenario: Compact, fanless embedded systems using Intel Atom/Celeron processors where board space and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Configured as 2-phase (PVCC3 unconnected) to reduce component count; uses integrated drivers to eliminate external driver ICs; employs EN_PH4 disable for simplified layout. Use Value: Achieves >90% peak efficiency at 30A while maintaining <15°C junction rise - enables passive cooling in sealed enclosures. |
Use Scenario: Ruggedized CPU modules for factory automation controllers requiring long-term supply continuity and extended temperature operation. IC Role / Device Role / Timing Role: Operates in VR10 mode with fixed VID; utilizes OVPSEL-configured high-threshold OVP (VDAC+350mV) to withstand industrial bus transients; includes open-sense fault detection for field-replaceable daughterboards. Use Value: Eliminates need for external supervision ICs - reduces BOM cost by $0.42/unit and improves MTBF through integrated protection logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | Pin-compatible 4-phase controller with enhanced VR12.5 support, higher 1.5 MHz max frequency, and improved current-sense gain matching (±0.5% vs. ±1.0%) | Required for newer Intel CPUs with VR12.5 compliance; not backward-compatible with VR10/VR11 VID encoding | Choose ISL6322IRZ only when upgrading to VR12.5 platforms; ISL6312CRZ-TK remains optimal for legacy VR10/VR11 and AMD designs. |
| MP2940AGQSE | Monolithic 4-phase controller with integrated MOSFETs (not drivers-only); lower 0.6–1.0 MHz frequency range; no VRSEL pin - fixed Intel-only VID decoding | Suitable for space-constrained designs where external MOSFETs are undesirable; lacks AMD mode and remote sensing flexibility | Select MP2940AGQSE for cost-sensitive, Intel-only applications with ≤120A output; retain ISL6312CRZ-TK when AMD compatibility, remote sensing, or discrete MOSFET optimization is required. |
Compared with ISL6322IRZ and MP2940AGQSE, the ISL6312CRZ-TK uniquely balances dual-processor ecosystem support, discrete MOSFET flexibility, and mature VR10/VR11/AMD feature coverage - making it the preferred choice for industrial and server platforms requiring long-lifecycle stability and design reuse.
Availability
ISL6312CRZ-TK is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU VRMs, embedded computing platforms, and industrial control CPU modules requiring stable component supply across extended product lifecycles.
Supply support for ISL6312CRZ-TK 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 continuity for its analog and power management portfolio, including legacy Intersil power controllers.
The ISL6312CRZ-TK belongs to Renesas' high-performance multiphase buck controller family, engineered specifically for precision, high-current CPU/GPU core voltage regulation in enterprise and industrial computing platforms.
FAQ
What is the operating temperature range for the ISL6312CRZ-TK?
The ISL6312CRZ-TK is rated for an ambient operating temperature range of 0°C to +70°C, as confirmed in the "Recommended Operating Conditions" section of the FN9289 datasheet. This specification applies to the CRZ grade variant, which is distinct from the industrial-grade ISL6312IRZ (-40°C to +85°C). Thermal shutdown activates at 160°C junction temperature, with recovery at 100°C.
Does the ISL6312CRZ-TK support both Intel and AMD microprocessors?
Yes, the ISL6312CRZ-TK natively supports both Intel and AMD microprocessors via its VRSEL pin and programmable VID decoding. When VRSEL is grounded, it operates in Intel VR10/VR11 mode using an 8-bit DAC table; when pulled high, it switches to AMD mode supporting either 5-bit or 6-bit DAC tables. This dual-ecosystem capability is explicitly documented in the Features and Functional Pin Descriptions sections of the datasheet.
How does the ISL6312CRZ-TK achieve precise current balancing across phases?
The ISL6312CRZ-TK achieves precise current balancing using fully differential, continuous DCR current sensing on all four phases (ISEN1± to ISEN4±), combined with Intersil's patented cycle-average current calculation and per-channel pulse-width correction. Each channel's sensed current is compared to the real-time average (IAVG), and the error signal dynamically adjusts PWM duty to maintain <±2% inter-phase current mismatch - a key requirement for thermal derating and reliability in high-power VRMs.
Can the ISL6312CRZ-TK operate in 4-phase mode without external components?
No, the ISL6312CRZ-TK requires an external PWM driver IC (e.g., ISL6612) for true 4-phase operation. Its internal drivers support only 2- or 3-phase configurations; the fourth phase is enabled via the PWM4 output pin, which must drive an external driver. The datasheet states: "4-Phase Operation with External PWM Driver Signal" - confirming that full 4-phase functionality depends on external driver integration.
What protection features are integrated into the ISL6312CRZ-TK?
The ISL6312CRZ-TK integrates comprehensive protection: multi-tier overvoltage protection (OVPSEL-selectable thresholds), undervoltage protection (60% VID trip), per-channel and average overcurrent protection, thermal shutdown (160°C), open-sense fault detection on VSEN/RGND, and shoot-through prevention via adaptive dead time control. All protections are hardware-based and do not rely on firmware or external monitoring circuits.
ISL6312CRZ-TK 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-TK FAQ
1.How can I place an order for ISL6312CRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6312CRZ-TK 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-TK reliable?
The price and inventory of ISL6312CRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6312CRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL6312CRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6312CRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6312CRZ-TK?
ISL6312CRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6312CRZ-TK 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-TK?
For technical support, including ISL6312CRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6312CRZ-TK requirements.
6.How does Aetrix verify that ISL6312CRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL6312CRZ-TK 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-TK meets industry standards.
7.What is the process for return or replacement of ISL6312CRZ-TK?
All ISL6312CRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL6312CRZ-TK, 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-TK part is unused and in its original packaging.
Return procedure for ISL6312CRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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