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Renesas ISL6312CRZ-TR5312
- Part No.:
- ISL6312CRZ-TR5312
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6312CRZ-TR5312.pdf
- Description:
- IC REG CTRLR VR10 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
ISL6312CRZ-TR5312 from Renesas Electronics (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. It supports 2–4-phase operation, features ±0.5% system accuracy over temperature, differential remote sensing, and Active Pulse Positioning (APP) modulation for high di/dt transient response in server and desktop CPU VRMs.
For engineers reviewing the ISL6312CRZ-TR5312 datasheet, ISL6312CRZ-TR5312 pinout, ISL6312CRZ-TR5312 application, or ISL6312CRZ-TR5312 equivalent, key selection considerations include its 48-pin QFN package, programmable VID DAC tables (Intel VR10/VR11, AMD 5-/6-bit), selectable adaptive dead time (PHASE/LGATE detect), DCR-based current sensing, and 0.08–1.0 MHz per-phase switching frequency range.
Technical Context
The ISL6312CRZ-TR5312 implements a multi-phase synchronous buck architecture with fully differential, continuous DCR current sensing across up to four channels for precise load-line programming and channel current balancing. Its proprietary Active Pulse Positioning (APP) modulation enables sub-cycle response to load transients by dynamically positioning PWM edges within each switching interval.
It integrates gate drivers with programmable bias (5–12 V), supports dual dead-time schemes (PHASE- or LGATE-detect), and includes a unity-gain differential remote-sense amplifier (VSEN/RGND → VDIFF) with adjustable reference offset via OFS pin. The controller decodes 8-bit VID inputs using selectable DAC tables and provides digital soft-start with ramp rate configurable via SS pin.
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 1.0–1.6 V output range; ensures tight CPU core voltage tolerance under thermal stress |
| Switching Frequency | 0.08–1.0 MHz per phase; set by FS pin resistor; supports high-frequency designs to reduce passive size |
| Current Sensing | Fully differential, continuous DCR sensing on all 4 channels; enables accurate load-line droop and per-phase current balance |
| Voltage Identification | 8-bit VID interface with selectable Intel VR10/VR11 or AMD 5-/6-bit DAC tables; supports Dynamic VID transitions |
| Remote Sensing | Differential amplifier (VSEN/RGND → VDIFF); compensates PCB IR drop to maintain regulation at CPU die |
| Protection Features | Multi-tier OVP (configurable via OVPSEL), UVP, OCP (avg & per-channel), thermal shutdown (160°C), and open-sense detection |
Pinout & Package
ISL6312CRZ-TR5312 is housed in a 48-lead, 7 mm × 7 mm, 0.5 mm pitch QFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN9289 Rev 6.00 datasheet, Page 2 (top view) and Page 9 (functional descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5 V ±5% supply for internal logic; requires 0.1 µF ceramic decoupling |
| PVCC1_2 / PVCC3 | Gate drive power rails | Independent +5–12 V supplies for channel 1/2 and channel 3 drivers; unconnected PVCC3 configures 2-phase mode |
| VID0–VID7 | DAC reference inputs | 8-bit TTL-compatible inputs decoded per selected VR10/VR11/AMD table; internal pull-up/pull-down current sources |
| VSEN / RGND | Remote sense inputs | Differential pair connected to CPU VDD/VSS sense points; rejects ground noise and trace resistance error |
| ISEN1±–ISEN4± | Channel current sense | Four fully differential inputs for DCR-based inductor current monitoring; used for balancing and OCP |
| UGATE1–3 / LGATE1–3 | Integrated gate drivers | Direct drive outputs for upper/lower MOSFETs of phases 1–3; 4th phase driven externally via PWM4 |
| EN / EN_PH4 | Enable controls | EN enables full controller; EN_PH4 synchronizes external 4th-phase driver POR or disables PWM4 for 3-phase mode |
| OVPSEL / DRSEL | Configuration selects | OVPSEL sets OVP threshold (VDAC+175/250 mV or +350 mV); DRSEL chooses PHASE- or LGATE-detect dead time |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement for immediate response to high di/dt load steps-reducing required output capacitance |
| Adaptive Phase Alignment (APA) | Temporarily aligns all active phase PWM edges during large load transients-improving initial voltage recovery speed |
| Programmable reference offset | OFS pin supports positive/negative DC offset (via resistor to VCC/GND) to fine-tune output voltage without changing VID code |
| Multi-processor DAC compatibility | Single hardware supports Intel VR10, VR11, and AMD modes via VRSEL pin-eliminating BOM variants for mixed-platform designs |
| DCR current sensing architecture | Eliminates current-sense resistors; uses inductor DCR + RC network for lossless, temperature-compensated per-phase current measurement |
Applications
| Server CPU VRM | Desktop CPU Power Delivery |
|---|---|
Use Scenario: High-current, low-voltage regulation for dual-socket Xeon or EPYC processors requiring >100 A with <±10 mV tolerance. IC Role / Device Role / Timing Role: Four-phase PWM controller managing synchronous buck stages with integrated drivers and DCR current sensing. Use Value: APP+APA delivers <100 ns transient response; ±0.5% accuracy maintains CPU stability under dynamic workloads; remote sensing corrects for motherboard IR drop. | Use Scenario: Compact, cost-optimized 3-phase VRM for mainstream Core i5/i7 platforms with thermal constraints. IC Role / Device Role / Timing Role: Configured as 3-phase controller (PVCC3 grounded) driving discrete MOSFETs; uses LGATE-detect dead time for optimal efficiency. Use Value: Integrated drivers reduce component count vs. controller+driver split architecture; VID flexibility supports both Intel and AMD SKUs on same PCB. |
| Laptop CPU Voltage Regulator | Workstation GPU Power Management |
Use Scenario: Space-constrained 2-phase VRM for mobile CPUs where layout area and thermal density are critical. IC Role / Device Role / Timing Role: Operates in 2-phase mode (PVCC3 unconnected); uses differential remote sensing to compensate for flex-cable voltage drop. Use Value: Small 7×7 mm QFN footprint saves board space; ±0.5% accuracy ensures reliable CPU operation across -20°C to +70°C ambient. | Use Scenario: High-reliability 4-phase VRM for professional GPU cards requiring robust OVP/UVP and thermal protection. IC Role / Device Role / Timing Role: Full 4-phase configuration with external ISL6612 driver on PWM4; OVPSEL tied to +5 V for enhanced 350 mV overvoltage margin. Use Value: Multi-tier OVP and open-sense protection prevent GPU damage from sense-line disconnection or feedback failure. |
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 | 6-phase capable; supports Intel VR12.5/IMVP8; no integrated drivers-requires external driver ICs | Targeted at newer CPU generations with higher phase counts and tighter transient specs; lacks onboard gate drivers | Select when upgrading to IMVP8 platforms or requiring >4 phases; expect added BOM cost and layout complexity for drivers |
| TPS53679RSAT | 6-phase controller with integrated drivers; supports VR13/IMVP9; includes PMBus interface and telemetry | Designed for data-center servers with digital power management; adds real-time current/voltage reporting and fault logging | Choose for systems needing PMBus communication, telemetry, or future-proofing beyond VR11; higher cost and larger package (40-pin QFN) |
Compared with IR35201MTRPBF and TPS53679RSAT, the ISL6312CRZ-TR5312 offers lower system cost and smaller footprint for VR10/VR11/AMD applications due to integrated drivers and 48-pin QFN packaging, while trading off digital interface and next-gen protocol support.
Availability
ISL6312CRZ-TR5312 is available at Aetrix Electronics and suitable for server CPU VRMs, desktop motherboard power delivery, laptop voltage regulation, and workstation GPU power management requiring stable component supply and long-term industrial availability.
Supply support for ISL6312CRZ-TR5312 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 is a global semiconductor leader delivering trusted embedded design innovation, formed through the acquisition of Intersil in 2017.
The ISL6312CRZ-TR5312 belongs to Renesas' high-performance analog power management product line, engineered specifically for multi-core microprocessor voltage regulation with emphasis on transient response, accuracy, and platform compatibility across Intel and AMD ecosystems.
FAQ
What is the operating temperature range for the ISL6312CRZ-TR5312?
The ISL6312CRZ-TR5312 is rated for an ambient operating temperature range of 0°C to +70°C, as specified in the ordering information table of the FN9289 datasheet. This commercial-grade rating applies to the CRZ suffix variant; industrial-grade alternatives (e.g., ISL6312IRZ) extend to –40°C to +85°C. Thermal shutdown activates at 160°C junction temperature, with recovery at 100°C.
Does the ISL6312CRZ-TR5312 support 4-phase operation with fully integrated drivers?
The ISL6312CRZ-TR5312 integrates drivers for three phases (UGATE1–3, LGATE1–3) and provides a PWM4 output to control a fourth phase via an external driver IC such as the ISL6612. Full 4-phase operation requires this external driver; the ISL6312CRZ-TR5312 itself does not drive the fourth MOSFET pair directly. PVCC3 must be connected for 4-phase use.
How is remote voltage sensing implemented on the ISL6312CRZ-TR5312?
The ISL6312CRZ-TR5312 implements remote sensing via dedicated VSEN and RGND pins feeding a unity-gain differential amplifier, whose output appears on the VDIFF pin. This architecture measures the voltage difference between the CPU's VDD and VSS sense points, rejecting PCB trace resistance and ground bounce errors. The resulting VDIFF signal is used internally for regulation, ensuring accurate voltage delivery at the load rather than at the VRM output.
Can the ISL6312CRZ-TR5312 be configured for AMD processor support?
Yes, the ISL6312CRZ-TR5312 supports AMD processors via the VRSEL pin, which selects AMD-specific 5-bit or 6-bit DAC tables. VID inputs (VID0–VID7) are compatible with AMD logic thresholds (0.6 V low, 1.0 V high), and the controller provides AMD-mode overvoltage protection thresholds (e.g., VDAC + 250 mV default). This enables single-hardware support for both Intel VR10/VR11 and AMD platforms.
What protection features does the ISL6312CRZ-TR5312 include?
The ISL6312CRZ-TR5312 includes overvoltage protection (OVP) with selectable thresholds (VDAC + 175/250/350 mV), undervoltage protection (UVP) at 55–65% of VID, per-channel and average-channel overcurrent protection (OCP), thermal shutdown at 160°C, and open-circuit detection on VSEN/RGND sense lines. These protections safeguard both the microprocessor and power stage components during fault conditions.
ISL6312CRZ-TR5312 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-TR5312 FAQ
1.How can I place an order for ISL6312CRZ-TR5312 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6312CRZ-TR5312 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-TR5312 reliable?
The price and inventory of ISL6312CRZ-TR5312 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6312CRZ-TR5312 is usually 5 days.
3.What payment methods are accepted for ISL6312CRZ-TR5312?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6312CRZ-TR5312 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6312CRZ-TR5312?
ISL6312CRZ-TR5312 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6312CRZ-TR5312 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-TR5312?
For technical support, including ISL6312CRZ-TR5312 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6312CRZ-TR5312 requirements.
6.How does Aetrix verify that ISL6312CRZ-TR5312 is sourced from the original manufacturer or authorized distributors?
All ISL6312CRZ-TR5312 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-TR5312 meets industry standards.
7.What is the process for return or replacement of ISL6312CRZ-TR5312?
All ISL6312CRZ-TR5312 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6312CRZ-TR5312, 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-TR5312 part is unused and in its original packaging.
Return procedure for ISL6312CRZ-TR5312:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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