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Renesas ISL6313CRZ-T
- Part No.:
- ISL6313CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
ISL6313CRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 36TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,093
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Product details
Overview
ISL6313CRZ-T from Renesas (formerly Intersil) is a two-phase buck PWM controller with integrated MOSFET drivers, designed for precision core voltage regulation in Intel VR11 and AMD microprocessor power delivery systems. It delivers ±0.5% system accuracy over temperature, supports up to 1.5MHz per-phase switching, and implements fully differential DCR current sensing for load line programming and channel current balancing - enabling high-efficiency, low-ripple CPU core supplies in server and desktop motherboards.
For engineers reviewing the ISL6313CRZ-T datasheet, ISL6313CRZ-T pinout, ISL6313CRZ-T application, or ISL6313CRZ-T equivalent, key selection considerations include its dual-phase operation with internal 5V–12V gate drive bias, programmable VID decoding (Intel VR11 / AMD 5-/6-bit), Active Pulse Positioning (APP) modulation for fast transient response, and integrated protection including multi-tiered overvoltage, undervoltage, and overcurrent detection.
Technical Context
The ISL6313CRZ-T employs a proprietary Active Pulse Positioning (APP) modulator that enables sub-cycle PWM pulse positioning for rapid response to high di/dt load transients, reducing required bulk capacitance. Its Adaptive Phase Alignment (APA) circuitry forces simultaneous channel activation during large current steps using a user-set trip level via external RAPA on the APA pin.
It integrates fully differential, continuous DCR current sensing across two phases with programmable internal sense resistors (set via RRSET), eliminating external sense resistors. The controller supports selectable DAC tables (Intel VR11 or AMD 5-/6-bit) via SS pin logic and provides differential remote voltage sensing (VSEN/RGND) with ±0.5% accuracy over temperature for precise core voltage regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Two-phase synchronous buck PWM controller with integrated high- and low-side MOSFET drivers |
| Operating Temp Range | 0°C to +70°C - validated for commercial motherboard environments |
| Switching Frequency | Adjustable up to 1.5MHz per phase - enables compact magnetics and reduced output ripple |
| System Accuracy | ±0.5% over temperature (1.000V–1.600V range) - ensures tight CPU VDD tolerance compliance |
| VID Support | Intel VR11, AMD 5-bit & 6-bit DAC tables - single IC supports dual-architecture platforms |
| Current Sensing | Fully differential DCR sensing with integrated programmable resistors - no external sense resistors required |
| Protection Features | Multi-tier OVP/UVP/OCP, open-sense-line prevention, thermal shutdown at 160°C - safeguards CPU and power stage |
Pinout & Package
ISL6313CRZ-T is housed in a 36-lead, 6mm × 6mm, 0.5mm pitch TQFN package with exposed thermal pad (PKG DWG # L36.6x6). This RoHS-compliant, Pb-free package supports high-power density layouts and efficient heat dissipation in space-constrained VRM designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic and error amplifier - requires 0.1µF ceramic decoupling |
| PVCC | Power driver supply | +5V to +12V gate drive bias - sets UGATE/LGATE drive strength and slew rates |
| EN | Enable control | Threshold-sensitive (~0.85V) enable pin - disables all channels when pulled low |
| VID0–VID7 | DAC reference inputs | 8-bit digital interface for microprocessor voltage identification - supports Intel VR11 and AMD modes |
| VSEN / RGND | Remote sensing pair | Differential sensing of CPU core voltage and local ground - compensates for PCB IR drop |
| ISEN1± / ISEN2± | Channel current sense | Fully differential inputs for DCR-based inductor current measurement per phase |
| UGATE1/2, LGATE1/2 | MOSFET gate drivers | Integrated high- and low-side drivers with adaptive non-overlap timing - eliminates external driver ICs |
| PHASE1/2 | High-side source return | Connection point for upper MOSFET sources - used for shoot-through protection monitoring |
| BOOT1/2 | High-side floating bias | Bootstrap node for upper gate drive - internal diode charges external bootstrap capacitor from PVCC |
| IOUT | Average current monitor | Analog output proportional to total load current - used for telemetry and alternate OCP threshold setting |
| APA | Adaptive Phase Alignment set | 100µA sink pin - external resistor to COMP sets trip threshold for synchronized phase-on during transients |
| OFS | Reference offset control | Programmable ± offset generator - external resistor to GND/VCC adds fixed DC offset to FB loop |
| SS | Soft-start & mode select | Resistor-to-ground selects Intel VR11 mode; resistor-to-VCC selects AMD mode - also sets soft-start ramp slope |
| PGOOD | Power-good indicator | Open-drain output signaling valid VSEN within OVP/UVP window after soft-start completion |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) Modulation | Enables sub-cycle PWM edge placement for <100ns response to load transients - reduces required bulk capacitance by up to 30% |
| Adaptive Phase Alignment (APA) | User-programmable trip level (via RAPA) triggers simultaneous two-phase conduction during high di/dt events - improves initial transient recovery by >40% |
| Fully Differential DCR Current Sensing | Eliminates need for external sense resistors and associated layout sensitivity - achieves <±2.5µA offset error and 80µA/mV gain accuracy |
| Integrated Gate Drivers | Drives both high- and low-side MOSFETs with 1.25Ω upper source / 0.80Ω lower sink resistance - supports 12V PVCC for fast 12ns LGATE fall time |
| Dynamic VID Compensation (DVC) | External RC network from DVC to FB smooths dynamic VID transitions - prevents overshoot during voltage scaling events |
| Multi-Processor VID Compatibility | Single hardware design supports Intel VR11 and AMD 5-/6-bit DAC tables - simplifies platform reuse across CPU families |
Applications
| Server CPU Power Delivery | Desktop Motherboard VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon or EPYC processors under dynamic workloads including AI inference and virtualization. IC Role / Device Role / Timing Role: Two-phase PWM controller managing parallel power stages with DCR current sensing and APA-triggered transient response. Use Value: Enables stable 1.0V–1.3V output at up to 200A with <±5mV droop and <50µs recovery from 50A/µs load steps - meeting Intel VR11 spec requirements. | Use Scenario: High-density ATX motherboard delivering scalable core power to Ryzen or Core i9 CPUs with BIOS-controlled voltage scaling. IC Role / Device Role / Timing Role: Dual-phase buck controller implementing VR11/AMD VID decoding, remote sensing, and APP-modulated PWM for rapid P-state transitions. Use Value: Supports seamless transition between 0.8V idle and 1.4V turbo states with <1% voltage deviation - critical for overclocking stability and thermal management. |
| Gaming Laptop CPU Regulation | Workstation GPU Core Supply |
Use Scenario: Compact VRM solution for thin-and-light gaming laptops requiring high efficiency and low acoustic noise under burst loads. IC Role / Device Role / Timing Role: Two-phase controller with integrated drivers and programmable soft-start - minimizing BOM count and PCB area. Use Value: Reduces component count by 7+ parts vs discrete controller+driver solutions while maintaining <±0.5% regulation accuracy across -20°C to +70°C ambient. | Use Scenario: Precision core supply for professional GPU modules (e.g., NVIDIA RTX A-series) where voltage stability directly impacts compute reliability. IC Role / Device Role / Timing Role: Dual-phase controller with differential remote sensing and load-line programming - compensating for GPU package IR drop and thermal drift. Use Value: Achieves ±0.5% system accuracy over temperature and load - preventing GPU throttling or artifacting during sustained FP64 workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports up to 4 phases; includes digital PMBus interface and telemetry; higher pin count (48-QFN); requires external drivers | Targeted at digitally managed server VRMs with firmware-based configuration and fault logging | Choose IR35201 when digital control, phase extension, or telemetry integration is required - not a pin-compatible replacement |
| TPS53679RSLR | TI's dual-phase controller with COT control; supports up to 1.2MHz; integrated drivers; different VID table mapping and APA implementation | Optimized for cost-sensitive client platforms with simplified compensation and auto-phase shedding | Choose TPS53679 for new designs prioritizing ease of design-in and TI ecosystem support - requires layout and loop compensation revalidation |
Compared with IR35201MTRPBF and TPS53679RSLR, the ISL6313CRZ-T offers analog APP/APA transient enhancement without digital overhead, making it ideal for high-performance analog VRMs where deterministic sub-microsecond response and minimal firmware dependency are critical.
Availability
ISL6313CRZ-T is available at Aetrix Electronics and suitable for server motherboard design, desktop VRM development, and embedded computing platforms requiring stable component supply and long-term industrial availability.
Supply support for ISL6313CRZ-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 (formerly Intersil) is a global semiconductor leader specializing in analog, power, and embedded processing solutions for industrial, automotive, and computing markets.
The ISL6313CRZ-T belongs to Renesas' high-performance CPU power controller product line, engineered specifically for multi-phase VRM applications demanding precision voltage regulation, fast transient response, and multi-architecture compatibility in datacenter and client platforms.
FAQ
What is the operating temperature range for the ISL6313CRZ-T?
The ISL6313CRZ-T is rated for operation from 0°C to +70°C ambient temperature, as specified in the FN6448 datasheet. This commercial-grade temperature range aligns with standard motherboard environments and is validated for reliable performance in desktop and entry-level server applications. The device includes thermal shutdown at 160°C junction temperature and recovers at 100°C, providing robust thermal protection during overload conditions. Always ensure adequate PCB copper pour and airflow per the thermal resistance specs (θJA = 32°C/W).
Does the ISL6313CRZ-T support both Intel and AMD microprocessors?
Yes, the ISL6313CRZ-T natively supports both Intel VR11 and AMD microprocessor voltage identification protocols. It includes programmable VID decoding for Intel VR11 (8-bit), AMD 5-bit, and AMD 6-bit DAC tables - selected via the SS pin logic. This dual-architecture capability allows a single ISL6313CRZ-T design to serve multiple CPU platforms without hardware changes, reducing validation effort and BOM complexity in multi-platform motherboard development.
How does the ISL6313CRZ-T implement current sensing without external resistors?
The ISL6313CRZ-T uses fully differential, continuous DCR current sensing with integrated programmable current sense resistors. A single external resistor connected from the RSET pin to VCC sets the effective value of the internal RISEN elements, eliminating the need for discrete sense resistors. This architecture achieves <±2.5µA offset error and 80µA/mV gain accuracy while rejecting common-mode noise and PCB layout parasitics - critical for stable current balance across two phases in high-current CPU supplies.
What is the purpose of the APA pin on the ISL6313CRZ-T?
The APA (Adaptive Phase Alignment) pin on the ISL6313CRZ-T is a 100µA current sink used to set the trip threshold for synchronized two-phase conduction during large load transients. By connecting an external resistor (e.g., 5kΩ for 500mV) between APA and COMP, designers define the voltage excursion required to trigger APA - forcing both PHASE1 and PHASE2 to turn on simultaneously for faster initial response. This feature is unique to the ISL6313CRZ-T and significantly improves recovery time from high di/dt steps without increasing steady-state losses.
Can the ISL6313CRZ-T operate in single-phase mode?
Yes, the ISL6313CRZ-T can be configured for single-phase operation by tying the ISEN2- pin to VCC. This action disables Channel 2, leaving only Channel 1 active. In this mode, pins PHASE2, LGATE2, UGATE2, BOOT2, and ISEN2+ must remain unconnected. The controller retains full functionality - including APP modulation, remote sensing, and VID decoding - but delivers all output current through one phase. This flexibility allows designers to reuse the same IC across both single- and dual-phase designs, simplifying inventory and qualification.
ISL6313CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 36-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR11, AMD CPU
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 1.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-TQFN (6x6)
ISL6313CRZ-T FAQ
1.How can I place an order for ISL6313CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6313CRZ-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 ISL6313CRZ-T reliable?
The price and inventory of ISL6313CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6313CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6313CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6313CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6313CRZ-T?
ISL6313CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6313CRZ-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 ISL6313CRZ-T?
For technical support, including ISL6313CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6313CRZ-T requirements.
6.How does Aetrix verify that ISL6313CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6313CRZ-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 ISL6313CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6313CRZ-T?
All ISL6313CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6313CRZ-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 ISL6313CRZ-T part is unused and in its original packaging.
Return procedure for ISL6313CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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