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Renesas ISL6313IRZ-T
- Part No.:
- ISL6313IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
ISL6313IRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 36TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,394
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Product details
Overview
ISL6313IRZ-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 in server and desktop CPU VRMs.
For engineers reviewing the ISL6313IRZ-T datasheet, ISL6313IRZ-T pinout, ISL6313IRZ-T application, or ISL6313IRZ-T equivalent, key selection criteria include its -40°C to +85°C industrial temperature rating, integrated dual gate drivers (5V–12V bias), Active Pulse Positioning (APP) modulation for high di/dt transient response, and programmable VID decoding for Intel VR11 and AMD 5-/6-bit DAC tables.
Technical Context
The ISL6313IRZ-T employs a proprietary APP-modulated PWM architecture that enables sub-cycle pulse positioning for rapid initial response to load transients, reducing required bulk capacitance. Its Adaptive Phase Alignment (APA) circuitry forces simultaneous phase activation during large current steps using a user-set trip level via external R-C on the APA pin.
It integrates dual synchronous buck drivers with adaptive non-overlap timing (≤10ns), supports both 2-phase and single-phase operation (via ISEN2- tie), and uses differential remote sensing (VSEN/RGND) with ±0.5% accuracy across 0.375V–1.6V output range. The controller embeds programmable current sense resistors (RSET-based), eliminating external sense resistors while enabling precise channel balancing via continuous DCR sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade CPU VRM deployment in servers and embedded computing platforms. |
| Switching Frequency | Up to 1.5MHz per phase - enables smaller magnetics and faster transient response without sacrificing efficiency. |
| System Accuracy | ±0.5% over temp (1.0–1.6V range) - ensures tight core voltage regulation critical for modern high-performance CPUs. |
| VID Compatibility | Intel VR11 + AMD 5-bit/6-bit DAC tables - single controller supports dual-architecture motherboard designs. |
| Current Sensing | Fully differential, continuous DCR sensing - eliminates discrete sense resistors and enables accurate per-phase current monitoring for balancing. |
| Gate Drive Bias | 5V to 12V (PVCC) - configurable drive strength to optimize FET switching loss vs. EMI in high-current VRMs. |
| OCP Trip Level | 100µA average-channel threshold (typ.) - sets robust overcurrent protection aligned with CPU thermal limits. |
Pinout & Package
ISL6313IRZ-T is housed in a 36-lead 6×6 mm TQFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN6448 Rev 2.00 datasheet, Page 9 (Functional Pin Description) and Page 2 (Top View Pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic; decoupled with 0.1µF ceramic capacitor. |
| PVCC | Power MOSFET driver supply | +5V to +12V adjustable gate drive voltage; decoupled with 1.0µF ceramic capacitor. |
| EN | Enable control input | Threshold-sensitive (~0.85V) enable pin; low disables all regulation and drivers. |
| VID0–VID7 | DAC reference inputs | 8-bit TTL-compatible inputs selecting core voltage; support Intel VR11 and AMD 5-/6-bit tables. |
| VSEN / RGND | Remote voltage sensing pair | Differential sensing of CPU core voltage and local ground to compensate PCB IR drop. |
| ISEN1± / ISEN2± | Channel current sense inputs | Fully differential DCR sensing inputs per phase; enable per-cycle current measurement for balancing. |
| UGATE1/2, LGATE1/2 | MOSFET gate drivers | Integrated high-side and low-side drivers with adaptive non-overlap to prevent shoot-through. |
| BOOT1/2, PHASE1/2 | High-side driver bootstrap interface | Support external bootstrap capacitors; internal diodes charge BOOT from PVCC during low-side conduction. |
| RSET | Internal current sense resistor programming | Single external resistor sets effective RISEN value; eliminates need for external sense resistors. |
| APA | Adaptive Phase Alignment set point | 100µA sink current; external R-C sets trip threshold for synchronized multi-phase turn-on during transients. |
| IOUT | Average channel current monitor | Analog output proportional to total load current; used for telemetry and alternate OCP configuration. |
| OFS | Reference offset programming | External resistor to VCC/GND generates positive/negative DC offset for fine-tuning output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement for <100ns response to high di/dt load steps, reducing output capacitor count by up to 30%. |
| Adaptive Phase Alignment (APA) | Forces simultaneous phase activation during large transients via user-programmable trip level, improving initial droop recovery by >40% vs. interleaved-only operation. |
| Integrated dual MOSFET drivers | Eliminates two external driver ICs and associated layout complexity; supports 5–12V gate bias for optimized FET selection. |
| Differential remote sensing (VSEN/RGND) | Compensates for PCB trace resistance between VRM and CPU socket, maintaining ±0.5% regulation at point-of-load. |
| Programmable VID DAC tables | Hardware-selectable Intel VR11 or AMD 5-/6-bit decoding via SS pin resistor tie, enabling single-BOM motherboard support for dual-platform designs. |
| Dynamic VID compensation (DVC) | External R-C network from DVC to FB smooths voltage transitions during VID code changes, preventing overshoot/undershoot during frequency scaling. |
Applications
| Server CPU Power Delivery | Desktop Platform VRM |
|---|---|
Use Scenario: Dual-socket 2U rack server delivering 120A+ at 1.0–1.3V to dual Intel Xeon Scalable processors under dynamic workload. IC Role / Device Role / Timing Role: Two-phase buck controller managing parallel power stages with DCR current sensing, APP modulation, and APA alignment for sub-100ns transient response. Use Value: Enables stable core voltage under 300A/µs load steps while reducing output bulk capacitance by 35% versus legacy controllers. | Use Scenario: High-end ATX motherboard powering AMD Ryzen 7000-series CPU with Precision Boost Overdrive enabled. IC Role / Device Role / Timing Role: Dual-phase VR11-compliant controller executing VID updates, remote sensing, and load-line programming for adaptive voltage scaling. Use Value: Maintains ±0.5% voltage accuracy across -40°C to +85°C ambient, supporting sustained boost clocks without thermal throttling. |
| Gaming Laptop GPU VRM | Industrial Embedded CPU Module |
Use Scenario: 15W thin-and-light gaming laptop with discrete NVIDIA GPU requiring fast transient response during frame rendering bursts. IC Role / Device Role / Timing Role: Single-phase configured ISL6313IRZ-T (ISEN2- tied to VCC) regulating GPU core voltage with dynamic VID compensation. Use Value: Reduces voltage deviation to <15mV during 10A/µs GPU load steps, preventing frame stutter and shader pipeline stalls. | Use Scenario: Fanless industrial PC module powering Intel Atom x6000E processor in factory automation HMI with extended temperature requirements. IC Role / Device Role / Timing Role: Industrial-temp-rated controller providing robust overvoltage/undervoltage protection and open-sense-line detection for unattended operation. Use Value: Guarantees safe shutdown within 2µs of remote sense line disconnection, preventing CPU latch-up in harsh EMI environments. |
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-T | Three-phase capable, higher max frequency (1.8MHz), adds PMBus interface and telemetry registers. | Targeted at next-gen server VRMs requiring digital monitoring and tighter margining. | Select ISL6322IRZ-T only if three-phase operation or PMBus telemetry is required; ISL6313IRZ-T remains optimal for cost-sensitive dual-phase designs. |
| RT8803AGQW | Two-phase controller with integrated drivers, but lacks APA, APP, and differential remote sensing; uses single-ended sensing. | Suitable for consumer-grade motherboards where transient performance and accuracy are less critical. | Choose RT8803AGQW for budget-oriented designs accepting ±1.2% accuracy and slower transient recovery; ISL6313IRZ-T is preferred for industrial/server reliability. |
Compared with ISL6322IRZ-T and RT8803AGQW, the ISL6313IRZ-T uniquely balances industrial temperature rating, analog precision (±0.5%), and proprietary transient enhancement (APP/APA) without digital interface overhead-making it the optimal choice for analog-focused, high-reliability dual-phase CPU VRMs.
Availability
ISL6313IRZ-T is available at Aetrix Electronics and suitable for server CPU power delivery, desktop platform VRMs, gaming laptop GPU regulation, and industrial embedded CPU modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL6313IRZ-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 technical and manufacturing continuity for the ISL63xx family. Renesas is a global leader in microcontrollers, analog, and power management ICs.
The ISL6313IRZ-T belongs to Renesas' high-performance analog power management product line, specifically engineered for precision voltage regulation in advanced microprocessor power delivery systems including Intel VR11 and AMD CPU platforms.
FAQ
What is the operating temperature range of the ISL6313IRZ-T?
The ISL6313IRZ-T is rated for industrial operation from -40°C to +85°C ambient temperature. This specification is confirmed in the "Recommended Operating Conditions" table on page 6 of FN6448 Rev 2.00. The extended range ensures reliable performance in server VRMs, industrial PCs, and embedded systems where thermal margins are constrained. The ISL6313IRZ-T's thermal shutdown activates at 160°C junction temperature, with recovery at 100°C.
Does the ISL6313IRZ-T support both Intel and AMD microprocessor voltage identification protocols?
Yes, the ISL6313IRZ-T natively supports Intel VR11 mode and AMD 5-bit and 6-bit DAC tables. Selection is hardware-configured via the SS pin: tying RSS to ground enables Intel VR11 decoding, while tying it to VCC selects AMD mode. VID0–VID7 accept TTL-level inputs, and internal pull-ups/pull-downs auto-adapt to each protocol. This dual compatibility is documented in the "Features" section and "Functional Pin Description" on page 9 of FN6448 Rev 2.00.
How does the ISL6313IRZ-T achieve channel current balancing without external sense resistors?
The ISL6313IRZ-T achieves per-phase current balancing using fully differential, continuous DCR current sensing with integrated programmable current sense resistors. A single external resistor on the RSET pin configures the internal RISEN value, eliminating discrete sense resistors. Each channel's ISEN1±/ISEN2± inputs measure inductor DCR voltage drop, and the controller continuously compares sensed currents to the cycle-average IAVG to adjust PWM duty cycles in real time-ensuring balanced loading across phases.
What is the purpose of the APA pin on the ISL6313IRZ-T, and how is it configured?
The APA (Adaptive Phase Alignment) pin on the ISL6313IRZ-T sets the trip threshold for synchronized multi-phase activation during large load transients. A 100µA current flows into the APA pin; connecting an external resistor (e.g., 5kΩ) from APA to COMP creates a DC offset (e.g., 500mV) that triggers simultaneous phase turn-on when the COMP voltage exceeds the filtered APA voltage. This configuration is detailed in Figure 3 and Equation 3 on page 11 of FN6448 Rev 2.00. The ISL6313IRZ-T requires this external R-C network to activate APA functionality.
Can the ISL6313IRZ-T be used in single-phase configurations?
Yes, the ISL6313IRZ-T supports single-phase operation by tying the ISEN2- pin to VCC. This action disables Channel 2, leaving only Channel 1 active. All Channel 2 pins-including PHASE2, UGATE2, LGATE2, BOOT2, and ISEN2+-must remain unconnected in this configuration. The controller retains full functionality (VID decoding, remote sensing, OCP, soft-start) for the active phase. This capability is explicitly stated in the "Number of Active Channels" section on page 12 of FN6448 Rev 2.00.
ISL6313IRZ-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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-TQFN (6x6)
ISL6313IRZ-T FAQ
1.How can I place an order for ISL6313IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6313IRZ-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 ISL6313IRZ-T reliable?
The price and inventory of ISL6313IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6313IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6313IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6313IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6313IRZ-T?
ISL6313IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6313IRZ-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 ISL6313IRZ-T?
For technical support, including ISL6313IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6313IRZ-T requirements.
6.How does Aetrix verify that ISL6313IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6313IRZ-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 ISL6313IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6313IRZ-T?
All ISL6313IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6313IRZ-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 ISL6313IRZ-T part is unused and in its original packaging.
Return procedure for ISL6313IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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