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Renesas ISL6313IRZ
- Part No.:
- ISL6313IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
ISL6313IRZ.pdf
- Description:
- IC REG CTRLR VR11 1OUT 36TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,597
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Product details
Overview
ISL6313IRZ from Renesas Electronics (formerly Intersil) is a two-phase buck PWM controller with integrated MOSFET drivers, designed for precision core voltage regulation of Intel VR11 and AMD microprocessors. 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 power delivery.
For engineers reviewing the ISL6313IRZ datasheet, ISL6313IRZ pinout, ISL6313IRZ application, or ISL6313IRZ equivalent, key selection considerations include its -40°C to +85°C industrial temperature rating, integrated 36-pin TQFN package with dual gate drivers, VID DAC table selectability (Intel VR11/AMD 5-bit/6-bit), Active Pulse Positioning (APP) modulation for high di/dt transient response, and dynamic VID compensation capability.
Technical Context
The ISL6313IRZ implements a proprietary APP-modulated PWM architecture where each phase's pulse position is dynamically adjusted within the switching cycle to minimize output voltage droop during rapid load steps. Its error amplifier drives a modulator ramp comparator with real-time current correction derived from continuous DCR sensing on both phases.
Adaptive Phase Alignment (APA) activates when COMP voltage excursion exceeds a user-set threshold via APA pin resistor, forcing simultaneous turn-on of both UGATEs to deliver peak current faster than interleaved operation alone. The controller supports single- or two-phase operation via ISEN2– tie-high configuration and uses internal programmable current sense resistors-no external RSENSE required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | -40°C to +85°C - qualified for industrial-grade CPU VRM applications requiring extended thermal margin. |
| Switching Frequency | Up to 1.5MHz per phase - enables smaller magnetics and reduced output capacitance in space-constrained designs. |
| System Accuracy | ±0.5% (1.0–1.6V range) - ensures tight core voltage regulation across temperature and load for modern CPUs. |
| Current Sensing | Fully differential DCR sensing with integrated programmable resistors - eliminates external sense resistors and improves noise immunity. |
| VID Compatibility | Intel VR11, AMD 5-bit & 6-bit DAC tables - single part supports multiple processor families without hardware change. |
| Gate Drive Bias | 5V to 12V PVCC - configurable drive strength to optimize FET switching loss vs. EMI in final layout. |
| Oscillator Accuracy | 215–280kHz (typ 250kHz) with 100kΩ RT - stable frequency setting for predictable loop bandwidth and ripple performance. |
Pinout & Package
ISL6313IRZ 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 2 (top view) and Page 9 (functional description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% small-signal rail; decoupled with 0.1µF ceramic for logic stability. |
| PVCC | Power gate driver supply | +5V to +12V adjustable drive voltage; decoupled with 1.0µF ceramic for robust MOSFET switching. |
| EN | Enable control input | 0.85V threshold enable; asserts soft-start and full regulation when pulled high. |
| VID0–VID7 | DAC reference inputs | 8-bit TTL-compatible inputs selecting core voltage setpoint per Intel/AMD VID tables. |
| VSEN / RGND | Remote voltage sensing pair | Differential sensing at CPU VCORE and local ground - compensates PCB IR drop for accurate regulation. |
| ISEN1± / ISEN2± | Phase current sense inputs | Fully differential DCR sensing nodes for continuous per-phase current measurement and balance. |
| UGATE1/2, LGATE1/2 | MOSFET gate drivers | Integrated high- and low-side drivers eliminate need for external driver ICs or discrete buffers. |
| BOOT1/2, PHASE1/2 | High-side bootstrap interface | Supports standard bootstrap topology with internal diode; requires external 0.1µF ceramic bootstrap caps. |
| RSET | Current sense calibration | Single external resistor sets effective internal RISEN value - no external shunts needed. |
| APA | Adaptive Phase Alignment control | 100µA sink; RAPA to COMP sets trip threshold for synchronized multi-phase turn-on during transients. |
| DVC | Dynamic VID compensation | RC network to FB smooths VID transition edges - prevents overshoot/undershoot during voltage changes. |
| PGOOD | Power-good status output | Open-drain signal indicating valid VCORE within OV/UV windows post-soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement to reduce initial transient droop by >30% vs. fixed-frequency PWM. |
| Adaptive Phase Alignment (APA) | Forces simultaneous phase activation during large di/dt events - cuts peak droop time by up to 50%. |
| Integrated MOSFET Drivers | Eliminates 4 external driver ICs or 8 discrete buffers - reduces BOM count and layout area by ~25%. |
| Differential Remote Sensing | Compensates for up to 50mV ground potential difference between VRM and CPU - maintains regulation accuracy. |
| Programmable Reference Offset | OFS pin supports ±100mV DC offset via single resistor - enables precise load-line tuning for VR11 compliance. |
Applications
| Server CPU Power Delivery | Desktop Platform VRM |
|---|---|
Use Scenario: Dual-socket 2U rack server with dual Intel Xeon Scalable processors requiring tightly regulated 0.8–1.35V core rails at up to 200A total. IC Role / Device Role / Timing Role: Two-phase PWM controller managing synchronous buck stages with DCR current sensing and APP-modulated timing for <500ns transient response. Use Value: Enables 30% fewer bulk capacitors vs. legacy controllers while meeting Intel VR11 spec for load-step recovery under 10A/µs di/dt. | Use Scenario: High-end ATX motherboard supporting AMD Ryzen 7000 series CPUs with dynamic VID scaling across P-states. IC Role / Device Role / Timing Role: Dual-phase VR controller decoding AMD 6-bit VID codes, implementing APA for rapid P-state transitions, and using DVC pin for clean VID slewing. Use Value: Achieves <±3mV regulation error across 0–100°C ambient and supports seamless C-state entry/exit without voltage glitch. |
| Gaming Laptop CPU Regulator | Workstation GPU Core Supply |
Use Scenario: 17-inch gaming laptop with Intel Core i9-HX processor demanding high-efficiency, thermally constrained core voltage regulation. IC Role / Device Role / Timing Role: Single-phase configured ISL6313IRZ (via ISEN2– tied to VCC) delivering 1.0–1.25V at up to 120A with thermal shutdown at 160°C. Use Value: Leverages integrated drivers and APP modulation to sustain >92% efficiency at 60A while reducing VRM footprint by 40% vs. discrete controller+driver solution. | Use Scenario: PCIe-based workstation graphics card with NVIDIA Ada Lovelace GPU requiring fast transient response on 0.7–1.05V core rail. IC Role / Device Role / Timing Role: Two-phase controller operating at 1.2MHz with APA and differential sensing to handle 50A/µs GPU load spikes. Use Value: Reduces peak voltage deviation to <12mV during 80A load steps - critical for GPU stability during ray-tracing workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-phase CPU VRM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | Three-phase capable; higher max frequency (1.8MHz); added PMBus interface; same TQFN-36 package. | Required for >150A CPU loads or systems needing digital telemetry and fault logging. | Select ISL6322IRZ when three-phase operation or PMBus monitoring is mandatory; otherwise ISL6313IRZ offers lower cost and simpler analog design. |
| RT8803AGQW | Two-phase controller with integrated drivers; supports Intel VR12.5/VR13; 0.5–2.0MHz frequency range; QFN-40 package. | Targeted at newer Intel platforms requiring VR12.5 compliance and higher current density. | Choose RT8803AGQW only for VR12.5/VR13 designs; ISL6313IRZ remains optimal for VR11 and AMD platforms with proven layout compatibility. |
Compared with ISL6322IRZ and RT8803AGQW, the ISL6313IRZ provides best-in-class transient response for VR11/AMD systems at minimal BOM cost, with no digital interface overhead or package rework - making it ideal for cost-sensitive, high-volume desktop and server VRMs.
Availability
ISL6313IRZ is available at Aetrix Electronics and suitable for server CPU power delivery, desktop platform VRMs, gaming laptop regulators, and workstation GPU core supplies requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for ISL6313IRZ 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 support for its high-performance analog and power management portfolio.
The ISL6313IRZ belongs to Renesas' CPU voltage regulator controller product line, engineered specifically for multi-phase core power delivery in x86 and AMD64 computing platforms with emphasis on transient response, VID compatibility, and integration density.
FAQ
What is the maximum supported switching frequency for the ISL6313IRZ?
The ISL6313IRZ supports an adjustable switching frequency up to 1.5MHz per phase, set by an external resistor on the FS pin. At typical 100kΩ setting, the oscillator operates at 250kHz (min 215kHz, max 280kHz), but frequency can be scaled linearly across 0.08–1.0MHz range per datasheet Equation 47. This high-frequency capability allows use of smaller inductors and reduced output capacitance in compact VRM designs.
Does the ISL6313IRZ require external current sense resistors?
No, the ISL6313IRZ does not require external current sense resistors. It integrates programmable current sense resistors calibrated via the RSET pin - a single external resistor (e.g., 40.2kΩ) sets the effective RISEN value for both phases. This eliminates board space, cost, and thermal drift errors associated with discrete shunts while maintaining ±2.5µA offset accuracy per channel.
How does the ISL6313IRZ support both Intel and AMD processors?
The ISL6313IRZ supports both Intel VR11 and AMD microprocessors through selectable VID DAC tables. The SS pin determines mode: tied to GND selects Intel VR11 (8-bit), tied to VCC selects AMD (5-bit or 6-bit). VID0–VID7 accept TTL-level inputs, and internal pull-up/pull-down currents auto-adapt to each standard. This eliminates firmware or hardware changes when designing for dual-platform motherboards.
What is the purpose of the APA pin on the ISL6313IRZ?
The APA pin on the ISL6313IRZ enables Adaptive Phase Alignment - a proprietary feature that forces simultaneous turn-on of both phases during large load transients. A 100µA current flows into APA; connecting a resistor (e.g., 5kΩ) to COMP sets a 500mV trip threshold. When COMP voltage exceeds the filtered APA voltage, all channels activate together, cutting peak droop time by up to 50% compared to interleaved-only operation.
Can the ISL6313IRZ operate in single-phase mode?
Yes, the ISL6313IRZ can operate in single-phase mode. Tie the ISEN2– pin to VCC to disable Channel 2; all other Channel 2 pins (PHASE2, UGATE2, LGATE2, BOOT2, ISEN2+) must remain unconnected. The controller then regulates using only Channel 1 with full functionality - including APP, DCR sensing, and VID decoding - making it suitable for mid-range CPUs with lower current demands.
What thermal protection features does the ISL6313IRZ include?
The ISL6313IRZ includes overtemperature shutdown with a 160°C setpoint and 100°C hysteresis for thermal recovery. This protection is independent of external circuitry and triggers a complete shutdown of gate drivers and PWM logic. The TQFN-36 package has θJA = 32°C/W and θJC = 2.0°C/W, enabling reliable operation up to +85°C ambient when mounted on a 2-oz copper PCB with thermal vias to inner layers. No external thermal sensor is required.
ISL6313IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 36-WFQFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL6313IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6313IRZ 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 reliable?
The price and inventory of ISL6313IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6313IRZ is usually 5 days.
3.What payment methods are accepted for ISL6313IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6313IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6313IRZ?
ISL6313IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6313IRZ 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?
For technical support, including ISL6313IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6313IRZ requirements.
6.How does Aetrix verify that ISL6313IRZ is sourced from the original manufacturer or authorized distributors?
All ISL6313IRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL6313IRZ?
All ISL6313IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6313IRZ, 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 part is unused and in its original packaging.
Return procedure for ISL6313IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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