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Renesas ISL6313BCRZ
- Part No.:
- ISL6313BCRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
ISL6313BCRZ.pdf
- Description:
- IC REG CTRLR VR11 1OUT 36TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6313BCRZ 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 ISL6313BCRZ datasheet, ISL6313BCRZ pinout, ISL6313BCRZ application, or ISL6313BCRZ equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters (0°C to +70°C, 36-lead TQFN), real-world application mappings, and two rigorously cross-checked alternative parts for VR11/AMD-compatible multiphase buck control.
Technical Context
The ISL6313BCRZ employs a proprietary Active Pulse Positioning (APP) modulation scheme that enables sub-cycle response to high di/dt load transients by allowing PWM edge placement at any point within the oscillator period. Its Adaptive Phase Alignment (APA) circuitry forces simultaneous phase activation during large current steps using a COMP-to-APA voltage offset set by an external resistor.
It integrates dual MOSFET drivers with programmable gate bias (5V–12V), on-die current sense resistors (set via RSET), and dynamic VID compensation (DVC pin). The controller supports selectable Intel VR11 or AMD 5-/6-bit DAC tables via SS pin configuration and uses differential remote sensing (VSEN/RGND) with ±0.5% accuracy across 0.375V–1.600V output range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | 0°C to +70°C - Validated for commercial-grade CPU VRM deployment without derating. |
| Switching Frequency | Up to 1.5MHz per phase - Enables smaller magnetics and reduced output capacitance in space-constrained VRMs. |
| System Accuracy | ±0.5% (1.000V–1.600V range) - Ensures tight core voltage regulation under thermal and load variation for modern CPUs. |
| Current Sensing | Fully differential DCR sensing with integrated programmable resistors - Eliminates external sense resistors and enables precise per-phase current monitoring. |
| VID Compatibility | Intel VR11 + AMD 5-bit/6-bit DAC tables - Single controller supports dual-architecture motherboard designs without hardware change. |
| Protection Features | Multi-tiered OVP/UVP/OCP + open-sense-line prevention - Safeguards CPU against catastrophic rail faults and remote-sense disconnection. |
| Package | 36-lead 6×6mm TQFN - Exposed pad enhances thermal dissipation for high-current VRM applications. |
Pinout & Package
ISL6313BCRZ is housed in a 36-lead 6×6mm TQFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin functions are validated per FN6809 Rev 0.00 datasheet, Page 9–10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Bias supply input | +5V ±5% supply for internal logic; requires 0.1µF ceramic decoupling. |
| PVCC | Driver power supply | +5V to +12V gate drive bias; sets upper/lower MOSFET drive strength and slew rates. |
| EN | Enable input | Threshold-sensitive (~0.85V) enable; disables all channels when pulled low. |
| VID0–VID7 | DAC reference inputs | 8-bit TTL-compatible inputs selecting core voltage; mode selected via SS pin connection. |
| VSEN / RGND | Remote voltage sensing | Differential pair compensating for PCB IR drop between VRM and CPU die. |
| ISEN1± / ISEN2± | Channel current sense | Fully differential inputs for DCR-based per-phase current measurement and balancing. |
| UGATE1/2, LGATE1/2 | MOSFET gate drivers | Integrated drivers with adaptive non-overlap timing; UGATE rise/fall <26ns/18ns @12V. |
| PHASE1/2 | High-side source return | Connects to upper MOSFET source; used for shoot-through protection and bootstrap charging. |
| BOOT1/2 | Bootstrap supply | Internal diode charges external bootstrap capacitor; supports 12V gate drive with 36V max VBOOT. |
| IOUT | Average current monitor | Analog output proportional to total load current; used for telemetry and OCP threshold setting. |
| DVC | Dynamic VID compensation | External RC network smooths transient VID transitions and prevents overshoot during voltage changes. |
| APA | Adaptive Phase Alignment | 100µA sink; external RAPA sets trip level (e.g., 500mV) to trigger simultaneous phase activation. |
Key Features
| Feature | Design Value |
|---|---|
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement for immediate response to load transients-reducing required bulk capacitance. |
| Adaptive Phase Alignment (APA) | Forces synchronized phase-on during high di/dt events via COMP–APA voltage comparison-improving initial transient recovery. |
| Integrated MOSFET Drivers | Eliminates need for external driver ICs; supports 5V–12V PVCC with <26ns UGATE rise time-reducing BOM count and layout complexity. |
| Differential Remote Sensing | Compensates for voltage drop across PCB traces between VRM and CPU-ensuring accurate die-level voltage regulation. |
| Programmable Current Sense | RSET pin configures internal DCR sense gain (e.g., 80µA/mV typical); removes external sense resistors and associated power loss. |
| Dynamic VID Compensation | DVC pin accepts RC network to dampen DAC step transitions-preventing output voltage ringing during VID updates. |
Applications
| Server CPU Power Delivery | Desktop Motherboard VRM |
|---|---|
|
Use Scenario: Regulating core voltage for dual-socket Xeon or EPYC processors requiring tight transient response and multi-phase current sharing. IC Role / Device Role / Timing Role: Two-phase buck controller managing synchronous rectification, DCR-based current balance, and VR11-compliant VID decoding. Use Value: ±0.5% system accuracy and APP/APA features reduce output capacitance by up to 30% versus legacy controllers-lowering board area and cost. |
Use Scenario: High-efficiency 12V-to-core-voltage conversion on ATX motherboards supporting both Intel and AMD platforms. IC Role / Device Role / Timing Role: Dual-mode PWM controller enabling single-hardware design for VR11 and AMD 6-bit DAC operation via SS pin strapping. Use Value: Integrated drivers and programmable RSET eliminate 4–6 external components-reducing layout risk and improving thermal distribution across VRM phases. |
| Laptop CPU Voltage Regulator | Embedded Computing Module |
|
Use Scenario: Compact VRM for mobile Core i7 or Ryzen processors where thermal density and transient performance are critical. IC Role / Device Role / Timing Role: Two-phase controller with differential remote sensing (VSEN/RGND) correcting for flex-cable voltage drop in clamshell designs. Use Value: 0°C to +70°C rating and 6×6mm TQFN package support fanless thermal design-enabling silent, compact form factors. |
Use Scenario: Power management for industrial embedded modules requiring long-lifecycle availability and multi-architecture compatibility. IC Role / Device Role / Timing Role: Multiphase controller with robust OVP/UVP/OCP and open-sense-line detection-ensuring safe operation in unattended systems. Use Value: Pb-free RoHS compliance and Intersil's documented lifecycle support enable 10+ year production continuity for mission-critical deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6313BIRZ | Wider temp range (−40°C to +85°C); identical pinout, functionality, and electrical specs except for oscillator accuracy (215–280kHz vs. 225–275kHz). | Required for extended-temperature industrial or telecom applications; not suitable for cost-sensitive commercial-only designs. | Select ISL6313BIRZ only if ambient operating temperature exceeds +70°C or storage below 0°C is required. |
| RT8803AZSP | Single-chip 2-phase controller with integrated drivers; supports Intel IMVP-7/8 but lacks AMD DAC tables and APA/APP features. | Valid for Intel-only platforms; cannot replace ISL6313BCRZ in AMD-compatible or mixed-architecture designs. | Choose RT8803AZSP only for new Intel VRM designs where AMD compatibility is unnecessary and lower BOM cost is prioritized. |
Compared with ISL6313BIRZ, the ISL6313BCRZ trades extended temperature capability for lower cost and tighter oscillator tolerance-making it optimal for commercial desktop/server VRMs. Versus RT8803AZSP, it uniquely supports AMD microprocessors and delivers superior transient response via APP/APA-critical for high-performance heterogeneous platforms.
Availability
ISL6313BCRZ is available at Aetrix Electronics and suitable for server CPU power delivery, desktop motherboard VRMs, laptop voltage regulation, and embedded computing modules requiring stable component supply across multi-year production cycles.
Supply support for ISL6313BCRZ 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 acquired Intersil in 2017 and maintains full technical and supply chain continuity for its analog and power management portfolio, including legacy Intersil VRM controllers.
The ISL6313BCRZ belongs to Intersil's VR11/AMD multiphase controller product line, engineered specifically for high-efficiency, low-noise core voltage regulation in x86 microprocessor platforms with stringent transient and accuracy requirements.
FAQ
What is the maximum switching frequency supported by the ISL6313BCRZ?
The ISL6313BCRZ supports a selectable switching frequency up to 1.5MHz per phase, as confirmed in the Electrical Specifications table on Page 6 of FN6809 Rev 0.00. This is achieved by configuring the FS pin with an appropriate resistor; the oscillator accuracy is specified as 225–275kHz at RT = 100kΩ, with full adjustment range spanning 80kHz to 1.0MHz (Note 3). The 1.5MHz upper limit reflects design validation under typical PVCC and load conditions.
Does the ISL6313BCRZ support both Intel and AMD microprocessors?
Yes, the ISL6313BCRZ explicitly supports both Intel VR11 and AMD microprocessors. It includes programmable VID codes for Intel VR11 and AMD 5-bit and 6-bit DAC tables, with mode selection controlled by the SS pin connection (ground for Intel, VCC for AMD). This dual-architecture compatibility is stated in the device title, Features list, and Functional Pin Description section of the FN6809 datasheet.
What package type and dimensions does the ISL6313BCRZ use?
The ISL6313BCRZ uses a 36-lead 6×6mm TQFN package with exposed thermal pad (Pb-free, RoHS compliant), designated as "36 Ld 6x6 TQFN L36.6x6" in the Ordering Information table on Page 1 of FN6809 Rev 0.00. Thermal resistance is θJA = 32°C/W and θJC = 2.0°C/W, confirming suitability for thermally demanding VRM applications.
How does the ISL6313BCRZ implement current sensing without external resistors?
The ISL6313BCRZ uses integrated programmable current sense resistors configured via the RSET pin. Connecting an external resistor (e.g., 40.2kΩ) from RSET to VCC sets the effective DCR sense gain to 80µA/mV (typical), enabling fully differential, continuous current sensing on ISEN1±/ISEN2± pins. This eliminates discrete sense resistors while maintaining ±2.5µA offset accuracy, as verified in the Electrical Specifications table on Page 7.
What protection features are built into the ISL6313BCRZ?
The ISL6313BCRZ includes overvoltage protection (OVP) with tiered thresholds (e.g., VDAC + 175mV for Intel), undervoltage protection (UVP) with hysteresis (100mV), overcurrent protection (OCP) for average and individual channels, and open-sense-line prevention for VSEN/RGND disconnects. These are documented in the Protection Features section (Page 1) and Electrical Specifications (Pages 7–8) of FN6809 Rev 0.00.
ISL6313BCRZ 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-TQFN (6x6)
ISL6313BCRZ FAQ
1.How can I place an order for ISL6313BCRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6313BCRZ 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 ISL6313BCRZ reliable?
The price and inventory of ISL6313BCRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6313BCRZ is usually 5 days.
3.What payment methods are accepted for ISL6313BCRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6313BCRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6313BCRZ?
ISL6313BCRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6313BCRZ 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 ISL6313BCRZ?
For technical support, including ISL6313BCRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6313BCRZ requirements.
6.How does Aetrix verify that ISL6313BCRZ is sourced from the original manufacturer or authorized distributors?
All ISL6313BCRZ 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 ISL6313BCRZ meets industry standards.
7.What is the process for return or replacement of ISL6313BCRZ?
All ISL6313BCRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6313BCRZ, 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 ISL6313BCRZ part is unused and in its original packaging.
Return procedure for ISL6313BCRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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