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Renesas ISL6314IRZ-T
- Part No.:
- ISL6314IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6314IRZ-T.pdf
- Description:
- IC REG CTRLR VR11 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6314IRZ-T from Intersil is a single-phase buck PWM controller with integrated MOSFET drivers, designed for Intel VR11 and AMD microprocessor core voltage regulation. It delivers ±0.5% system accuracy over temperature, supports up to 1.0MHz switching frequency, and features fully differential DCR current sensing for precise load line programming in space-constrained server and desktop CPU power delivery.
For engineers reviewing the ISL6314IRZ-T datasheet, ISL6314IRZ-T pinout, ISL6314IRZ-T application, or ISL6314IRZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed Intel/AMD DAC table compatibility, and real-world transient response features including Adaptive Phase Alignment (APA) and Active Pulse Positioning (APP).
Technical Context
The ISL6314IRZ-T implements a voltage-mode PWM control architecture with an internal oscillator adjustable from 80kHz to 1.0MHz via external RT resistor. Its error amplifier features 96dB DC gain and 40MHz gain-bandwidth product, enabling stable loop compensation across wide output voltage ranges (0.375V–1.600V).
It integrates dual gate drivers with 1.25Ω upper-source and 0.60Ω lower-sink resistance at 12V PVCC, adaptive shoot-through protection, and programmable droop-based load-line control via ISEN+/-/ISENO pins. The controller decodes 8-bit VID inputs into three selectable DAC tables: Intel VR11, AMD 5-bit, and AMD 6-bit - selected by SS and VID7 pin states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +85°C - qualified for industrial-grade CPU power applications requiring extended thermal margin. |
| Switching Frequency | Up to 1.0MHz - enables smaller magnetics and faster transient response in high-density VRMs. |
| System Accuracy | ±0.5% (1.000–1.600V range) - ensures tight core voltage regulation under dynamic load conditions per Intel VR11 spec. |
| VID Compatibility | Intel VR11 + AMD 5-/6-bit DAC - supports legacy and contemporary microprocessors without firmware change. |
| Gate Drive Bias | 5V to 12V on PVCC - allows optimization of MOSFET switching loss vs. conduction loss trade-off. |
| DCR Sensing | Fully differential, continuous - eliminates need for sense resistors, reduces power loss, and improves current measurement accuracy. |
| Oscillator Accuracy | ±10% (215–280kHz typ. at RT=100kΩ) - sufficient for stable multi-rail synchronization in complex power systems. |
Pinout & Package
ISL6314IRZ-T is housed in a 32-lead 5mm × 5mm QFN package with exposed thermal pad (PKG DWG # L32.5x5B). Pin 33 is the exposed metal ground pad, thermally and electrically connected to internal GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (18) | Bias supply input | +5V ±5% small-signal rail; powers logic, reference, and error amp - requires 0.1µF ceramic decoupling. |
| PVCC (19) | Power gate drive supply | +5V to +12V source for UGATE/LGATE drivers - sets MOSFET turn-on speed and RDS(on) utilization. |
| EN (17) | Enable control | 0.86V threshold enable; hysteresis ensures noise-immune startup/shutdown sequencing with host processor. |
| VID0–VID7 (25–32,31) | Digital voltage ID inputs | 8-bit parallel interface decoded into VR11/AMD DAC tables - internal 40µA pull-ups (Intel) or 20µA pull-downs (AMD) simplify host connection. |
| UGATE (23), LGATE (21) | MOSFET gate drivers | Integrated high-side/low-side drivers with <10ns non-overlap - eliminate external driver ICs and reduce layout complexity. |
| ISEN+, ISEN−, ISENO (16,15,14) | DCR current sense interface | Supports Kelvin-connected inductor DCR sensing - enables accurate load-line programming without shunt resistor losses. |
| FS (3), SS (2) | Frequency & mode select | RT resistor on FS sets fSW; SS tie determines DAC table (GND = VR11, VCC = AMD) - no configuration firmware needed. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Phase Alignment (APA) | Activates channel during high di/dt transients using COMP-APA voltage offset - reduces required bulk capacitance by up to 30% in CPU VRMs. |
| Active Pulse Positioning (APP) | Enables sub-cycle PWM edge placement - cuts voltage droop during 10A/µs load steps without ringback artifacts. | Differential Remote Sensing | VSEN–RGND measurement compensates PCB IR drop - maintains ±0.5% regulation accuracy at microprocessor die despite 50mV trace drop. |
| Programmable Reference Offset | OFS pin sinks or sources 49.4µA - allows ±1% VOUT adjustment via single resistor to meet custom voltage margins or aging compensation. |
| Multi-tier Overvoltage Protection | Dual OV thresholds (soft-start default +127mV, post-SS +175mV for VR11) - prevents false trips during VID transitions while ensuring fast fault shutdown. |
Applications
| Server CPU Core VRM | Desktop AMD Platform Power |
|---|---|
Use Scenario: Single-phase 12V-input VRM delivering 0.8–1.5V/30A to dual-core Xeon or Opteron processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary PWM controller with integrated drivers, VID decoding, and DCR-based current sensing - manages full power stage timing and protection. Use Value: Eliminates discrete driver IC and external current sense resistor, reducing BOM count by 4 parts and PCB area by 18mm² per phase. | Use Scenario: Compact ATX motherboard VRM supporting AMD K10/K11 CPUs with dynamic VID scaling during Turbo Core operation. IC Role / Device Role / Timing Role: Voltage regulator controller implementing AMD 6-bit DAC table and droop-based load-line - synchronizes with CPU's real-time VID updates. Use Value: APA+APP features cut peak undershoot from 95mV to 42mV during 15A/µs load steps, enabling use of only two 1000µF polymer caps instead of four. |
| Laptop CPU Power Module | Embedded x86 SBC Power |
Use Scenario: Low-profile 5V-input VRM on ultrabook motherboard supplying 1.05V/12A to Intel Core i5 ULV processor. IC Role / Device Role / Timing Role: Single-phase buck controller with digital soft-start and PGOOD monitoring - coordinates power-up sequence with EC and chipset. Use Value: ±0.5% system accuracy over –40°C to +85°C ensures stable operation across ambient extremes without calibration. | Use Scenario: Industrial single-board computer powering Atom E3800-series SoC with thermal compensation via NTC on OFS pin. IC Role / Device Role / Timing Role: Core voltage controller with remote sensing and programmable offset - adapts output voltage based on junction temperature drift. Use Value: OFS-driven offset compensates for 12mV/VDD thermal coefficient, maintaining 1.32V ±15mV at 105°C junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | Two-phase controller with identical VID/DAC support and APA/APP features; adds phase-interleaving and current balancing. | Targeted at higher-current CPUs (>40A); requires dual MOSFET stages and inter-phase timing coordination. | Select ISL6322IRZ only when >30A output current or tighter ripple requirements justify added complexity and cost. |
| RT8803AGQW | Single-phase VR11 controller with 0.5% accuracy but no AMD DAC support; uses resistor-based current sensing instead of DCR. | Limited to Intel platforms; lacks differential remote sensing and programmable offset - less suitable for high-precision AMD designs. | Choose RT8803AGQW for cost-sensitive Intel-only designs where board space permits external sense resistors and thermal compensation is not required. |
Compared with ISL6314IRZ-T, ISL6322IRZ offers scalable multi-phase capability but increases layout complexity, while RT8803AGQW reduces cost at the expense of AMD compatibility and DCR sensing efficiency - making ISL6314IRZ-T optimal for balanced performance, flexibility, and integration in mixed-platform designs.
Availability
ISL6314IRZ-T is available at Aetrix Electronics and suitable for server CPU VRMs, desktop AMD platform power, laptop CPU modules, and embedded x86 SBCs requiring stable component supply with industrial temperature support and long-term lifecycle assurance.
Supply support for ISL6314IRZ-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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-performance voltage regulators and precision analog solutions.
The ISL6314IRZ-T belongs to Intersil's VR11-compliant CPU power controller family, engineered specifically for low-voltage, high-current microprocessor core regulation with minimal external components and robust transient response.
FAQ
What is the operating temperature range for the ISL6314IRZ-T?
The ISL6314IRZ-T is rated for –40°C to +85°C ambient operation, matching the industrial temperature grade specified in the FN6455 datasheet. This range supports deployment in demanding environments such as server racks and industrial embedded systems where thermal management is critical. The device incorporates thermal shutdown at 160°C junction temperature with 100°C recovery hysteresis, ensuring reliable protection without latch-up. All electrical specifications, including ±0.5% system accuracy, are guaranteed across this full range.
How does the ISL6314IRZ-T support both Intel VR11 and AMD microprocessors?
The ISL6314IRZ-T supports both Intel VR11 and AMD platforms through hardware-selectable DAC tables: Intel VR11 mode activates when the SS pin is tied to GND, while AMD 5-bit or 6-bit modes engage when SS is tied to VCC (with VID7 determining bit depth). Internal VID pull-up (40µA) or pull-down (20µA) current sources match respective logic thresholds, and the same 8-bit VID bus decodes into discrete voltages per Tables 2–4 in the datasheet. No firmware or register writes are needed - selection is purely pin-strapped.
What is the purpose of the APA pin on the ISL6314IRZ-T?
The APA (Adaptive Phase Alignment) pin on the ISL6314IRZ-T sets the trip threshold for transient-response enhancement. A 100µA current flows from APA to COMP through an external resistor (RAPA), generating a DC offset that triggers early upper-FET turn-on during high di/dt load steps. With RAPA = 5kΩ, the trip level is 500mV - recommended for most CPU applications. This feature reduces voltage undershoot by up to 55% compared to standard PWM control, directly improving system stability during sudden core activity bursts.
Can the ISL6314IRZ-T be used with DCR current sensing, and how is it configured?
Yes, the ISL6314IRZ-T supports fully differential, continuous DCR current sensing via ISEN+, ISEN−, and ISENO pins. To configure: connect ISEN− to the phase node (upper MOSFET source), ISEN+ to the output inductor's VOUT side, and place an RC feedback network between ISEN− and ISENO. This creates a voltage proportional to inductor DCR drop, which is summed with VSEN–RGND at VDIFF for droop-based load-line programming - eliminating external sense resistors and associated power loss.
What are the key differences between ISL6314IRZ-T and ISL6314CRZ-T?
The ISL6314IRZ-T and ISL6314CRZ-T share identical functionality and pinout but differ in temperature rating and oscillator accuracy: ISL6314IRZ-T operates from –40°C to +85°C with ±10% fSW tolerance (215–280kHz typ. at RT=100kΩ), while ISL6314CRZ-T is commercial-grade (0°C to +70°C) with ±9% tolerance (225–275kHz typ.). Both use the same 32-lead 5×5 QFN package and support identical VID tables, APA/APP features, and protection schemes - making IRZ-T the choice for industrial and extended-temperature deployments.
ISL6314IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR11, AMD CPU
- Voltage - Input:
- 5V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.38V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ISL6314IRZ-T FAQ
1.How can I place an order for ISL6314IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6314IRZ-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 ISL6314IRZ-T reliable?
The price and inventory of ISL6314IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6314IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6314IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6314IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6314IRZ-T?
ISL6314IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6314IRZ-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 ISL6314IRZ-T?
For technical support, including ISL6314IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6314IRZ-T requirements.
6.How does Aetrix verify that ISL6314IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6314IRZ-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 ISL6314IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6314IRZ-T?
All ISL6314IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6314IRZ-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 ISL6314IRZ-T part is unused and in its original packaging.
Return procedure for ISL6314IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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