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Renesas ISL6334CRZ-T
- Part No.:
- ISL6334CRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334CRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,097
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Product details
Overview
ISL6334CRZ-T from Renesas (formerly Intersil) is a VR11.1-compliant 4-phase PWM controller for microprocessor core voltage regulation, featuring active phase adding/dropping, diode emulation, ±0.5% closed-loop system accuracy over load/line/temperature, and integrated thermal compensation via NTC sensing. It drives synchronous buck converters in high-performance CPU power delivery.
For engineers reviewing the ISL6334CRZ-T datasheet, ISL6334CRZ-T pinout, ISL6334CRZ-T application, or ISL6334CRZ-T equivalent, key selection criteria include VR11.1 compliance, 0°C to +70°C operating range, 40-lead QFN package, IMON-based current reporting, and PSI#-triggered 1-/2-phase light-load operation with diode emulation.
Technical Context
The ISL6334CRZ-T implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to minimize output ripple and improve transient response across 1–4 active phases. It supports both resistor- and DCR-based current sensing for precision droop control and channel-current balancing.
It integrates a differential remote-sense amplifier (±0.5% accuracy), dynamic VID™ for on-the-fly voltage changes, programmable offset via OFS pin, and dual thermal monitoring outputs (VR_HOT/VR_FAN) with digitized NTC input via TM pin - all optimized for Intel VR11.1 CPU power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase interleaved PWM output for reduced ripple and improved transient response |
| Operating Temp | 0°C to +70°C ambient - suitable for commercial-grade motherboard CPU VRMs |
| System Accuracy | ±0.5% over load/line/temperature (VID = 1V–1.6V) - enables tight core voltage regulation |
| Switching Freq | Adjustable up to 1 MHz per phase - allows optimization of efficiency vs. size trade-offs |
| Current Sensing | Differential ISEN+/- inputs support precision resistor or DCR sensing for droop and OCP |
| IMON Output | Analog current monitor pin reporting load current to microprocessor with ±5% accuracy |
| PSI# Support | Active-low signal triggers automatic phase reduction (to 1 or 2 phases) with diode emulation |
Pinout & Package
ISL6334CRZ-T is housed in a RoHS-compliant 40-lead 6×6 mm QFN package (JEDEC MO-220, pkg drawing L40.6x6) with exposed thermal pad. Pin functions are validated per FN6482 Rev 3.00 datasheet, Page 4 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | Microprocessor voltage ID input | 8-bit digital interface for dynamic core voltage selection per VR11.1 spec |
| PSI# | Power State Indicator input | Active-low signal initiates light-load mode: phase dropping + diode emulation |
| IMON | Load current monitor output | Analog voltage proportional to total output current; reported to CPU for telemetry |
| ISEN1±–ISEN4± | Per-phase current sense inputs | Differential inputs for resistor/DCR sensing; enable channel balancing and OCP |
| PWM1–PWM4 | Gate drive outputs | Four independent PWM signals driving external MOSFET drivers (e.g., ISL6612/ISL6622) |
| TM | Thermistor input | Connects to NTC thermistor; enables integrated temperature compensation of current sense |
| VR_RDY | Voltage regulator ready signal | Open-drain output indicating stable output voltage within ±5% VID window |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Fully meets Intel VR11.1 specification including Dynamic VID, PSI#, IMON reporting, and droop requirements |
| Active Phase Management | Automatic 1-/2-/3-/4-phase operation with diode emulation during light load - improves efficiency without sacrificing transient response |
| Differential Remote Sensing | Eliminates ground potential differences between controller and load - ensures accurate regulation and protection |
| Integrated Thermal Compensation | Digitizes NTC temperature via TM pin and compensates current sense gain - maintains droop accuracy across temperature |
| Programmable Offset | OFS pin allows independent voltage offset setting (±100 mV typical) - decouples offset from VID for fine-tuning |
Applications
| Desktop CPU Power Delivery | Laptop CPU Voltage Regulation |
|---|---|
Use Scenario: High-current, fast-transient core supply for Intel Core i5/i7 processors on ATX motherboards. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller coordinating gate drivers, current sensing, and VR_RDY signaling. Use Value: Enables <1% voltage deviation under 50 A/µs load steps while maintaining >90% efficiency at 20% load via PSI#-driven phase dropping. |
Use Scenario: Compact, thermally constrained CPU VRM in thin-and-light notebooks with thermal throttling requirements. IC Role / Device Role / Timing Role: Core voltage controller with integrated NTC-based thermal compensation and VR_HOT/VR_FAN outputs. Use Value: Maintains droop accuracy across 0–70°C ambient using on-chip digitized NTC sensing - eliminates external ADC and reduces BOM count. |
| Workstation Processor VRM | Embedded x86 Platform Power |
Use Scenario: Multi-phase power for Xeon E3/E5 processors in single-socket workstations requiring high reliability. IC Role / Device Role / Timing Role: Precision voltage regulator with average OCP, per-phase current limiting, and fault logging via VR_RDY/PSI# handshake. Use Value: Delivers ±0.5% closed-loop accuracy across full load/line/temp - meets stringent workstation stability requirements. |
Use Scenario: Long-lifecycle x86-based industrial control or network appliance with BIOS-controlled power states. IC Role / Device Role / Timing Role: VR11.1-compliant controller supporting dynamic VID changes and graceful low-power entry/exit via PSI#. Use Value: Supports seamless voltage scaling during runtime - critical for energy-aware embedded OS power management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334ACRZ-T | No diode emulation; uses standard CCM PWM during PSI# mode - compatible with broader driver families (e.g., ISL6612/ISL6596) | Suitable where light-load efficiency is secondary to driver flexibility and cost | Select ISL6334ACRZ-T when using non-Intersil or legacy drivers lacking DE support |
| ISL6334IRZ-T | Extended temperature range (–40°C to +85°C); identical functionality and pinout | Required for industrial or extended-ambient environments beyond 0–70°C | Choose ISL6334IRZ-T for automotive infotainment, telecom, or ruggedized computing platforms |
Compared with ISL6334ACRZ-T and ISL6334IRZ-T, the ISL6334CRZ-T uniquely combines commercial-temp operation with diode emulation - optimizing light-load efficiency for mainstream desktop/laptop VRMs without requiring driver-level compatibility concessions.
Availability
ISL6334CRZ-T is available at Aetrix Electronics and suitable for desktop CPU power delivery, laptop voltage regulation, and workstation processor VRMs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6334CRZ-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) is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for automotive, industrial, and computing markets.
The ISL6334CRZ-T belongs to Renesas' VR11.x multiphase controller product line, engineered specifically for high-efficiency, high-accuracy CPU core voltage regulation in Intel-platform systems with strict transient and thermal requirements.
FAQ
What is the operating temperature range of the ISL6334CRZ-T?
The ISL6334CRZ-T is rated for 0°C to +70°C ambient operation, making it suitable for commercial-grade desktop and laptop motherboard applications. This distinguishes it from the industrial-grade ISL6334IRZ-T (–40°C to +85°C) and confirms its target use in thermally managed consumer computing platforms where extended temperature tolerance is not required.
Does the ISL6334CRZ-T support diode emulation, and how does it affect light-load efficiency?
Yes, the ISL6334CRZ-T supports diode emulation during PSI#-activated light-load operation. When PSI# is asserted, it drops to 1- or 2-phase mode and transmits a special PWM protocol recognized only by compatible drivers like ISL6622/ISL6620. This eliminates body-diode conduction losses, significantly improving efficiency below 20% load - a key advantage over non-DE variants like ISL6334ACRZ-T.
How does the ISL6334CRZ-T achieve ±0.5% system accuracy over load, line, and temperature?
The ISL6334CRZ-T achieves ±0.5% closed-loop system accuracy through a combination of precision internal DAC, differential remote sensing (VDIFF/VSEN), calibrated current sensing paths, and integrated thermal compensation via the TM pin. Its accuracy specification applies specifically to VID voltages from 1.0 V to 1.6 V across the full 0°C to +70°C operating range - verified per FN6482 Rev 3.00 test conditions.
What current sensing methods does the ISL6334CRZ-T support, and how are they implemented?
The ISL6334CRZ-T supports both discrete resistor-based and inductor DCR-based current sensing via dedicated differential ISEN1±–ISEN4± inputs per phase. Resistor sensing uses external sense resistors (e.g., 2 mΩ) for highest accuracy; DCR sensing leverages the inductor's inherent resistance, reducing component count. Both methods feed into the same current balance and overcurrent protection circuitry, with thermal compensation applied via the TM pin input.
Can the ISL6334CRZ-T be used with non-Intersil gate drivers?
The ISL6334CRZ-T's diode emulation mode requires compatible drivers such as ISL6622 or ISL6620 that recognize its special PSI# PWM protocol. For use with generic or third-party drivers, the ISL6334ACRZ-T variant is recommended - it operates in standard CCM mode during PSI# and supports drivers like ISL6612, ISL6596, or ISL6614. The ISL6334CRZ-T itself is not interoperable with non-DE-capable drivers in light-load mode.
ISL6334CRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR11.1
- Voltage - Input:
- 3V ~ 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:
- 40-QFN (6x6)
ISL6334CRZ-T FAQ
1.How can I place an order for ISL6334CRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334CRZ-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 ISL6334CRZ-T reliable?
The price and inventory of ISL6334CRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334CRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6334CRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334CRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334CRZ-T?
ISL6334CRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334CRZ-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 ISL6334CRZ-T?
For technical support, including ISL6334CRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334CRZ-T requirements.
6.How does Aetrix verify that ISL6334CRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6334CRZ-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 ISL6334CRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6334CRZ-T?
All ISL6334CRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334CRZ-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 ISL6334CRZ-T part is unused and in its original packaging.
Return procedure for ISL6334CRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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