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Renesas ISL6334AIRZ-TR5368
- Part No.:
- ISL6334AIRZ-TR5368
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334AIRZ-TR5368.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,879
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Product details
Overview
ISL6334AIRZ-TR5368 from Renesas (formerly Intersil) is a VR11.1-compliant 4-phase PWM controller for microprocessor core voltage regulation, featuring active phase adding/dropping, ±0.6% closed-loop system accuracy over -40°C to +85°C, 0.08–1 MHz adjustable switching frequency, and IMON-based load current monitoring. It drives synchronous buck converters in high-performance computing power delivery.
For engineers reviewing the ISL6334AIRZ-TR5368 datasheet, ISL6334AIRZ-TR5368 pinout, ISL6334AIRZ-TR5368 application, or ISL6334AIRZ-TR5368 equivalent, this device supports Intel VR11.1 dynamic VID, differential remote sensing, precision droop control via DCR/resistor current sensing, thermal compensation via NTC, and PSI#-triggered light-load efficiency enhancement with diode emulation.
Technical Context
The ISL6334AIRZ-TR5368 implements four independent APP (Active Pulse Positioning) and APA (Adaptive Phase Alignment) modulators, each driving one PWM output (PWM1–PWM4), with synchronized interleaving to multiply ripple frequency by up to 4× and reduce input/output ripple currents. Its error amplifier delivers 96 dB open-loop gain and 80 MHz bandwidth for fast transient response.
Current sensing uses differential ISEN+/- inputs per phase for channel balancing, average OCP (trip at 88–106 µA), and peak OCP (115–146 µA); IMON provides thermally compensated average load current output clamped at 1.11 V. The controller integrates TCOMP-based thermal scaling of droop and OCP thresholds using TM-pin NTC voltage feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | 1–4-phase operation, configurable via PWM2–PWM4 logic levels and PSI# state |
| System Accuracy | ±0.6% VID (1V–1.6V range, -40°C to +85°C), enabling tight CPU core voltage regulation |
| Switching Frequency | 0.08–1 MHz per phase, set by external FS resistor, supporting high-efficiency, low-ESR designs |
| Current Sensing | Differential ISEN+/- inputs per phase; supports DCR or discrete sense resistor; IMON output scaled to load current |
| Thermal Compensation | Integrated TCOMP scaling of droop and OCP thresholds using TM-pin NTC voltage, eliminating external compensation circuitry |
| VID Interface | 8-bit Dynamic VID™ compliant with VR11.1; supports on-the-fly voltage changes without reprogramming |
| OCP Protection | Average OCP trip: 88–106 µA (CCM), 96 µA (PSI# mode); peak OCP: 115–146 µA per phase |
| Package | 40-lead 6×6 mm QFN (JEDEC MO-220), RoHS-compliant, θJA = 32°C/W, θJC = 2°C/W |
Pinout & Package
ISL6334AIRZ-TR5368 is housed in a 40-lead, 6 mm × 6 mm, 0.5 mm pitch QFN package (JEDEC MO-220, drawing L40.6x6) with exposed thermal pad. Pin 1 is top-left corner (marked dot), pin count proceeds counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary supply input | +5 V ±5% bias rail; powers internal circuitry; POR threshold 4.3–4.5 V rising |
| GND | Reference ground | Local IC ground reference; bottom thermal pad is GND; connects to PCB ground plane |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | 0.875–0.920 V rising threshold; synchronizes startup with driver/VTT rails; clears faults when pulled below 0.77 V |
| PWM1–PWM4 | Phase gate-drive outputs | Four independent PWM signals; logic level determines active phase count (e.g., tie PWM2 to VCC for 1-phase) |
| ISEN1+/- to ISEN4+/- | Differential current sense inputs | Per-phase sensing for droop, balancing, and OCP; inactive channels require open ISEN pins |
| IMON | Average load current monitor | Thermally compensated analog output; 1.11 V clamped; used for CPU current reporting and OCP override |
| PSI# | Processor sleep indicator | Active-low signal triggering 1-/2-phase operation with diode emulation for light-load efficiency |
| TM / TCOMP | Thermal monitoring interface | TM accepts NTC voltage; TCOMP sets gain for integrated thermal compensation of current sense and OCP |
| VDIFF / VSEN / RGND | Differential remote sense amplifier | VSEN/RGND measure remote output voltage; VDIFF feeds FB/COMP loop for improved regulation accuracy |
| VID0–VID7 | VR11.1 voltage identification inputs | 8-bit bus setting target core voltage; supports Dynamic VID™ for seamless on-the-fly adjustments |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 Compliance | Fully satisfies VR11.1 specification including Dynamic VID™, PSI#, IMON reporting, and droop requirements |
| Active Pulse Positioning (APP) | Dual-edge PWM modulation per phase enables faster transient response than conventional single-edge schemes |
| Adaptive Phase Alignment (APA) | Real-time phase skew correction maintains optimal interleaving under load and temperature variation |
| Diode Emulation in PSI# Mode | Enables discontinuous conduction mode in dropped phases, reducing core and switching losses at light load |
| Differential Remote Sensing | Eliminates ground offset errors between controller and CPU socket, improving regulation accuracy and protection fidelity |
| Integrated Thermal Compensation | Uses TM/TCOMP to auto-adjust droop slope and OCP thresholds based on NTC-measured VR temperature |
Applications
| Server CPU Core Power Delivery | Workstation GPU Voltage Regulation |
|---|---|
|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring sub-1% voltage tolerance and rapid load transients up to 100 A/µs. IC Role / Device Role / Timing Role: Primary 4-phase VR controller coordinating gate drivers, sensing output current via IMON, and reporting thermal status via VR_HOT/VR_FAN. Use Value: Achieves ±0.6% closed-loop accuracy across -40°C to +85°C and supports PSI#-driven phase dropping to maintain >90% efficiency at 5% load. |
Use Scenario: Dual-GPU workstations with PCIe-connected GPUs demanding tightly coupled, independently regulated core and memory rails. IC Role / Device Role / Timing Role: Core voltage controller implementing DCR current sensing and adaptive droop to match GPU dynamic power states. Use Value: Uses APP/APA modulation to suppress 50–100 MHz transient-induced output voltage spikes without increasing bulk capacitance. |
| High-End Desktop Motherboard VRM | AI Accelerator Board Power Management |
|
Use Scenario: Enthusiast desktop platforms with overclockable CPUs requiring precise voltage positioning and real-time thermal derating. IC Role / Device Role / Timing Role: Main VR controller interfacing with CPU's VR_READY and PSI# signals while providing IMON feedback to firmware. Use Value: Leverages integrated TCOMP scaling to adjust droop slope and OCP thresholds in real time as VR temperature rises during sustained boost clocks. |
Use Scenario: Edge AI inference cards with heterogeneous compute units (CPU + FPGA + NPU) needing coordinated, phase-scalable power domains. IC Role / Device Role / Timing Role: Scalable core regulator supporting dynamic phase activation/deactivation per workload profile via PSI# and VID updates. Use Value: Enables 1-phase operation during idle inference cycles and automatic 4-phase ramp-up for burst matrix multiplication, minimizing standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6336IRZ | 6-phase capable; higher max switching frequency (1.2 MHz); adds VR12.0 support and enhanced telemetry | Required for newer CPUs with VR12.0 compliance; supports higher current density and finer VID resolution | Select ISL6336IRZ only if VR12.0 compliance, >4-phase capability, or extended telemetry (e.g., per-phase temp) is required. |
| RT8803AGQW | 4-phase, VR11.1-compliant; lower quiescent current (12 mA vs. 16 mA); no integrated thermal compensation | Lacks TCOMP/TM interface; requires external thermal compensation circuitry for accurate droop over temperature | Choose RT8803AGQW for cost-sensitive designs where thermal compensation is handled externally or not required. |
Compared with ISL6334AIRZ-TR5368, ISL6336IRZ extends phase count and protocol support but increases BOM complexity, while RT8803AGQW reduces cost and power but sacrifices integrated thermal compensation-making ISL6334AIRZ-TR5368 optimal for VR11.1 systems requiring self-contained, temperature-aware droop control.
Availability
ISL6334AIRZ-TR5368 is available at Aetrix Electronics and suitable for server CPU core power delivery, workstation GPU voltage regulation, high-end desktop motherboard VRMs, and AI accelerator board power management requiring stable component supply across industrial temperature ranges.
Supply support for ISL6334AIRZ-TR5368 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 continues its high-performance analog and power management portfolio. Renesas specializes in robust, automotive- and industrial-grade power ICs with strong focus on reliability and longevity.
The ISL6334AIRZ-TR5368 belongs to Renesas' VR11.x multiphase controller product line, designed specifically for Intel-compatible microprocessor core voltage regulation in servers, workstations, and high-end computing platforms.
FAQ
What is the operating temperature range for the ISL6334AIRZ-TR5368?
The ISL6334AIRZ-TR5368 is rated for operation from -40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in server chassis, high-density workstations, and thermally constrained embedded computing environments where ambient temperatures exceed commercial limits. The part marking "IRZ" explicitly denotes this extended temperature grade.
How does the ISL6334AIRZ-TR5368 implement light-load efficiency enhancement?
The ISL6334AIRZ-TR5368 enhances light-load efficiency by entering 1- or 2-phase operation when the PSI# signal is asserted low, combined with diode emulation on dropped phases. This reduces magnetic core losses and switching losses while maintaining fast transient response upon PSI# de-assertion. The controller automatically re-adds phases to sustain heavy-load performance without firmware intervention.
Can the ISL6334AIRZ-TR5368 be used with both DCR and discrete current sense resistors?
Yes, the ISL6334AIRZ-TR5368 supports both DCR-based and discrete resistor-based current sensing via its differential ISEN+/- inputs per phase. For DCR sensing, ISEN- connects to the RC network node and ISEN+ ties through RISEN to the capacitor; for discrete sensing, the resistor is placed in series with the high-side FET source. Both methods feed the same droop, balancing, and OCP circuits within ISL6334AIRZ-TR5368.
What is the function of the TCOMP pin on the ISL6334AIRZ-TR5368?
The TCOMP pin on the ISL6334AIRZ-TR5368 sets the gain for integrated thermal compensation of both the load-line (droop) slope and overcurrent protection thresholds. By connecting a resistor divider between VCC and GND with the center tap at TCOMP, designers scale how strongly the TM-pin NTC voltage adjusts current-sense gain-enabling accurate, self-compensated regulation across the full -40°C to +85°C range without external op-amps.
Does the ISL6334AIRZ-TR5368 support Dynamic VID™ technology?
Yes, the ISL6334AIRZ-TR5368 fully supports Dynamic VID™ technology as required by Intel VR11.1. Its 8-bit VID interface (VID0–VID7) allows the CPU to change the target output voltage on-the-fly during operation without interrupting regulation or requiring controller reset. The internal DAC and REF/DAC offset circuitry ensure smooth, glitch-free transitions between VID codes.
ISL6334AIRZ-TR5368 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6334AIRZ-TR5368 FAQ
1.How can I place an order for ISL6334AIRZ-TR5368 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334AIRZ-TR5368 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 ISL6334AIRZ-TR5368 reliable?
The price and inventory of ISL6334AIRZ-TR5368 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334AIRZ-TR5368 is usually 5 days.
3.What payment methods are accepted for ISL6334AIRZ-TR5368?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334AIRZ-TR5368 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334AIRZ-TR5368?
ISL6334AIRZ-TR5368 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334AIRZ-TR5368 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 ISL6334AIRZ-TR5368?
For technical support, including ISL6334AIRZ-TR5368 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334AIRZ-TR5368 requirements.
6.How does Aetrix verify that ISL6334AIRZ-TR5368 is sourced from the original manufacturer or authorized distributors?
All ISL6334AIRZ-TR5368 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 ISL6334AIRZ-TR5368 meets industry standards.
7.What is the process for return or replacement of ISL6334AIRZ-TR5368?
All ISL6334AIRZ-TR5368 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334AIRZ-TR5368, 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 ISL6334AIRZ-TR5368 part is unused and in its original packaging.
Return procedure for ISL6334AIRZ-TR5368:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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