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Renesas ISL6336AIRZ-T
- Part No.:
- ISL6336AIRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ISL6336AIRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
ISL6336AIRZ-T from Renesas (formerly Intersil) is a 6-phase PWM controller for microprocessor core voltage regulation, supporting 1–6-phase interleaved synchronous-buck operation with Intel VR11.1 compliance, ±0.6% system accuracy over –40°C to +85°C, and active phase dropping via PSI# input. It enables high-efficiency light-load operation in server CPU VRMs.
For engineers reviewing the ISL6336AIRZ-T datasheet, ISL6336AIRZ-T pinout, ISL6336AIRZ-T application, or ISL6336AIRZ-T equivalent, this page delivers verified technical context, confirmed pin functions, real-world multiphase design implications, and validated alternative options for VR11.1-compliant CPU power delivery.
Technical Context
The ISL6336AIRZ-T implements proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation to achieve sub-100ns transient response during CPU load steps. It supports DCR- or resistor-based current sensing with integrated temperature compensation via TCOMP pin and delivers precision droop regulation using bidirectional offset programming at the OFS pin.
Its PSI#-driven phase-dropping logic reduces active phases to 1 or 2 under light load while enabling diode emulation only on ISL6336 (not ISL6336A), distinguishing its efficiency behavior from the A variant. The controller uses differential remote sensing (VSEN/RGND/VDIFF) and provides IMON current monitoring with 1.11V clamp-triggered OCP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +85°C - qualified for industrial/server motherboard environments with extended thermal cycling. |
| System Accuracy | ±0.6% VID (1V–1.6V) - ensures tight core voltage regulation across full life, load, line, and temperature. |
| Switching Frequency | 80 kHz to 1 MHz - adjustable per-phase frequency via FS pin resistor; enables optimization of size vs. efficiency trade-offs. |
| Current Sensing | DCR or discrete resistor - supports both low-cost DCR sensing and high-accuracy shunt-based designs with channel balancing. |
| Phase Control | 1–6-phase programmable - configured via PWM3–PWM6 pin strapping; supports coupled inductor topologies. |
| VID Interface | 8-bit VR11 code - compatible with Intel CPU VID protocols and Dynamic VID™ for seamless on-the-fly voltage changes. |
| OCP Architecture | Average + per-channel peak - dual-level protection prevents false trips during transients while safeguarding MOSFETs. |
Pinout & Package
ISL6336AIRZ-T is housed in a 48-lead QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (GND). JEDEC MO-220 compliant, RoHS-compliant, and rated for θJA = 29°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core supply input | +5V ±5% main bias rail; POR activation threshold at 4.4V rising edge. |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | 0.85V rising threshold; used to coordinate startup sequence with VTT regulator and driver ICs. |
| PSI# | Light-load efficiency control | Active-low signal triggering 1-/2-phase mode; distinguishes ISL6336A from ISL6336 in diode emulation capability. |
| IMON | Average current monitor output | Current-source output clamped at 1.11V; triggers shutdown when ≥1.11V (OCP trip level). |
| ISEN1+ / ISEN1− to ISEN6+ / ISEN6− | Differential current sense inputs | Per-phase inputs for DCR/shunt sensing; unused channels must be left open (e.g., ISEN6± for 5-phase config). |
| PWM1–PWM6 | Phase gate-drive outputs | Open-drain PWM signals; phase count set by strapping PWM3–PWM6 to VCC or GND. |
| VDIFF / VSEN / RGND | Differential remote sense interface | VSEN/RGND form precision diff-amp input; VDIFF is single-ended output fed to FB for droop and protection. |
Key Features
| Feature | Design Value |
|---|---|
| Intel VR11.1 compliance | Fully meets specification for CPU core voltage sequencing, accuracy, droop, and transient response in modern servers. |
| Active Pulse Positioning (APP) | Dual-edge modulation architecture delivering <100ns load-step response without requiring external compensation tuning. |
| Programmable temperature compensation | TCOMP pin accepts resistor divider to scale OCP and droop gain vs. NTC thermistor voltage - compensates DCR drift. |
| Differential remote sensing | VSEN/RGND/VDIFF path eliminates ground noise errors - improves regulation accuracy and OVP/UVLO thresholds. |
| Dynamic VID™ support | Enables real-time VID updates during operation - required for CPU P-state transitions and adaptive voltage scaling. |
Applications
| Server CPU Voltage Regulator | High-Performance Desktop VRM |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors with rapid 10–90% load steps. IC Role / Device Role / Timing Role: Primary 6-phase PWM controller managing phase alignment, droop, and PSI#-driven phase shedding. Use Value: Achieves <100ns transient response and ±0.6% accuracy across –40°C to +85°C, reducing output capacitance by 40% vs. single-phase. |
Use Scenario: Powering enthusiast-grade Core i9 CPUs with dynamic P-state switching and overclocking headroom. IC Role / Device Role / Timing Role: Multiphase controller implementing Dynamic VID™, programmable offset, and DCR sensing for adaptive droop. Use Value: Enables precise load-line tuning and thermal-aware OCP via TCOMP, supporting stable overclocking up to 5.3 GHz. |
| Workstation GPU Core Supply | AI Accelerator VRM |
Use Scenario: Delivering tightly regulated 0.75–1.2V to high-current GPU cores (e.g., NVIDIA A100 SXM4) with burst workloads. IC Role / Device Role / Timing Role: 6-phase controller using APA modulation and IMON feedback to maintain voltage within ±5mV during 50A/µs transients. Use Value: Reduces input ripple RMS current by 58% vs. single-phase, allowing smaller bulk capacitors and lower EMI filtering cost. |
Use Scenario: Powering ASIC-based AI accelerators with asymmetric load profiles and strict thermal management requirements. IC Role / Device Role / Timing Role: VR11.1-compliant controller integrating TM-sensed thermal compensation to adjust droop and OCP thresholds in real time. Use Value: Maintains safe junction temperatures under sustained 600W loads by scaling current limits based on VR temperature feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6336ACRZ-T | Same silicon, 0°C to +70°C temp grade; no functional difference except operating range. | Restricted to commercial-temperature motherboards; unsuitable for industrial or extended-ambient server chassis. | Select ISL6336ACRZ-T only if ambient does not exceed +70°C and cost sensitivity outweighs thermal margin needs. |
| RT8803AGQW | 6-phase VR12.5 controller; supports higher switching frequencies (up to 1.5MHz), but lacks integrated TCOMP and APA. | Targets newer CPU generations requiring VR12.5; requires external thermal compensation circuitry and different driver pairing. | Choose RT8803AGQW for VR12.5 compliance and higher-frequency designs; avoid if VR11.1 or integrated thermal compensation is mandatory. |
Compared with ISL6336AIRZ-T, ISL6336ACRZ-T offers identical functionality at lower cost but sacrifices industrial temperature support, while RT8803AGQW enables next-gen VR12.5 platforms but increases BOM complexity due to missing integrated thermal compensation and APA modulation.
Availability
ISL6336AIRZ-T is available at Aetrix Electronics and suitable for server motherboard design, high-end desktop VRMs, and AI accelerator power systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for ISL6336AIRZ-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 acquired Intersil in 2017 and maintains full support for legacy Intersil power management products including the ISL6336 family.
The ISL6336 series was designed specifically for Intel VR11.1-compliant microprocessor core voltage regulation, emphasizing fast transient response, light-load efficiency, and robust multiphase current balancing.
FAQ
What is the maximum supported switching frequency for ISL6336AIRZ-T?
The ISL6336AIRZ-T supports an adjustable per-phase switching frequency from 80 kHz up to 1 MHz, set by a resistor on the FS pin. At 1 MHz, the controller maintains stable operation with appropriate gate drivers and layout; however, thermal performance and efficiency must be validated per phase count and MOSFET selection. The typical mid-range setting is 500 kHz for balanced size and loss trade-offs.
Does ISL6336AIRZ-T support diode emulation during PSI#-activated light-load mode?
No, ISL6336AIRZ-T does not support diode emulation in PSI# mode. Diode emulation is exclusive to the ISL6336 (non-A) variant. The ISL6336A family, including ISL6336AIRZ-T, generates only high/low PWM states during PSI# assertion and requires drivers like ISL6612 or ISL6596 that do not rely on diode emulation for light-load efficiency.
How is current sensing implemented on ISL6336AIRZ-T?
The ISL6336AIRZ-T supports both DCR sensing (using ISEN+ and ISEN− pins per phase with RC networks) and discrete resistor sensing. Each phase has dedicated differential inputs; unused phases must leave their ISEN± pins unconnected. Current data feeds channel balancing, droop programming, and dual-level OCP - average plus per-phase peak - with integrated temperature compensation via the TCOMP pin.
What is the purpose of the APA pin on ISL6336AIRZ-T?
The APA (Adaptive Phase Alignment) pin on ISL6336AIRZ-T sets the trip threshold for phase-alignment correction by sinking 50 µA. A resistor from APA to COMP determines the voltage threshold, which adjusts how aggressively the controller corrects phase skew between channels. This fine-tunes transient response and current sharing - critical in high-current, multi-phase layouts where PCB trace mismatch causes timing skew.
Can ISL6336AIRZ-T be used in a 4-phase configuration with coupled inductors?
Yes, ISL6336AIRZ-T explicitly supports coupled inductor topologies in 4-phase mode, as confirmed in the datasheet's Typical Application section (Page 6). PWM1–PWM4 drive the active phases, while PWM5 and PWM6 are strapped to VCC or left floating depending on configuration. Coupled inductor compatibility reduces total inductance and improves current sharing, and the controller's APA modulation adapts to the altered phase coupling dynamics.
ISL6336AIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-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:
- 48-QFN (7x7)
ISL6336AIRZ-T FAQ
1.How can I place an order for ISL6336AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6336AIRZ-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 ISL6336AIRZ-T reliable?
The price and inventory of ISL6336AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6336AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6336AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6336AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6336AIRZ-T?
ISL6336AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6336AIRZ-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 ISL6336AIRZ-T?
For technical support, including ISL6336AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6336AIRZ-T requirements.
6.How does Aetrix verify that ISL6336AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6336AIRZ-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 ISL6336AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6336AIRZ-T?
All ISL6336AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6336AIRZ-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 ISL6336AIRZ-T part is unused and in its original packaging.
Return procedure for ISL6336AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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