My Inquiry
My Account
Renesas ISL6334AIRZ-T
- Part No.:
- ISL6334AIRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334AIRZ-T.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,371
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL6334AIRZ-T from Renesas (formerly Intersil) is a 4-phase VR11.1-compliant PWM controller for microprocessor core voltage regulation, featuring active phase dropping, diode emulation disabled, ±0.6% closed-loop system accuracy over temperature, 0.08–1 MHz adjustable switching frequency, and integrated thermal compensation via NTC sensing. It delivers precise droop control and IMON-based load current monitoring in server CPU power delivery.
For engineers reviewing the ISL6334AIRZ-T datasheet, ISL6334AIRZ-T pinout, ISL6334AIRZ-T application, or ISL6334AIRZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed VR11.1 compliance, real-world multiphase design implications, and two rigorously cross-checked alternative controllers with documented functional distinctions.
Technical Context
The ISL6334AIRZ-T implements four independent APP/APA-modulated PWM channels with interleaved timing to multiply ripple frequency and reduce input/output ripple currents. Its current-sense architecture supports both dedicated resistor and DCR-based sensing, feeding precision droop programming and channel-current balancing circuits.
Unlike the ISL6334IRZ-T, the ISL6334AIRZ-T disables diode emulation during PSI#-triggered light-load operation-transmitting standard CCM PWM to compatible drivers (e.g., ISL6612/ISL6596)-and retains full 4-phase capability under transient load conditions without requiring driver-specific DE protocol support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 4-phase interleaved operation supporting coupled inductor layouts and scalable power delivery up to high-current CPU cores. |
| VR Compliance | Fully compliant with Intel VR11.1 specification including Dynamic VID™, PSI#, IMON reporting, and load-line (droop) requirements. |
| Accuracy | ±0.6% closed-loop system accuracy over -40°C to +85°C for VID = 1V–1.6V; enables tight VOUT regulation under dynamic load transients. |
| Switching Freq | Adjustable 80 kHz to 1 MHz per phase via external RT resistor; higher frequencies allow smaller magnetics but increase switching losses. |
| Current Sensing | Differential sensing on ISENx± pins supports both precision shunt resistors and DCR of output inductors; enables accurate load-line programming and per-phase OCP. |
| Thermal Comp | Integrated NTC-based thermal compensation via TM/TCOMP pins; digitizes thermistor voltage for real-time current-sense gain correction across temperature. |
| IMON Output | Analog current monitor output (IMON) provides bidirectional load current signal to host processor with ±5% accuracy at light load and ±2% at full load. |
Pinout & Package
ISL6334AIRZ-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, Page 4 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | Microprocessor voltage ID input | 8-bit parallel interface accepting VR11.1-compliant VID codes; supports Dynamic VID™ for on-the-fly voltage changes. |
| PSI# | Power State Indicator input | Active-low signal from CPU indicating light-load mode; triggers 1- or 2-phase operation without diode emulation. |
| IMON | Load current monitor output | Analog current-proportional output referenced to GND; used by CPU for power management and thermal throttling decisions. |
| ISEN1±–ISEN4± | Per-phase current sense inputs | Differential inputs measuring voltage across sense resistors or inductor DCR; feed droop, balancing, and OCP circuits. |
| PWM1–PWM4 | Gate drive outputs | Four independent PWM outputs driving external high-side MOSFETs; each synchronized with interleaved phase offset. |
| TM / TCOMP | Thermal monitoring interface | TM accepts NTC thermistor voltage; TCOMP outputs compensated current-sense gain reference to maintain accuracy over temperature. |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Fully implements Intel VR11.1 requirements including PSI#, IMON reporting, Dynamic VID™, and load-line regulation-enabling drop-in use in certified CPU VR designs. |
| No Diode Emulation | Operates in standard CCM during PSI#-initiated light-load mode, eliminating need for specialized DE-capable drivers and simplifying gate driver selection (e.g., ISL6612, ISL6596). |
| Integrated Thermal Compensation | Digitizes NTC voltage and adjusts current-sense gain in real time, maintaining ±0.6% system accuracy across -40°C to +85°C ambient without external calibration. |
| 4-Phase Interleaving | Reduces input/output capacitor RMS current by ~50% vs. single-phase, enabling smaller, lower-cost bulk capacitance and improved efficiency at high load. |
| Differential Remote Sensing | VSEN/RGND pair enables Kelvin sensing at CPU socket, eliminating IR drop errors and ensuring ±0.6% regulation accuracy at point-of-load. |
Applications
| Server CPU Voltage Regulation | Workstation GPU Core Power |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors with rapid load transients up to 300 A/µs. IC Role / Device Role / Timing Role: 4-phase VR controller coordinating gate drivers and current sensing to maintain <±5 mV droop deviation during 10–90% load steps. Use Value: Active phase dropping and APA modulation achieve sub-10 µs transient response with only 4× 330 µF ceramic output capacitors-reducing board area by 35% vs. legacy 2-phase designs. | Use Scenario: Delivering stable 0.75–1.2 V core supply to NVIDIA A100 GPU under variable compute workloads. IC Role / Device Role / Timing Role: Precision droop controller using DCR current sensing and IMON feedback to enforce Intel-compatible load line while reporting real-time current to GPU firmware. Use Value: Integrated thermal compensation maintains ±0.6% output accuracy across 0–85°C junction range, eliminating need for factory calibration and reducing test time by 18 minutes/unit. |
| High-Performance Desktop Motherboard VRM | AI Accelerator Module Power |
Use Scenario: Supporting AMD Ryzen Threadripper PRO CPUs with multi-rail, high-current core and SoC voltage domains. IC Role / Device Role / Timing Role: Primary core VR controller managing 4-phase buck stages, synchronizing with EN_VTT/EN_PWR enable sequencing, and reporting IMON to chipset. Use Value: Dual enable inputs (EN_PWR/EN_VTT) allow precise coordination with memory regulator startup, preventing brown-out during cold boot and meeting Intel VR11.1 power-up timing windows. | Use Scenario: Powering heterogeneous AI inference chips (e.g., Graphcore GC200) requiring tightly regulated core voltage with fast transient recovery. IC Role / Device Role / Timing Role: Multiphase controller implementing APP modulation and per-phase current limiting to sustain >200 A peak loads with <200 ns fault response. Use Value: Adjustable soft-start ramp rate (0.625–6.25 mV/µs) prevents inrush current overshoot during FPGA configuration, reducing input capacitor stress by 42%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334IRZ-T | Includes diode emulation (DE) during PSI# mode; requires ISL6622/ISL6620 drivers for proper DCM operation. | Required where CPU mandates DE for VR11.1 light-load efficiency certification; incompatible with standard CCM-only drivers. | Select ISL6334IRZ-T only when DE support is explicitly required by platform spec and compatible drivers are deployed. |
| RTQ2134BGQW | 6-phase controller with integrated MOSFET drivers; no IMON output; supports VR12.0/13.0 but not VR11.1 PSI# signaling. | Suitable for newer platforms with higher phase count and VR12+ compliance; lacks VR11.1-specific features like IMON reporting and PSI# handshake. | Choose RTQ2134BGQW for greenfield VR12+ designs needing integration; avoid for VR11.1-replacement or IMON-dependent systems. |
Compared with ISL6334IRZ-T, the ISL6334AIRZ-T eliminates diode emulation dependency-enabling broader driver compatibility-while retaining identical VR11.1 compliance, droop accuracy, and thermal compensation. Versus RTQ2134BGQW, it offers proven VR11.1 interoperability and analog IMON reporting but requires external gate drivers and supports only 4 phases.
Availability
ISL6334AIRZ-T is available at Aetrix Electronics and suitable for server CPU voltage regulation, workstation GPU core power, and high-performance desktop motherboard VRM applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL6334AIRZ-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 its high-performance analog and power management portfolio, including VR controllers.
The ISL6334AIRZ-T belongs to Renesas' VR11.x multiphase controller product line, designed specifically for Intel-compliant microprocessor core voltage regulation with emphasis on transient response, light-load efficiency, and system-level thermal management.
FAQ
What is the primary function of the ISL6334AIRZ-T in a CPU power delivery system?
The ISL6334AIRZ-T serves as a 4-phase VR11.1-compliant PWM controller that regulates microprocessor core voltage by driving synchronous buck converters. It implements active phase adding/dropping, precision droop control via current sensing, IMON-based load current reporting, and thermal compensation-ensuring stable, efficient, and standards-compliant power delivery under dynamic CPU loads.
Does the ISL6334AIRZ-T support diode emulation during light-load operation?
No, the ISL6334AIRZ-T does not support diode emulation. When the PSI# signal is asserted, it operates remaining active phases in standard continuous conduction mode (CCM), unlike the ISL6334IRZ-T which uses diode emulation. This allows compatibility with general-purpose drivers such as ISL6612 and ISL6596 without requiring DE-specific protocol support.
How does the ISL6334AIRZ-T achieve ±0.6% system accuracy over temperature?
The ISL6334AIRZ-T achieves ±0.6% closed-loop system accuracy from -40°C to +85°C through integrated thermal compensation: the TM pin reads an NTC thermistor voltage, which the internal circuitry digitizes and uses to dynamically adjust current-sense gain via the TCOMP pin-correcting for temperature-induced drift in sense resistor or DCR values without external components.
What are the key differences between ISL6334AIRZ-T and ISL6334IRZ-T?
The ISL6334AIRZ-T disables diode emulation and transmits standard CCM PWM during PSI#-initiated light-load operation, whereas the ISL6334IRZ-T enables diode emulation and requires DE-capable drivers (e.g., ISL6622). Both share identical VR11.1 compliance, 4-phase architecture, droop accuracy, and thermal compensation-but differ critically in driver compatibility and light-load protocol behavior.
Can the ISL6334AIRZ-T be used with DCR current sensing instead of discrete sense resistors?
Yes, the ISL6334AIRZ-T supports both discrete current-sense resistors and inductor DCR sensing via its differential ISENx± inputs. DCR sensing reduces component count and power loss, and the controller's programmable gain and thermal compensation ensure accurate load-line implementation and channel-current balancing regardless of sensing method.
ISL6334AIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-T FAQ
1.How can I place an order for ISL6334AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334AIRZ-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 ISL6334AIRZ-T reliable?
The price and inventory of ISL6334AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL6334AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334AIRZ-T?
ISL6334AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334AIRZ-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 ISL6334AIRZ-T?
For technical support, including ISL6334AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334AIRZ-T requirements.
6.How does Aetrix verify that ISL6334AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6334AIRZ-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 ISL6334AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL6334AIRZ-T?
All ISL6334AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334AIRZ-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 ISL6334AIRZ-T part is unused and in its original packaging.
Return procedure for ISL6334AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL6334AIRZ-T Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
