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Renesas ISL6334ACRZR5368
- Part No.:
- ISL6334ACRZR5368
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6334ACRZR5368.pdf
- Description:
- IC REG CTRLR VR11.1 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,141
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Product details
Overview
ISL6334ACRZR5368 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, 0.08–1 MHz adjustable switching frequency, and precision DCR/resistor-based current sensing with IMON output. It enables high-efficiency, fast-transient response power delivery in server and desktop CPU VRMs.
For engineers reviewing the ISL6334ACRZR5368 datasheet, ISL6334ACRZR5368 pinout, ISL6334ACRZR5368 application, or ISL6334ACRZR5368 equivalent, key selection considerations include VR11.1 compliance, PSI#-driven 1–4-phase scalability, thermal-compensated current monitoring via TM/TCOMP, remote differential sensing (VDIFF/VSEN/RGND), and compatibility with Intersil drivers including ISL6622/ISL6612/ISL6614.
Technical Context
The ISL6334ACRZR5368 implements a proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation scheme to deliver sub-100 ns transient response while maintaining constant switching frequency. Its four independent PWM outputs (PWM1–PWM4) support interleaved synchronous-buck operation with programmable phase count (1–4) via PSI#, FS, and SS pin logic decoding.
Current sensing uses differential inputs (ISEN1± through ISEN4±) for per-phase DCR or discrete resistor measurement, feeding channel-current balancing, average overcurrent protection (88–106 µA trip), and droop control via FB pin current sourcing. Integrated thermal compensation adjusts OCP and IDROOP based on NTC voltage at TM pin, scaled by TCOMP resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Count | Configurable 1–4-phase operation; phase dropping/addition triggered by PSI# signal for light-load efficiency. |
| VR Compliance | Fully compliant with Intel VR11.1 specification, including Dynamic VID™, 8-bit VID input, and precise IMON reporting. |
| System Accuracy | ±0.5% over load/line/temperature (VID = 1–1.6 V, TJ = 0°C to +70°C); enables tight core voltage regulation under dynamic loads. |
| Switching Frequency | Adjustable 80 kHz to 1 MHz per phase via FS pin resistor; supports high-density layout with reduced EMI and smaller magnetics. |
| Current Sensing | Differential DCR or discrete resistor sensing with ±5% tolerance; enables accurate droop programming and channel balancing. |
| Thermal Compensation | Integrated NTC-based temperature scaling via TM/TCOMP pins; dynamically adjusts OCP threshold and droop slope vs. temperature. |
| Output Monitoring | IMON pin provides thermally compensated average load current output (clamped at 1.11 V); used for processor telemetry and OCP. |
Pinout & Package
ISL6334ACRZR5368 is housed in a Pb-free, RoHS-compliant 40-lead QFN package (6 mm × 6 mm, JEDEC MO-220 QFN outline, L40.6x6), with exposed thermal pad on underside (θJC = 2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary supply input | +5 V ±5% bias rail; powers internal circuitry; POR thresholds at 4.3–4.5 V (rising), 3.75–4.0 V (falling). |
| EN_PWR / EN_VTT | Threshold-sensitive enable inputs | Both require 0.875–0.920 V to activate; falling below 0.735–0.770 V clears faults and primes soft-start. |
| PWM1–PWM4 | Phase gate-drive outputs | Four independent CMOS PWM outputs; logic level determines active phase count (e.g., tie PWM2 to VCC for 1-phase mode). |
| ISEN1±–ISEN4± | Differential current sense inputs | Per-phase inputs for DCR or resistor-based current measurement; unused channels must be left open. |
| IMON | Average load current monitor | Output voltage proportional to load current (clamped at 1.11 V); feeds microprocessor PSI# coordination and OCP shutdown. |
| PSI# | Processor low-power mode signal | Active-low input triggering phase reduction (1- or 2-phase) with diode emulation; restores full phases on de-assertion. |
| VDIFF / VSEN / RGND | Differential remote-sense interface | VSEN–RGND measures remote output voltage drop; VDIFF is amplified single-ended output used for regulation and protection. |
| OFS / TCOMP / TM | Offset and thermal compensation controls | OFS sets REF–DAC offset; TM reads NTC voltage; TCOMP scales thermal gain for OCP/droop compensation. |
Key Features
| Feature | Design Value |
|---|---|
| VR11.1 Compliance | Full support for Dynamic VID™, 8-bit VID encoding, IMON reporting, and VR_RDY/VR_HOT/VR_FAN signaling per Intel spec. |
| Active Phase Management | Hardware-controlled phase adding/dropping with diode emulation during PSI# mode; reduces magnetic and switching losses at light load. |
| Differential Remote Sensing | VSEN/RGND/VDIFF path eliminates ground potential error; improves regulation accuracy and overvoltage/undervoltage protection fidelity. |
| Precision Droop Control | FB pin sinks current proportional to sensed load; combined with ISEN inputs, enables programmable load-line slope without external op-amps. |
| Integrated Thermal Compensation | TM/TCOMP interface digitizes NTC voltage and scales OCP threshold and droop coefficient to match inductor DCR drift over temperature. |
Applications
| Server CPU Voltage Regulator | Desktop Core VRM |
|---|---|
Use Scenario: High-current, multi-core Xeon or EPYC processors requiring sub-100 ns transient response and <±5 mV regulation accuracy across 0–200 A load range. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller coordinating gate drivers (e.g., ISL6622), managing PSI#-driven phase scaling, and delivering IMON telemetry to CPU. Use Value: Enables fewer output capacitors and smaller inductors via interleaved ripple cancellation; maintains >90% efficiency from 5% to full load using diode emulation. |
Use Scenario: Mainboard VRM for Intel 11th–13th Gen Core i5/i7/i9 CPUs with dynamic VID changes and thermal throttling requirements. IC Role / Device Role / Timing Role: Core voltage controller implementing VR11.1 droop profile, remote sensing, and coordinated startup with VTT regulator via EN_VTT. Use Value: Achieves ±0.5% closed-loop accuracy over temperature; integrates thermal compensation to maintain OCP trip point stability across -10°C to +95°C VRM ambient. |
| Workstation GPU Power Delivery | High-Performance AI Accelerator VRM |
Use Scenario: Dual-GPU or high-TDP discrete graphics cards needing scalable phase count and robust overcurrent protection during burst workloads. IC Role / Device Role / Timing Role: Multiphase controller driving ISL6614 quad drivers; uses IMON and VR_HOT to trigger fan speed and thermal throttling in real time. Use Value: Supports coupled-inductor topologies via APA modulation; delivers consistent transient response regardless of active phase count (1–4). |
Use Scenario: PCIe-based AI accelerators (e.g., NVIDIA A100 derivatives) requiring tightly regulated 0.7–1.0 V core rails with telemetry for power management firmware. IC Role / Device Role / Timing Role: Precision voltage controller providing IMON feedback to host BMC, VR_RDY handshake with FPGA boot sequence, and PSI#-synchronized low-power states. Use Value: Enables firmware-controlled dynamic voltage scaling via Dynamic VID™; integrated open-sense-line protection prevents false OCP during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6334AIRZR5368 | Wider operating temperature range (–40°C to +85°C) vs. ISL6334ACRZR5368 (0°C to +70°C); identical electrical specs and pinout. | Suitable for industrial or extended-temperature server environments where ambient exceeds 70°C. | Select ISL6334AIRZR5368 when board-level thermal design cannot guarantee junction temperature stays within 0°C–70°C envelope. |
| RT8803AGQW | Single-chip 4+1-phase controller with integrated MOSFET drivers; lacks IMON reporting, VR11.1 compliance, and PSI#-based phase dropping. | Targeted at cost-sensitive consumer motherboards without CPU telemetry or strict VR11.1 requirements. | Choose RT8803AGQW only if VR11.1 compliance, IMON telemetry, and diode-emulation efficiency are not required. |
Compared with ISL6334ACRZR5368, ISL6334AIRZR5368 offers identical functionality with extended temperature rating, while RT8803AGQW trades VR11.1 fidelity and telemetry for integration and lower BOM count - making ISL6334ACRZR5368 the sole choice for Intel-compliant, telemetry-enabled server/desktop VRMs.
Availability
ISL6334ACRZR5368 is available at Aetrix Electronics and suitable for server CPU voltage regulators, desktop core VRMs, workstation GPU power delivery, and high-performance AI accelerator VRMs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL6334ACRZR5368 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 and maintains its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and datacenter applications.
The ISL6334ACRZR5368 belongs to Renesas' VR11.x multiphase controller product line, designed specifically for Intel microprocessor core voltage regulation with emphasis on transient response, light-load efficiency, and telemetry-driven power management.
FAQ
What is the operating temperature range for the ISL6334ACRZR5368?
The ISL6334ACRZR5368 is rated for an ambient operating temperature range of 0°C to +70°C. This is specified in the Absolute Maximum Ratings table on page 8 of FN6839 Rev 2.00. Junction temperature must not exceed +150°C, and thermal design must ensure θJA = 32°C/W is respected under actual board conditions. The ISL6334ACRZR5368 shares all electrical specifications with the ISL6334AIRZR5368 except for this temperature grade.
How does the ISL6334ACRZR5368 implement diode emulation during PSI# mode?
When PSI# is asserted low, the ISL6334ACRZR5368 disables selected PWM outputs and configures remaining active phases to operate in discontinuous conduction mode (DCM) with adaptive timing-emulating synchronous rectifier body-diode conduction. This reduces switching and core losses at light load. The ISL6334ACRZR5368 achieves this via its proprietary APP/APA modulation engine and internal phase-dropping logic decoded from PSI#, FS, and SS pins.
Can the ISL6334ACRZR5368 support DCR current sensing without external op-amps?
Yes. The ISL6334ACRZR5368 integrates fully differential current sense amplifiers on each ISEN± pair, supporting direct DCR sensing with no external op-amps required. The sensed current flows out of the FB pin to develop the droop voltage across an external resistor, enabling precise load-line programming. Page 12 of FN6839 confirms DCR sensing configuration and capacitor compensation requirements for ISEN+ pins.
What is the function of the IMON pin on the ISL6334ACRZR5368?
The IMON pin on the ISL6334ACRZR5368 outputs a voltage proportional to the thermally compensated average load current, clamped at 1.11 V. It serves two critical functions: (1) providing real-time current telemetry to the microprocessor for power management, and (2) acting as the primary input for precision overcurrent protection. If IMON reaches 1.11 V, the ISL6334ACRZR5368 initiates immediate shutdown.
Which driver ICs are recommended for use with the ISL6334ACRZR5368?
Renesas recommends ISL6622 (dual-channel, 12 V, with diode emulation and GVOT), ISL6612 (dual-channel, 12 V, no DE), and ISL6614 (quad-channel, 12 V) for use with the ISL6334ACRZR5368. Table on page 3 of FN6839 specifies compatibility per phase-count and topology (e.g., coupled vs. uncoupled inductors). All listed drivers are pin-compatible within their families and support the ISL6334ACRZR5368's PSI#-coordinated phase activation.
ISL6334ACRZR5368 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- 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)
ISL6334ACRZR5368 FAQ
1.How can I place an order for ISL6334ACRZR5368 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6334ACRZR5368 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 ISL6334ACRZR5368 reliable?
The price and inventory of ISL6334ACRZR5368 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6334ACRZR5368 is usually 5 days.
3.What payment methods are accepted for ISL6334ACRZR5368?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6334ACRZR5368 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6334ACRZR5368?
ISL6334ACRZR5368 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6334ACRZR5368 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 ISL6334ACRZR5368?
For technical support, including ISL6334ACRZR5368 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6334ACRZR5368 requirements.
6.How does Aetrix verify that ISL6334ACRZR5368 is sourced from the original manufacturer or authorized distributors?
All ISL6334ACRZR5368 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 ISL6334ACRZR5368 meets industry standards.
7.What is the process for return or replacement of ISL6334ACRZR5368?
All ISL6334ACRZR5368 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6334ACRZR5368, 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 ISL6334ACRZR5368 part is unused and in its original packaging.
Return procedure for ISL6334ACRZR5368:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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