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Renesas ISL62881CIRTZ
- Part No.:
- ISL62881CIRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
ISL62881CIRTZ.pdf
- Description:
- IC REG CTRL IMVP-6.5 1OUT 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,358
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Product details
Overview
ISL62881CIRTZ from Renesas (formerly Intersil) is a single-phase PWM core voltage regulator IC designed for IMVP-6.5™-compliant mobile CPU and GPU power delivery. It integrates high- and low-side gate drivers, supports DCR/resistor current sensing, delivers ±0.8% system accuracy over –40°C to +100°C, features R3™ modulator architecture for fast transient response, and operates with 200–500 kHz adjustable switching frequency in notebook VR applications.
For engineers reviewing the ISL62881CIRTZ datasheet, ISL62881CIRTZ pinout, ISL62881CIRTZ application, or ISL62881CIRTZ equivalent, key selection considerations include its –40°C to +125°C junction temperature rating, 28-pin 4×4 mm TQFN package, differential remote voltage sensing capability, adaptive body diode conduction time reduction, and IMON current monitor output for real-time load reporting.
Technical Context
The ISL62881CIRTZ implements Intersil's patented Robust Ripple Regulator (R3™) topology, combining fixed-frequency PWM stability with hysteretic-like transient responsiveness. Its master-slave ripple capacitor architecture enables variable switching frequency during load transients while maintaining tight DC regulation via an error amplifier with 90 dB DC gain and 18 MHz GBW.
It supports dual current-sensing methods-lossless inductor DCR sensing and precision resistor-based sensing-and includes DPRSLPVR-triggered diode emulation mode with adaptive body diode conduction time control to minimize reverse conduction loss during light-load operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | Fully compliant with Intel IMVP-6.5™ protocol for CPU/GPU core voltage control |
| Output Voltage Range | 0.70 V to 1.50 V (7-bit VID programmable, 12.5 mV step) |
| System Accuracy | ±0.8% over –40°C to +100°C ambient, including line/load/temperature effects |
| Switching Frequency | 200–500 kHz user-adjustable via VW pin resistor; nominal 300 kHz at RFSET = 7 kΩ |
| Junction Temp Range | –40°C to +125°C - validated for extended industrial-grade thermal operation |
| Current Sensing | Supports both DCR-based (inductor) and discrete resistor-based sensing with differential ISUM+/ISUM– inputs |
| Gate Drive Capability | UGATE: 2.0 A source/sink; LGATE: 4.0 A sink / 2.0 A source; deadtimes <30 ns |
Pinout & Package
ISL62881CIRTZ is housed in a thermally enhanced 28-lead 4×4 mm TQFN package (L28.4x4) with exposed GND pad on bottom for PCB heat dissipation. Pinout matches ISL62881C variant per FN7596 Rev 0.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | Digital voltage identification inputs | 7-bit bus (VID0 LSB) sets target VOUT per IMVP-6.5™ VID table; supports 0.70–1.50 V in 12.5 mV steps |
| VR_ON | Enable input | Active-high logic signal (VIH ≥ 0.75 V) initiates soft-start and regulator operation |
| DPRSLPVR | Deeper sleep mode control | Triggers diode emulation mode and adaptive body diode timing when asserted high |
| VSEN / RTN | Differential remote sense pair | Connects directly to processor die for accurate closed-loop voltage regulation at point-of-load |
| ISUM+ / ISUM− | Droop current sense inputs | Accept summed current signal from DCR network or sense resistor for load-line implementation |
| IMON | Analog current monitor output | Current-source output proportional to output current (e.g., 120 µA at 20 µA ISUM− input) |
| UGATE / LGATE | High-/low-side MOSFET gate drivers | Integrated drivers support external N-channel FETs; UGATE drives high-side, LGATE drives low-side |
| PHASE / BOOT / VSSP | Power stage interface nodes | PHASE connects to HS-FET source/LS-FET drain/inductor node; BOOT supplies HS driver; VSSP is LS driver return |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Enables simultaneous fast transient response (<10 µs settling), variable frequency under load change, and ±0.8% DC accuracy via integrated error amplifier |
| Adaptive Body Diode Conduction Time Reduction | Monitors PHASE node voltage to turn off LGATE precisely at zero-current crossing, eliminating reverse conduction loss in diode emulation mode |
| User-Selectable Overshoot Reduction | Configurable function that limits output voltage overshoot during load-step transients, reducing need for bulk capacitance |
| Differential Remote Voltage Sensing | VSEN/RTN pair compensates for IR drop across PCB traces, ensuring ±0.8% regulation accuracy at microprocessor die |
| IMON Current Monitor Output | Provides analog current-proportional output (e.g., 60 µA per 10 µA ISUM−) for system-level telemetry and thermal management |
Applications
| Notebook CPU Core VR | Notebook GPU Core VR |
|---|---|
Use Scenario: Power delivery to Intel Core i-series or AMD Ryzen mobile CPUs requiring dynamic VID updates and aggressive load-step response. IC Role / Device Role / Timing Role: Primary single-phase PWM controller implementing IMVP-6.5™ protocol with R3™ modulation, differential sensing, and DPRSLPVR-triggered diode emulation. Use Value: Enables stable 0.7–1.5 V core supply with ±0.8% accuracy across –40°C to +100°C, reducing output capacitance by up to 30% via overshoot reduction function. | Use Scenario: Core voltage regulation for NVIDIA GeForce or AMD Radeon mobile GPUs with rapid VID transitions and light-load efficiency demands. IC Role / Device Role / Timing Role: Single-phase VR controller configured for GPU mode via RBIAS resistor; supports 5 mV/µs DAC slew rate and deep CCM-to-DCM transition. Use Value: Achieves >90% efficiency at 1 A load via adaptive body diode control and period stretching, extending battery runtime in thin-and-light notebooks. |
| Mobile Thin-and-Light Platform | Embedded Mobile Workstation |
Use Scenario: Space-constrained ultrabook designs requiring minimal footprint and thermal headroom for dual-core CPU + integrated GPU. IC Role / Device Role / Timing Role: Compact 4×4 mm TQFN regulator with integrated gate drivers eliminates need for external drivers and reduces BOM count by ≥4 components. Use Value: 28-pin TQFN package saves >40% board area vs. legacy SOIC solutions while supporting full IMVP-6.5™ compliance and thermal throttling readiness. | Use Scenario: High-performance mobile workstations running CAD, simulation, or AI inference with sustained multi-amp core loads. IC Role / Device Role / Timing Role: Precision load-line regulator using DCR current sensing and differential remote sensing to maintain voltage within ±5 mV of setpoint under 20 A dynamic load steps. Use Value: Delivers 0.5% load-line accuracy and <15 µs transient recovery, preventing CPU/GPU throttling during burst workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase IMVP-6.5™ core voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62881CHRTZ | Same silicon, but rated for –10°C to +100°C ambient and +125°C junction; uses identical 28-pin 4×4 mm TQFN package | Not qualified for extended industrial temperature range; unsuitable for automotive or harsh-environment deployments | Select ISL62881CIRTZ when operating below –10°C or above +100°C ambient is required. |
| ISL62881DHRTZ | Includes VR_TT# thermal throttling output and split LGATEa/LGATEb drivers; uses larger 32-pin 5×5 mm TQFN package | Supports hardware thermal throttling via NTC input and improves light-load efficiency further via dual LGATE control | Choose ISL62881DHRTZ only if VR_TT# signaling or enhanced sub-1-A efficiency is mandatory; not pin-compatible. |
Compared with ISL62881CHRTZ, ISL62881CIRTZ extends operational ambient range by 30°C downward while retaining identical electrical performance and pinout; versus ISL62881DHRTZ, it omits VR_TT# and split LGATE but maintains smaller footprint and lower system cost for standard CPU/GPU VR use cases.
Availability
ISL62881CIRTZ is available at Aetrix Electronics and suitable for notebook CPU core VR, notebook GPU core VR, and embedded mobile workstation applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL62881CIRTZ 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 to manufacture and support its high-performance analog and power management portfolio.
The ISL62881CIRTZ belongs to Renesas' IMVP-6.5™-compliant single-phase VR controller product line, engineered specifically for energy-efficient, high-accuracy core voltage regulation in space-constrained mobile computing platforms.
FAQ
What is the maximum junction temperature specification for ISL62881CIRTZ?
The ISL62881CIRTZ is rated for a maximum junction temperature of +125°C, validated over the full –40°C to +100°C ambient operating range. This rating is explicitly confirmed in the "Recommended Operating Conditions" table of FN7596 Rev 0.00, distinguishing it from the ISL62881CHRTZ variant which shares the same +125°C limit but only supports –10°C minimum ambient.
Does ISL62881CIRTZ support differential remote voltage sensing?
Yes, ISL62881CIRTZ supports differential remote voltage sensing via dedicated VSEN and RTN pins. As documented in the "Pin Function Description" and "Voltage Regulation and Load Line Implementation" sections of FN7596 Rev 0.00, this feature enables precise closed-loop regulation at the microprocessor die by compensating for PCB trace IR drop, contributing directly to its ±0.8% system accuracy specification.
How does the R3™ modulator in ISL62881CIRTZ improve transient response compared to traditional PWM controllers?
The R3™ modulator in ISL62881CIRTZ improves transient response by dynamically adjusting switching frequency during load steps: COMP voltage rise accelerates clock generation, increasing effective frequency and control loop bandwidth. This architecture achieves faster settling time than fixed-frequency PWM while retaining DC accuracy via the integrated error amplifier - a capability verified in Figure 7 and "Theory of Operation" section of FN7596 Rev 0.00.
Can ISL62881CIRTZ be used for GPU core voltage regulation, and what configuration is required?
Yes, ISL62881CIRTZ can be configured for GPU core VR by setting RBIAS to 47 kΩ (vs. 147 kΩ for CPU mode), enabling 5 mV/µs DAC slew rate and optimized startup timing per Figure 11 of FN7596 Rev 0.00. The same IC supports both CPU and GPU applications via external resistor selection, with identical electrical performance and pin compatibility across modes.
What current sensing methods does ISL62881CIRTZ support, and how are they implemented?
ISL62881CIRTZ supports two current sensing methods: lossless inductor DCR sensing (using ISUM+/ISUM− inputs with RC network) and precision discrete resistor sensing (same pins, different network). Both feed the droop amplifier for load-line implementation, as shown in Figures 1 and 2 of FN7596 Rev 0.00. Selection is determined by external passive component values - no internal configuration bits are required.
ISL62881CIRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel IMVP-6.5™
- Voltage - Input:
- 4.5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.013V ~ 1.5V
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
ISL62881CIRTZ FAQ
1.How can I place an order for ISL62881CIRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62881CIRTZ 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 ISL62881CIRTZ reliable?
The price and inventory of ISL62881CIRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62881CIRTZ is usually 5 days.
3.What payment methods are accepted for ISL62881CIRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62881CIRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62881CIRTZ?
ISL62881CIRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62881CIRTZ 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 ISL62881CIRTZ?
For technical support, including ISL62881CIRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62881CIRTZ requirements.
6.How does Aetrix verify that ISL62881CIRTZ is sourced from the original manufacturer or authorized distributors?
All ISL62881CIRTZ 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 ISL62881CIRTZ meets industry standards.
7.What is the process for return or replacement of ISL62881CIRTZ?
All ISL62881CIRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL62881CIRTZ, 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 ISL62881CIRTZ part is unused and in its original packaging.
Return procedure for ISL62881CIRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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