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Renesas ISL62881CIRTZ-T
- Part No.:
- ISL62881CIRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
ISL62881CIRTZ-T.pdf
- Description:
- IC REG CTRL IMVP-6.5 1OUT 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
ISL62881CIRTZ-T from Renesas Electronics (formerly Intersil) is a single-phase PWM voltage regulator IC designed for IMVP-6.5™-compliant mobile CPU and GPU core 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, enables diode emulation mode, and operates with 200–500 kHz adjustable switching frequency in notebook VR applications.
For engineers reviewing the ISL62881CIRTZ-T datasheet, ISL62881CIRTZ-T pinout, ISL62881CIRTZ-T application, or ISL62881CIRTZ-T equivalent, key selection criteria include its –40°C to +100°C industrial temperature range, 28-pin 4×4 mm TQFN package, IMVP-6.5™ protocol compliance, differential remote voltage sensing capability, and adaptive body diode conduction time reduction for light-load efficiency.
Technical Context
The ISL62881CIRTZ-T implements Intersil's Robust Ripple Regulator (R3™) modulator architecture, combining fixed-frequency PWM stability with hysteretic-like transient response. It uses a master-slave ripple capacitor system (VCRM/VCRS) referenced to COMP and VW pins to generate variable-frequency PWM pulses during load transients-increasing frequency under load step-up and stretching period under light load.
It supports dual current-sensing methods (inductor DCR or discrete resistor), provides differential remote sensing via VSEN/RTN pins, reports output current via IMON analog output, and enters diode emulation mode upon DPRSLPVR assertion to minimize reverse conduction loss-enabled by adaptive timing control of LGATE turn-off based on phase-node voltage zero-crossing detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | Fully compliant with Intel IMVP-6.5™ specification for mobile CPU/GPU core VRs |
| Output Voltage Range | 0.70 V to 1.50 V (set via 7-bit VID bus); ±0.8% system accuracy over –40°C to +100°C |
| Switching Frequency | 200–500 kHz adjustable via VW-to-COMP resistor; nominal 300 kHz at RFSET = 7 kΩ |
| Current Sensing | Supports lossless DCR sensing or precision resistor sensing; ISUM+/ISUM− inputs for droop implementation |
| Thermal Range | –40°C to +100°C ambient; junction rated to +125°C; qualified for industrial-grade reliability |
| Package | 28-lead 4×4 mm TQFN (L28.4x4), exposed GND pad for thermal dissipation |
| Gate Drive Capability | UGATE: 2.0 A source/sink; LGATE: 4.0 A sink / 2.0 A source; deadtime <30 ns |
Pinout & Package
ISL62881CIRTZ-T is housed in a 28-lead, 4 mm × 4 mm, 0.5 mm pitch TQFN package (PKG DWG L28.4x4) with an exposed thermal pad electrically connected to GND. The bottom pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital voltage identification input | Set target output voltage per IMVP-6.5™ VID table; VID0 = LSB, VID6 = MSB |
| VR_ON | Enable input | Active-high logic signal; ≥0.75 V threshold required to initiate soft-start and regulation |
| DPRSLPVR | Deeper sleep mode indicator | High-level assertion triggers diode emulation mode and adaptive body diode conduction control |
| VSEN / RTN | Differential remote sense pair | VSEN connects to CPU/GPU die; RTN connects to die ground-enables precise die-voltage regulation |
| ISUM+ / ISUM− | Current-sense summing inputs | Accept summed voltage from DCR network or sense resistor; feed droop amplifier for load-line implementation |
| IMON | Analog current monitor output | Current-source output proportional to output current (e.g., 120 µA at 20 µA ISUM−) |
| UGATE / LGATE | High-side / low-side MOSFET gate drivers | Integrated drivers support external N-channel FETs; UGATE drives high-side; LGATE drives low-side |
| PHASE / BOOT / VSSP / VCCP | Power stage interface terminals | PHASE = switch node; BOOT = high-side bootstrap supply; VSSP = low-side return; VCCP = gate driver bias |
| PGOOD / CLK_EN# | Open-drain status outputs | PGOOD asserts when output is within regulation; CLK_EN# signals PLL clock enable after stable VCORE |
| RBIAS | Application configuration resistor | 147 kΩ selects CPU mode; 47 kΩ selects GPU mode-sets internal current reference and compensation |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Enables faster transient settling vs. fixed-frequency PWM and improved light-load efficiency vs. hysteretic controllers via variable-frequency operation |
| Adaptive Body Diode Conduction Time Reduction | Monitors PHASE node voltage to turn off LGATE precisely at zero-current crossing-eliminates reverse conduction loss in diode emulation mode |
| User-Selectable Overshoot Reduction | Configurable function that limits output voltage overshoot during load transients-reduces need for bulk output capacitance |
| Differential Remote Voltage Sensing | VSEN/RTN pair compensates for IR drop across PCB traces-ensures accurate voltage regulation at processor die |
| IMVP-6.5™ Protocol Compliance | Full support for VID programming, DPRSLPVR signaling, IMON reporting, and thermal throttling readiness (via VR_TT# in ISL62881D only) |
Applications
| Notebook CPU Core VR | Notebook GPU Core VR |
|---|---|
Use Scenario: Power delivery for Intel Core i-series or AMD Ryzen mobile CPUs requiring dynamic VID adjustment and deep sleep state support. IC Role / Device Role / Timing Role: Primary single-phase PWM controller implementing IMVP-6.5™; manages gate drive, current sensing, load-line droop, and diode emulation. Use Value: Enables >90% efficiency at light loads via adaptive body diode control and maintains ±0.8% voltage accuracy across –40°C to +100°C operating range. | Use Scenario: Core voltage regulation for NVIDIA GeForce or AMD Radeon mobile GPUs with aggressive power-state transitions. IC Role / Device Role / Timing Role: Single-phase VR controller configured via RBIAS = 47 kΩ; supports GPU-specific soft-start ramp (5 mV/µs) and VID-based voltage scaling. Use Value: Delivers fast transient response using R3™ modulator and differential sensing-critical for GPU burst workloads and frame-rate stability. |
| Mobile Thin-and-Light Platform VR | Embedded Mobile Workstation VR |
Use Scenario: Space-constrained ultrabook designs requiring minimal output capacitance and high thermal resilience. IC Role / Device Role / Timing Role: Compact 4×4 mm TQFN VR controller enabling small form factor; supports overshoot reduction to cut bulk cap count by up to 30%. Use Value: Reduces BOM cost and board area while maintaining IMVP-6.5™ compliance and robust thermal performance up to +100°C ambient. | Use Scenario: Ruggedized mobile workstations used in field engineering or medical imaging with extended temperature requirements. IC Role / Device Role / Timing Role: Industrial-grade VR controller rated for –40°C to +100°C ambient; integrated thermal compensation for DCR current sensing via NTC (in ISL62881D variant). Use Value: Ensures reliable core voltage regulation across wide thermal gradients without external calibration-critical for mission-critical embedded use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase IMVP-6.5™ voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62881CHRTZ-T | Same silicon; rated for –10°C to +100°C ambient (vs. –40°C to +100°C for IRTZ) | Not suitable for extended industrial or automotive-adjacent environments requiring –40°C startup | Select ISL62881CIRTZ-T when full industrial temperature range is mandatory; HRTZ suffices for commercial notebooks. |
| RTQ2131BGQW-T | Single-phase IMVP-6.5™ controller from Richtek; supports 0.3–1.5 V output, 300–600 kHz fSW, but lacks R3™ modulator and adaptive body diode control | Requires external compensation and offers slower transient response; no integrated IMON or differential sensing | Choose RTQ2131BGQW-T only if cost sensitivity outweighs need for R3™-enhanced efficiency and precision die-voltage regulation. |
Compared with ISL62881CHRTZ-T, the ISL62881CIRTZ-T extends cold-temperature operation to –40°C while retaining identical functionality and pinout; versus RTQ2131BGQW-T, it delivers superior transient performance, integrated current monitoring, and true IMVP-6.5™ feature completeness-including diode emulation and VID-programmable load line.
Availability
ISL62881CIRTZ-T is available at Aetrix Electronics and suitable for notebook CPU core VR, notebook GPU core VR, and mobile thin-and-light platform power applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade performance.
Supply support for ISL62881CIRTZ-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 Corporation acquired Intersil in 2017 and continues to manufacture and support its high-performance analog and power management portfolio.
The ISL62881CIRTZ-T belongs to Renesas' mobile voltage regulator product line, engineered specifically for Intel IMVP-6.5™-compliant CPU and GPU core power delivery in space- and thermally-constrained portable platforms.
FAQ
What is the operating temperature range of the ISL62881CIRTZ-T?
The ISL62881CIRTZ-T is rated for –40°C to +100°C ambient temperature operation, with maximum junction temperature of +125°C. This industrial-grade rating distinguishes it from the ISL62881CHRTZ-T (–10°C to +100°C) and ensures reliable startup and regulation in extended environmental conditions typical of ruggedized mobile platforms.
Does the ISL62881CIRTZ-T support differential remote voltage sensing?
Yes, the ISL62881CIRTZ-T supports differential remote voltage sensing via dedicated VSEN and RTN pins. VSEN connects directly to the processor die voltage node, and RTN connects to the die ground reference point-enabling accurate closed-loop regulation at the point of load and compensating for PCB trace IR drop.
How does the ISL62881CIRTZ-T implement diode emulation mode?
The ISL62881CIRTZ-T enters diode emulation mode upon assertion of the DPRSLPVR signal. It monitors the PHASE node voltage and turns off LGATE precisely when current reaches zero-preventing reverse conduction through the low-side MOSFET body diode. This adaptive timing reduces conduction loss and improves light-load efficiency without external circuitry.
What current sensing methods does the ISL62881CIRTZ-T support?
The ISL62881CIRTZ-T supports two validated current sensing methods: (1) lossless inductor DCR sensing using ISUM+/ISUM− inputs and an RC network, and (2) discrete resistor sensing with precision shunt placement. Both methods feed the droop amplifier to implement IMVP-6.5™-compliant load-line regulation and enable accurate IMON current reporting.
Is the ISL62881CIRTZ-T pin-compatible with the ISL62881D series?
No, the ISL62881CIRTZ-T is not pin-compatible with the ISL62881D series. The ISL62881C uses a 28-pin 4×4 mm TQFN package, while the ISL62881D uses a 32-pin 5×5 mm TQFN package (L32.5x5E) and adds VR_TT# and NTC pins. Pin counts, layout, and footprint differ-requiring separate PCB designs for each variant.
ISL62881CIRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL62881CIRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62881CIRTZ-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 ISL62881CIRTZ-T reliable?
The price and inventory of ISL62881CIRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62881CIRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL62881CIRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62881CIRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62881CIRTZ-T?
ISL62881CIRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62881CIRTZ-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 ISL62881CIRTZ-T?
For technical support, including ISL62881CIRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62881CIRTZ-T requirements.
6.How does Aetrix verify that ISL62881CIRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL62881CIRTZ-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 ISL62881CIRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL62881CIRTZ-T?
All ISL62881CIRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL62881CIRTZ-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 ISL62881CIRTZ-T part is unused and in its original packaging.
Return procedure for ISL62881CIRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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