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Renesas ISL62881HRTZ
- Part No.:
- ISL62881HRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
ISL62881HRTZ.pdf
- Description:
- IC REG CTRL IMVP-6.5 1OUT 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,158
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Product details
Overview
ISL62881HRTZ from Intersil is a single-phase PWM buck regulator IC designed for IMVP-6.5™-compliant core power delivery to mobile CPUs and GPUs. It integrates high- and low-side gate drivers, employs Robust Ripple Regulator (R3™) modulator technology, delivers 0.5% system voltage accuracy over temperature, supports 7-bit VID input (0V–1.500V in 12.5mV steps), and uses differential remote sensing for precise die-level regulation in notebook computers.
For engineers reviewing the ISL62881HRTZ datasheet, ISL62881HRTZ pinout, ISL62881HRTZ application, or ISL62881HRTZ equivalent, key selection considerations include its R3™ transient response, IMVP-6.5™ compliance, DCR/resistor current sensing flexibility, diode emulation mode for light-load efficiency, and 28-pin 4×4 TQFN package with exposed thermal pad.
Technical Context
The ISL62881HRTZ implements Intel's IMVP-6.5™ protocol using Intersil's patented R3™ modulator, which dynamically adjusts switching frequency during load transients to achieve faster response than fixed-frequency PWM controllers. Its master-slave ripple capacitor architecture generates noise-immune control signals while retaining error amplifier-based precision.
It supports dual configuration modes-CPU VR (RBIAS = 147kΩ) and GPU VR (RBIAS = 47kΩ)-with DPRSLPVR-controlled diode emulation, adaptive body diode conduction time reduction, and user-selectable overshoot reduction. Current sensing is implemented via lossless inductor DCR or discrete resistor, thermally compensated using a single NTC thermistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Single-phase synchronous buck regulator with integrated UGATE/LGATE drivers |
| Input Voltage Range | VIN = +4.5V to +25V; supports battery-fed mobile platforms |
| Output Voltage Range | 0V to 1.500V via 7-bit VID; 12.5mV step resolution per VID code |
| System Accuracy | ±0.5% over –10°C to +100°C ambient; enables tight core voltage tolerance |
| Switching Frequency | Adjustable 200–500kHz; nominal 300kHz at VW = 8kΩ; variable under transient load |
| Current Sensing | Supports both inductor DCR and discrete resistor methods; NTC compensation enabled |
| Thermal Range | –10°C to +100°C ambient; junction rated to +125°C |
| Package | 28-lead 4×4 mm TQFN with exposed GND pad; θJA = 40°C/W, θJC = 3°C/W |
Pinout & Package
ISL62881HRTZ is housed in a 28-lead, 4×4 mm, 0.5 mm pitch TQFN package (PKG DWG L28.4x4) with an exposed thermal pad on the bottom for enhanced heat dissipation. Pin functions are validated per FN6924 Rev 3.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | Voltage identification inputs | 7-bit digital interface setting output voltage per IMVP-6.5™ table; LSB = VID0, MSB = VID6 |
| UGATE | High-side MOSFET gate driver output | Drives high-side FET gate; 2A source/sink capability; BOOT-referenced |
| LGATE | Low-side MOSFET gate driver output | Drives low-side FET gate; 4A sink capability; VSSP-referenced |
| PHASE | Switch node connection | Connects to high-side source/low-side drain/inductor node; critical for bootstrap operation |
| BOOT | Bootstrap capacitor connection | Connects MLCC between BOOT and PHASE; charges internal boot diode from VCCP |
| FB | Inverting input of error amplifier | Used with droop network (Rdroop) to implement load line; referenced to RTN |
| VSEN / RTN | Differential remote sense inputs | VSEN connects to processor die VCC; RTN connects to die ground; enables die-level regulation |
| IMON | Analog current monitor output | Current-source output proportional to output current (e.g., 120µA at 20µA ISUM-) |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Combines hysteretic speed and PWM precision; achieves faster transient response without sacrificing DC accuracy |
| Diode Emulation Mode | Disables reverse inductor current flow at light loads; reduces conduction loss and improves efficiency in DCM |
| Adaptive Body Diode Reduction | Minimizes low-side FET body diode conduction time in DE mode; lowers thermal stress and losses |
| User-selectable Overshoot Reduction | Allows aggressive capacitor reduction or full disable-enables trade-off between BOM cost and thermal margin |
| Differential Remote Sensing | Compensates for PCB IR drop; regulates voltage directly at processor die for ±0.5% accuracy |
| IMVP-6.5™ Compliance | Fully satisfies Intel's mobile CPU/GPU core power specification including VR_ON, DPRSLPVR, PGOOD, and CLK_EN# timing |
Applications
| Mobile CPU Core Power | Mobile GPU Core Power |
|---|---|
Use Scenario: Power delivery to Intel Core i-series or AMD Ryzen Mobile processors in ultrabooks and thin-and-light notebooks. IC Role / Device Role / Timing Role: Single-phase IMVP-6.5™ VR controller regulating core voltage (0.7–1.5V) with dynamic VID updates and load-line droop. Use Value: Enables fast transient response to CPU DVFS events while maintaining ±0.5% voltage accuracy at the die under varying thermal conditions. | Use Scenario: Core power supply for NVIDIA GeForce MX or AMD Radeon Vega graphics in compact mobile workstations. IC Role / Device Role / Timing Role: GPU VR controller supporting audio-filtering mode and DPRSLPVR-slewed Vcore ramp (5/10 mV/µs). Use Value: Reduces EMI in graphics subsystems and ensures stable GPU operation during burst rendering workloads. |
| Notebook System Power Sequencing | IMVP-6.5™ Reference Design Platform |
Use Scenario: Integration into OEM reference designs requiring strict Intel VR compliance, including PGOOD assertion timing and CLK_EN# enable delay. IC Role / Device Role / Timing Role: Primary voltage regulator generating synchronized clock-enable signal after 13 stable switching cycles (≈43 µs at 300 kHz). Use Value: Guarantees reliable system boot by meeting IMVP-6.5™ timing windows for PLL enable and power-good assertion (~7 ms). | Use Scenario: Used in Intel-validated reference boards for platform validation, BIOS development, and VR firmware testing. IC Role / Device Role / Timing Role: Compliant IMVP-6.5™ controller supporting both DCR and resistor current sensing, NTC thermal compensation, and droop tuning. Use Value: Accelerates platform bring-up by providing production-ready, spec-compliant power architecture with documented layout guidelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase IMVP-6.5™ VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL62881BHRTZ | 32-pin 5×5 TQFN; adds VR_TT# thermal throttling output and split LGATEa/LGATEb drivers | Required for systems needing hardware thermal throttling signaling and deeper sleep-mode efficiency optimization | Select ISL62881BHRTZ only if VR_TT# or dual-LGATE functionality is explicitly required; not pin-compatible |
| RT8802CGQW | Single-phase IMVP-6.5™ controller in 32-pin QFN; supports 0.3–1.5V output, 300–600kHz fSW, but lacks R3™ modulator and NTC compensation | Suitable for cost-sensitive designs where R3™ transient performance and thermal drift compensation are non-critical | RT8802CGQW offers higher max fSW but trades off transient response and temperature-stable load line vs. ISL62881HRTZ |
Compared with ISL62881BHRTZ, ISL62881HRTZ provides identical IMVP-6.5™ compliance and R3™ performance in a smaller 28-pin footprint but omits thermal throttling and split-gate features; versus RT8802CGQW, it delivers superior transient immunity and temperature-compensated current sensing at the expense of slightly lower max switching frequency.
Availability
ISL62881HRTZ is available at Aetrix Electronics and suitable for notebook computer power design, mobile CPU/GPU voltage regulation, and IMVP-6.5™ reference platform development requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL62881HRTZ 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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, communications, and industrial applications.
The ISL62881 product line was engineered specifically for Intel IMVP-6.5™ mobile processor core power delivery, emphasizing precision regulation, fast transient response, and thermal-aware current sensing in space-constrained notebook platforms.
FAQ
What is the primary function of the ISL62881HRTZ in a notebook power system?
The ISL62881HRTZ serves as a single-phase IMVP-6.5™-compliant voltage regulator controller for mobile CPU or GPU core power. It drives external high- and low-side MOSFETs, regulates output voltage via 7-bit VID input, implements load-line droop, and provides differential remote sensing to maintain ±0.5% accuracy at the processor die. Its R3™ modulator ensures rapid transient response essential for modern mobile processors.
Does the ISL62881HRTZ support both DCR and resistor-based current sensing?
Yes, the ISL62881HRTZ supports both inductor DCR and discrete resistor current sensing methods. When using DCR sensing, a single NTC thermistor compensates for copper winding resistance drift over temperature, preserving load-line accuracy. Resistor sensing uses a series sense resistor and associated RC network (RSUM, CIS). Both configurations are validated in Figures 1–2 of the FN6924 datasheet.
How does the ISL62881HRTZ enter and operate in diode emulation mode?
The ISL62881HRTZ enters diode emulation mode when a logic-high signal is applied to the DPRSLPVR pin. In this mode, the LGATE driver turns off the low-side MOSFET when the PHASE node voltage reaches zero, preventing reverse inductor current flow. This emulates a diode's unidirectional conduction, reducing switching and conduction losses at light loads and improving efficiency in discontinuous conduction mode (DCM).
What is the role of the RBIAS pin on the ISL62881HRTZ, and how is it configured?
The RBIAS pin sets the internal current reference to configure the ISL62881HRTZ for either CPU or GPU VR applications. A 147kΩ resistor to GND configures it for CPU core use (DPRSLPVR controls diode emulation only), while a 47kΩ resistor configures it for GPU core use (DPRSLPVR also controls Vcore slew rate: 5 mV/µs low, 10 mV/µs high). RBIAS voltage is internally regulated to ~1.47V.
Is the ISL62881HRTZ pin-compatible with the ISL62881BHRTZ?
No, the ISL62881HRTZ is not pin-compatible with the ISL62881BHRTZ. The ISL62881HRTZ uses a 28-pin 4×4 mm TQFN package, while the ISL62881BHRTZ uses a 32-pin 5×5 mm TQFN package with additional pins including VR_TT#, NTC, LGATEa, and LGATEb. Layout redesign and schematic changes are required for substitution.
ISL62881HRTZ 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:
- 5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.013V ~ 1.5V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
ISL62881HRTZ FAQ
1.How can I place an order for ISL62881HRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62881HRTZ 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 ISL62881HRTZ reliable?
The price and inventory of ISL62881HRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62881HRTZ is usually 5 days.
3.What payment methods are accepted for ISL62881HRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62881HRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62881HRTZ?
ISL62881HRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62881HRTZ 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 ISL62881HRTZ?
For technical support, including ISL62881HRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62881HRTZ requirements.
6.How does Aetrix verify that ISL62881HRTZ is sourced from the original manufacturer or authorized distributors?
All ISL62881HRTZ 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 ISL62881HRTZ meets industry standards.
7.What is the process for return or replacement of ISL62881HRTZ?
All ISL62881HRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL62881HRTZ, 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 ISL62881HRTZ part is unused and in its original packaging.
Return procedure for ISL62881HRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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