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Renesas ISL62881HRTZ-T
- Part No.:
- ISL62881HRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
ISL62881HRTZ-T.pdf
- Description:
- IC REG PWM SGL PHASE 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,442
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Product details
Overview
ISL62881HRTZ-T from Renesas Electronics (formerly 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 gate drivers, supports 7-bit VID input (0.0125V–1.500V), delivers ±0.5% system voltage accuracy over temperature, and uses Robust Ripple Regulator (R3™) technology for adaptive switching frequency up to 500 kHz in transient events. It enables diode emulation mode for light-load efficiency in notebook CPU/GPU VR applications.
For engineers reviewing the ISL62881HRTZ-T datasheet, ISL62881HRTZ-T pinout, ISL62881HRTZ-T application, or ISL62881HRTZ-T equivalent, key selection criteria include IMVP-6.5™ compliance, differential remote sensing capability, DCR/resistor current sensing flexibility, adaptive body diode conduction time reduction, and user-selectable overshoot reduction for capacitor optimization.
Technical Context
The ISL62881HRTZ-T implements a patented R3™ modulator that synthesizes a noise-immune ripple signal (Vcrs) mirroring inductor current, enabling faster transient response than fixed-frequency PWM while maintaining 0.5% DC accuracy via an error amplifier. Its master-slave clock architecture dynamically adjusts switching frequency during load steps - increasing it under heavy transients and reducing it at light load to boost efficiency.
It supports dual current-sensing methods: lossless inductor DCR sensing with NTC thermal compensation for load line stability, or precision resistor-based sensing. The device uses differential remote voltage sensing (VSEN/RTN) referenced directly to the processor die, and features adaptive body diode conduction time reduction to minimize reverse conduction loss in diode emulation mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Range | Output regulated from 0.0125 V to 1.500 V via 7-bit VID; supports full IMVP-6.5™ specification. |
| System Accuracy | ±0.5% over –10°C to +100°C ambient, ensuring stable core voltage under thermal stress. |
| Switching Frequency | Adjustable 200–500 kHz; nominal 300 kHz at VW=1 V; variable during transients for enhanced loop bandwidth. |
| Current Sensing | Supports both DCR (with NTC compensation) and discrete resistor methods; enables accurate load-line droop and IMON reporting. |
| Gate Drive Capability | UGATE/LGATE drivers deliver ≥2 A peak sink/source; deadtime controlled at 23 ns (UGATE→LGATE) and 28 ns (LGATE→UGATE). |
| Protection Features | Programmable overvoltage (150–240 mV above setpoint), severe OV (1.525–1.575 V), undervoltage (–355 to –235 mV), and overcurrent via ISUM- threshold. |
| Package | 28-pin 4×4 mm TQFN with exposed thermal pad; RoHS-compliant, MSL3, θJA = 40°C/W. |
Pinout & Package
ISL62881HRTZ-T is housed in a 28-lead 4×4 mm TQFN package with exposed GND pad on the bottom for thermal dissipation. Pin functions are validated per FN6924 Rev 3.00 datasheet (pages 2–3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | Voltage identification inputs | 7-bit parallel bus setting output voltage in 12.5 mV steps; supports dynamic VID changes during operation. |
| VR_ON | Regulator enable input | Active-high logic control; initiates soft-start sequence when driven high (>0.7 V). |
| DPRSLPVR | Diode emulation control | Enters/exits diode emulation mode; controls slew rate only in GPU configuration (RBIAS = 47 kΩ). |
| UGATE / LGATE | High-side / low-side gate drivers | Direct drive outputs for external MOSFETs; integrated shoot-through protection and precise deadtime control. |
| VSEN / RTN | Differential remote sense inputs | Connect to CPU/GPU die VCC and ground pins to eliminate PCB IR drop errors in regulation. |
| IMON | Analog current monitor output | Current-source output proportional to output current (e.g., 120 µA at 20 µA ISUM-); used for system telemetry. |
| COMP | Error amplifier output | Internal node for loop compensation; resistor-to-GND sets overcurrent threshold. |
| PGOOD | Power-good open-drain output | Asserts after ~7 ms when output is within 10% of target and stable; requires external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Combines hysteretic responsiveness with PWM accuracy; achieves faster transient recovery without sacrificing DC regulation. |
| Adaptive Body Diode Conduction Time Reduction | Minimizes reverse conduction loss in diode emulation mode by turning off LGATE precisely at zero-crossing of phase node voltage. |
| User-selectable Overshoot Reduction | Allows aggressive reduction of output capacitance count; configurable via external component to balance thermal stress vs. size/cost. |
| Differential Remote Voltage Sensing | Compensates for PCB trace resistance drop, enabling ±0.5% regulation accuracy directly at processor die. |
| Thermally Compensated DCR Sensing | Single NTC thermistor compensates copper winding resistance drift, preserving load-line accuracy across –10°C to +100°C. |
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 Vcore with dynamic VID updates and differential die sensing. Use Value: Enables <1.5% total voltage deviation under 10 A load step, meeting Intel's tight core voltage tolerance requirements. | Use Scenario: Core power supply for NVIDIA GeForce MX or AMD Radeon Vega graphics in compact mobile platforms. IC Role / Device Role / Timing Role: GPU-specific VR controller supporting audio-filtering mode and DPRSLPVR-controlled slew rate (5/10 mV/µs). Use Value: Delivers stable GPU VDD with <0.5% accuracy and optimized light-load efficiency via diode emulation and split-LGATE logic. |
| Notebook System Power Sequencing | IMVP-6.5™ Compliance Reference Design |
Use Scenario: Coordinating power-up timing between CPU, GPU, and chipset in multi-rail notebook motherboards. IC Role / Device Role / Timing Role: Generates CLK_EN# signal 13 switching cycles after Vcore reaches 90% of boot voltage, synchronizing PLL activation. Use Value: Ensures deterministic clock domain enablement, preventing race conditions during boot and sleep/wake transitions. | Use Scenario: Reference implementation for OEMs validating IMVP-6.5™ compliance in next-generation mobile platforms. IC Role / Device Role / Timing Role: Fully compliant single-phase controller supporting all IMVP-6.5™ commands including VR_TT#, DPRSLPVR, and PGOOD assertion timing. Use Value: Reduces qualification time by providing pre-validated layout, BOM, and thermal design aligned with Intel's VR specification. |
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 for deeper sleep efficiency. | Required where platform-level thermal throttling coordination or ultra-low-power idle states (e.g., S0ix) are mandated. | Select ISL62881BHRTZ only if VR_TT# signaling or dual-LGATE control is explicitly required; ISL62881HRTZ-T is sufficient for standard IMVP-6.5™ CPU/GPU VR. |
| RTQ2132BGQW | Single-phase IMVP-8 controller; higher max VID (1.55 V), tighter ±0.3% accuracy, integrated MOSFET drivers rated for 4 A sink/source. | Targets newer Intel 11th+ Gen CPUs requiring IMVP-8 protocol support and higher current density. | Choose RTQ2132BGQW only for IMVP-8 designs; ISL62881HRTZ-T remains optimal for legacy IMVP-6.5™ platforms with cost and footprint constraints. |
Compared with ISL62881BHRTZ and RTQ2132BGQW, the ISL62881HRTZ-T provides the minimal-footprint, cost-optimized solution for IMVP-6.5™ compliance without over-engineering - retaining full functionality (R3™ modulation, DCR sensing, differential sensing) in a 4×4 mm package while avoiding unnecessary thermal or protocol overhead.
Availability
ISL62881HRTZ-T is available at Aetrix Electronics and suitable for notebook computer power delivery, mobile CPU/GPU voltage regulation, and IMVP-6.5™ reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL62881HRTZ-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 is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL62881HRTZ-T belongs to Renesas' high-efficiency VR controller product line, engineered specifically for Intel IMVP-6.5™ mobile processor core power with emphasis on transient performance, thermal robustness, and board-space efficiency.
FAQ
What is the primary function of the ISL62881HRTZ-T in a notebook power system?
The ISL62881HRTZ-T serves as a single-phase PWM buck regulator IC that delivers tightly regulated core voltage to mobile CPUs and GPUs in compliance with Intel's IMVP-6.5™ specification. It integrates gate drivers, supports 7-bit VID programming, implements R3™ modulation for fast transient response, and enables diode emulation mode to improve light-load efficiency - all within a compact 4×4 mm TQFN package.
Does the ISL62881HRTZ-T support differential remote voltage sensing, and why is it critical?
Yes, the ISL62881HRTZ-T supports differential remote sensing via VSEN and RTN pins, which connect directly to the processor die's VCC and ground pads. This eliminates voltage drop errors caused by PCB trace resistance, enabling ±0.5% system accuracy at the point of load - a requirement for modern low-voltage, high-current mobile processors where even 10 mV deviation can impact stability or performance.
How does the R3™ modulator in the ISL62881HRTZ-T improve transient response compared to traditional PWM controllers?
The R3™ modulator in the ISL62881HRTZ-T synthesizes a clean, large-amplitude ripple signal (Vcrs) mimicking inductor current, allowing the controller to detect load steps earlier and increase switching frequency dynamically. During a load step, COMP voltage rises rapidly, shortening the clock period and widening PWM pulses - achieving faster recovery than fixed-frequency PWM while retaining DC accuracy via its error amplifier.
Can the ISL62881HRTZ-T be used for both CPU and GPU core power applications?
Yes, the ISL62881HRTZ-T is configurable for either CPU or GPU VR applications via the RBIAS resistor: 147 kΩ selects CPU mode (DPRSLPVR controls diode emulation only), while 47 kΩ selects GPU mode (DPRSLPVR also controls Vcore slew rate at 5 mV/µs or 10 mV/µs). It also supports GPU-specific features like audio-filtering mode and differential sensing optimized for graphics die characteristics.
What current sensing methods does the ISL62881HRTZ-T support, and how is thermal drift compensated?
The ISL62881HRTZ-T supports two current sensing methods: lossless inductor DCR sensing and precision resistor-based sensing. For DCR sensing, a single NTC thermistor connected to the NTC pin (on ISL62881B) or configured externally (on ISL62881) compensates for the positive temperature coefficient of copper windings, maintaining accurate load-line droop and overcurrent protection across –10°C to +100°C ambient.
ISL62881HRTZ-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:
- 5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.013V ~ 1.5V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
ISL62881HRTZ-T FAQ
1.How can I place an order for ISL62881HRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62881HRTZ-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 ISL62881HRTZ-T reliable?
The price and inventory of ISL62881HRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62881HRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL62881HRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62881HRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62881HRTZ-T?
ISL62881HRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62881HRTZ-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 ISL62881HRTZ-T?
For technical support, including ISL62881HRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62881HRTZ-T requirements.
6.How does Aetrix verify that ISL62881HRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL62881HRTZ-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 ISL62881HRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL62881HRTZ-T?
All ISL62881HRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL62881HRTZ-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 ISL62881HRTZ-T part is unused and in its original packaging.
Return procedure for ISL62881HRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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