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Renesas ISL62881CHRTZ-T
- Part No.:
- ISL62881CHRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
ISL62881CHRTZ-T.pdf
- Description:
- IC REG CTRL IMVP-6.5 1OUT 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,761
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Product details
Overview
ISL62881CHRTZ-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 supplies. It integrates high- and low-side gate drivers, supports DCR/resistor current sensing, delivers ±0.5% system accuracy over temperature, enables differential remote voltage sensing, and operates with R3™ modulator technology for fast transient response and adaptive light-load efficiency.
For engineers reviewing the ISL62881CHRTZ-T datasheet, ISL62881CHRTZ-T pinout, ISL62881CHRTZ-T application, or ISL62881CHRTZ-T equivalent, key selection criteria include IMVP-6.5™ compliance, 28-pin 4×4 mm TQFN package, VID-programmable output (0.7–1.5 V), diode emulation mode, and integrated current monitoring via IMON pin.
Technical Context
The ISL62881CHRTZ-T implements Intersil's patented Robust Ripple Regulator (R3™) architecture, combining fixed-frequency PWM stability with hysteretic-like transient responsiveness. Its master-slave ripple capacitor circuit dynamically adjusts switching frequency during load transients-increasing frequency under load step-up and stretching period at light load-while maintaining tight regulation via an error amplifier with 90 dB DC gain and 18 MHz GBW.
It supports dual current-sensing methods (inductor DCR or discrete resistor), provides differential remote sensing (VSEN/RTN), implements adaptive body diode conduction time reduction in diode emulation mode, and features programmable overshoot reduction. The device responds to DPRSLPVR for deep-sleep entry/exit and reports real-time output current via the IMON analog output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Standard | Fully compliant with Intel IMVP-6.5™ protocol for mobile CPU/GPU core VRs. |
| Output Voltage Range | 0.700 V to 1.500 V (7-bit VID programmable, 12.5 mV steps). |
| System Accuracy | ±0.5% over temperature (0.75–1.50 V range), enabling precise die-level voltage control. |
| Switching Frequency | 200–500 kHz adjustable (300 kHz typical); dynamically varies with load for optimized transient response. |
| Current Sensing | Supports lossless DCR sensing or precision resistor sensing; uses ISUM+/ISUM− inputs. |
| Gate Drive Capability | UGATE: 2.0 A source/sink; LGATE: 4.0 A sink / 2.0 A source; deadtime <30 ns. |
| Thermal Range | –10°C to +100°C ambient (HRTZ grade); junction max +125°C. |
| Package | 28-lead 4×4 mm TQFN (L28.4x4), exposed thermal pad, RoHS-compliant. |
Pinout & Package
ISL62881CHRTZ-T is housed in a 28-lead, 4 mm × 4 mm, 0.5 mm pitch TQFN package with an exposed GND thermal pad on the bottom. Pin numbering follows standard top-view orientation (Pin 1 at top-left corner, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID6 | 7-bit digital input | Set core output voltage per IMVP-6.5™ VID table; VID0 = LSB, VID6 = MSB. |
| VR_ON | Enable control input | Active-high logic input; must exceed 0.7 V to activate regulator and initiate soft-start. |
| DPRSLPVR | Deep-sleep mode control | High signal triggers diode emulation mode and adaptive body diode timing reduction. |
| VSEN / RTN | Differential remote sense pair | Connect directly to processor die for accurate closed-loop regulation, rejecting PCB IR drop. |
| ISUM+ / ISUM− | Current-sense differential input | Accepts voltage from DCR network or sense resistor; enables droop-based load line implementation. |
| IMON | Analog current monitor output | Outputs 60 µA per 1 µA of sensed ISUM− current; used for telemetry and protection. |
| UGATE / LGATE | High-/low-side MOSFET gate drivers | Drive external N-channel MOSFETs; LGATE supports diode emulation with adaptive turn-off. |
| PHASE / BOOT / VSSP / VCCP | Power stage interface | PHASE connects to HS-FET source/LS-FET drain node; BOOT supplies HS driver; VSSP/VCCP are LS/HS bias return paths. |
| PGOOD / CLK_EN# | Open-drain status outputs | PGOOD asserts after output stabilizes within 10%; CLK_EN# enables system PLL 13 cycles post-regulation. |
| RBIAS | Application configuration | 147 kΩ sets CPU mode; 47 kΩ configures GPU mode; selects internal current reference. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Delivers faster transient settling than fixed-frequency PWM and lower phase jitter than hysteretic controllers, with 0.5% accuracy maintained by integrated error amplifier. |
| Adaptive Diode Emulation | Monitors PHASE node voltage to shut off LGATE precisely at zero-current crossing, eliminating reverse conduction loss in light-load DCM operation. |
| User-Selectable Overshoot Reduction | Reduces output voltage overshoot during load transients; can be disabled if thermal stress from added switching is a concern. |
| Differential Remote Sensing | VSEN/RTN pair enables direct die-voltage feedback, compensating for PCB trace resistance and ensuring accurate core regulation under dynamic load. |
| Integrated Current Monitoring | IMON pin provides scalable analog current output (120 µA typical at 20 µA ISUM−), supporting real-time telemetry and overcurrent protection without external amplifiers. |
| Programmable Load Line | Uses ISUM+/ISUM− inputs and internal droop amplifier to implement precise resistive load line (VOUT = VID − IOUT × RLL), meeting IMVP-6.5™ droop requirements. |
Applications
| Notebook CPU Core VR | Notebook GPU Core VR |
|---|---|
Use Scenario: Power delivery to Intel Core i-series or AMD Ryzen mobile CPUs during active compute and turbo boost. IC Role / Device Role / Timing Role: Primary single-phase IMVP-6.5™ core voltage regulator; manages VID updates, load-line droop, and deep-sleep transitions via DPRSLPVR. Use Value: Enables sub-1% voltage accuracy at die, fast transient response to multi-core load changes, and >90% efficiency at light loads via diode emulation. | Use Scenario: Core power supply for NVIDIA GeForce MX or AMD Radeon Vega integrated GPUs in ultrabooks. IC Role / Device Role / Timing Role: GPU-specific VR controller configured via RBIAS; supports GPU VID tables and differential sensing across GPU package bond wires. Use Value: Maintains stable GPU core voltage during graphics-intensive workloads while minimizing thermal throttling through accurate current reporting and thermal compensation. |
| Gaming Laptop VRM | Thin-and-Light Platform VR |
Use Scenario: High-performance VRM design in 15.6" gaming laptops requiring rapid response to CPU/GPU co-load spikes. IC Role / Device Role / Timing Role: Single-phase regulator driving high-current CPU cores; leverages R3™ frequency agility to suppress output voltage deviation during 10–90% load steps. Use Value: Achieves <50 µs transient recovery time and <20 mV overshoot, reducing need for large bulk capacitance and saving board space. | Use Scenario: Space-constrained VR solution in 13.3" clamshell notebooks where thermal management and layout density are critical. IC Role / Device Role / Timing Role: Compact 4×4 mm TQFN regulator with integrated gate drivers; eliminates external driver ICs and reduces component count. Use Value: Reduces total VRM footprint by ~35% vs. discrete driver + controller solutions, while maintaining IMVP-6.5™ compliance and 0.5% accuracy. |
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 |
|---|---|---|---|
| ISL62881CIRTZ | Same functionality and pinout; extended industrial temp range (–40°C to +100°C) vs. HRTZ (–10°C to +100°C). | Suitable for wider ambient environments including automotive cabin or ruggedized portable devices. | Select ISL62881CIRTZ when operating below –10°C is required; otherwise ISL62881CHRTZ-T is optimal for standard notebook thermal envelopes. |
| RTQ2132BGQW | Single-phase IMVP-6.5™ controller from Richtek; supports same VID range and DCR sensing but lacks DPRSLPVR and IMON output. | Requires external current monitor for telemetry; no deep-sleep diode emulation control signal. | Choose RTQ2132BGQW only if DPRSLPVR signaling and integrated current reporting are not needed; ISL62881CHRTZ-T provides full IMVP-6.5™ feature set. |
Compared with ISL62881CIRTZ, the ISL62881CHRTZ-T offers identical electrical performance and pin compatibility but targets commercial notebook platforms with narrower ambient range; versus RTQ2132BGQW, it delivers complete IMVP-6.5™ compliance-including DPRSLPVR support and analog IMON telemetry-without external components.
Availability
ISL62881CHRTZ-T is available at Aetrix Electronics and suitable for notebook CPU core VR, notebook GPU core VR, and thin-and-light platform VR applications requiring stable component supply, long-term lifecycle support, and IMVP-6.5™ certification readiness.
Supply support for ISL62881CHRTZ-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 maintains its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on microcontrollers, analog, power, and SoC solutions.
The ISL62881CHRTZ-T belongs to Renesas' legacy Intersil IMVP-6.5™ VR controller product line, engineered specifically for energy-efficient, high-accuracy core voltage regulation in mobile computing platforms with stringent transient and thermal requirements.
FAQ
What is the primary function of the ISL62881CHRTZ-T in a notebook power system?
The ISL62881CHRTZ-T serves as a single-phase PWM core voltage regulator for Intel IMVP-6.5™-compliant mobile CPUs and GPUs. It integrates gate drivers, implements R3™ modulation for fast transient response, supports differential remote sensing, and delivers ±0.5% system accuracy. The ISL62881CHRTZ-T manages VID-based voltage programming, load-line droop, diode emulation, and current monitoring-all within a compact 4×4 mm TQFN package.
How does the ISL62881CHRTZ-T achieve high light-load efficiency?
The ISL62881CHRTZ-T achieves high light-load efficiency through adaptive diode emulation mode, which turns off the low-side MOSFET precisely at zero inductor current to prevent reverse conduction loss. It also employs period stretching-reducing switching frequency under light load-enabled by its R3™ modulator architecture. These features, combined with the ability to disable overshoot reduction when thermal stress is a concern, optimize efficiency across the full load range without external circuitry.
Can the ISL62881CHRTZ-T be used for both CPU and GPU core voltage regulation?
Yes, the ISL62881CHRTZ-T supports both CPU and GPU core VR applications via the RBIAS pin: a 147 kΩ resistor configures CPU mode, while a 47 kΩ resistor configures GPU mode. It complies fully with IMVP-6.5™ for CPU and supports GPU-specific VID tables and differential sensing. The ISL62881CHRTZ-T is validated in reference designs ISL62881CCPUEVAL2Z (CPU) and ISL62881CGPUEVAL2Z (GPU), confirming dual-role capability.
What current sensing methods does the ISL62881CHRTZ-T support, and how are they implemented?
The ISL62881CHRTZ-T supports two current sensing methods: lossless inductor DCR sensing and precision discrete resistor sensing. Both use the ISUM+ and ISUM− differential inputs. DCR sensing applies a small RC network across the inductor to generate a voltage proportional to current; resistor sensing places a low-value, high-precision shunt in series with the inductor. The ISL62881CHRTZ-T's internal droop amplifier converts either signal into a load-line offset, enabling accurate IMVP-6.5™ compliance without external op-amps.
Does the ISL62881CHRTZ-T provide output current telemetry, and how is it accessed?
Yes, the ISL62881CHRTZ-T provides real-time output current telemetry via the IMON pin-an analog current output proportional to sensed load current. With 120 µA typical output per 20 µA of ISUM− current, IMON enables direct connection to an ADC or comparator for system-level current monitoring, overcurrent protection, or thermal management. This eliminates the need for external current-sense amplifiers and simplifies BOM in notebook VR designs using the ISL62881CHRTZ-T.
ISL62881CHRTZ-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:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
ISL62881CHRTZ-T FAQ
1.How can I place an order for ISL62881CHRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL62881CHRTZ-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 ISL62881CHRTZ-T reliable?
The price and inventory of ISL62881CHRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL62881CHRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL62881CHRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL62881CHRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL62881CHRTZ-T?
ISL62881CHRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL62881CHRTZ-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 ISL62881CHRTZ-T?
For technical support, including ISL62881CHRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL62881CHRTZ-T requirements.
6.How does Aetrix verify that ISL62881CHRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL62881CHRTZ-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 ISL62881CHRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL62881CHRTZ-T?
All ISL62881CHRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL62881CHRTZ-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 ISL62881CHRTZ-T part is unused and in its original packaging.
Return procedure for ISL62881CHRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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