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Renesas ISL95838HRTZ-T
- Part No.:
- ISL95838HRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95838HRTZ-T.pdf
- Description:
- IC REG IMVP-7 VR12 2OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,918
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Product details
Overview
ISL95838HRTZ-T from Renesas (formerly Intersil) is a dual-output IMVP-7/VR12™ PWM controller IC for CPU and GPU core power supplies, supporting 3+2-phase configurations (3-/2-/1-phase for Vcore VR, 2-/1-phase for Graphics VR), R3 modulator technology, 0.5% system voltage accuracy over temperature, and serial bus communication with the processor.
For engineers reviewing the ISL95838HRTZ-T datasheet, ISL95838HRTZ-T pinout, ISL95838HRTZ-T application, or ISL95838HRTZ-T equivalent, key selection considerations include phase configurability per output, DCR/resistor current sensing support, remote differential voltage sensing, programmable VBOOT, IMAX, switching frequency, and adaptive body diode conduction control.
Technical Context
The ISL95838HRTZ-T integrates two independent VR controllers sharing a single serial interface (SVID) to reduce component count and board area versus discrete dual-controller solutions. Each VR employs Renesas' proprietary R3 modulator architecture, enabling variable-frequency operation during load transients for improved dynamic response and light-load efficiency.
Both outputs support lossless DCR current sensing with integrated NTC thermistor compensation or precision resistor-based sensing, plus differential remote sense, programmable overcurrent thresholds, and separate Power-Good signals - all configurable via SVID commands or external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Controller Type | Dual VR PWM controller for IMVP-7/VR12™ compliant CPU/GPU core supplies |
| Phase Support | Output 1: 3-/2-/1-phase; Output 2: 2-/1-phase - enables flexible layout and thermal partitioning |
| R3 Modulator | Variable-frequency operation during transients - delivers faster response and higher light-load efficiency |
| Voltage Accuracy | ±0.5% over temperature - ensures tight regulation across operating range for stable processor operation |
| Current Sensing | DCR with NTC compensation or precision resistor - supports lossless or high-accuracy current monitoring |
| Interface | SVID serial bus - enables dynamic voltage/frequency scaling and telemetry with Intel processors |
| Remote Sense | Differential voltage sensing - rejects PCB IR drop for accurate point-of-load regulation |
Pinout & Package
ISL95838HRTZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95838 datasheet (FN7878 Rev 2.00).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input voltage supply pins | Separate input rails for each VR stage - supports independent input source routing and decoupling |
| VSENSE1+, VSENSE1− VSENSE2+, VSENSE2− | Differential remote sense inputs | Enable precise point-of-load voltage regulation by measuring at CPU/GPU pads, rejecting trace resistance error |
| SVID_DATA, SVID_CLK | SVID serial interface | Two-wire bidirectional bus for dynamic voltage/frequency commands and telemetry reporting to processor |
| PGOOD1, PGOOD2 | Power-good status outputs | Open-drain signals indicating valid regulation per VR - used for sequencing and fault isolation |
| VBOOT1, VBOOT2 | Bootstrap voltage inputs | Programmable start-up boot voltage - sets initial gate drive level for high-side MOSFETs |
| IMON1, IMON2 | Current monitor outputs | Analog outputs proportional to sensed load current - used for system-level current telemetry and protection |
Key Features
| Feature | Design Value |
|---|---|
| R3 Modulator Architecture | Enables variable-frequency operation during load steps - improves transient response time and reduces light-load power loss |
| Dual Independent SVID Interfaces | Single shared SVID bus controls both VRs - eliminates need for second SVID master and saves PCB space |
| Programmable VBOOT | Adjustable bootstrap voltage per VR - optimizes high-side FET turn-on timing across input voltage and temperature |
| Adaptive Body Diode Conduction Control | Reduces reverse conduction time in synchronous rectifiers - lowers switching losses and improves efficiency |
| DCR + NTC Compensation | On-chip thermistor interface compensates inductor DCR drift with temperature - maintains current-sense accuracy without external ICs |
Applications
| Desktop CPU Core Power Supply | Laptop CPU Core Power Supply |
|---|---|
Use Scenario: High-performance desktop motherboard delivering regulated Vcore to Intel IMVP-7/VR12™ CPUs under dynamic workloads. IC Role / Device Role / Timing Role: Primary PWM controller managing 3-phase Vcore VR with SVID command interface and remote sensing. Use Value: ±0.5% voltage accuracy and R3 modulator ensure stable CPU operation during rapid load changes up to 100A/s. | Use Scenario: Slim-profile laptop motherboard powering dual-core mobile CPU with strict thermal and space constraints. IC Role / Device Role / Timing Role: Dual-output controller handling both CPU Vcore (2-phase) and GPU Vcore (1-phase) from shared input rail. Use Value: Single-chip integration reduces BOM count and PCB area while maintaining independent VR control and telemetry. |
| VR12-Compliant Graphics Core Supply | IMVP-7 Server Processor Supply |
Use Scenario: Discrete GPU reference design requiring tightly regulated graphics core voltage with dynamic VID updates. IC Role / Device Role / Timing Role: Secondary VR controller (Output 2) configured for 2-phase operation with SVID-synchronized voltage scaling. Use Value: Differential remote sensing and programmable IMAX prevent GPU throttling due to voltage droop at the die. | Use Scenario: 1U server motherboard supplying multi-core Xeon processor with IMVP-7 compliance and telemetry requirements. IC Role / Device Role / Timing Role: Dual VR controller providing independent Vcore and uncore rail control via shared SVID bus and separate PGOOD signals. Use Value: Integrated DCR+NTC compensation ensures accurate current reporting across −40°C to +105°C ambient for thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95837HRTZ-T | Single-output VR controller (3-/2-/1-phase); lacks second VR channel and SVID sharing logic | Only suitable for CPU-only or GPU-only designs - cannot replace dual-VR functionality | Select when only one regulated rail is required and cost minimization is critical |
| RT8803AZQW | Single-chip dual-VR controller with SVID, but uses conventional COT modulator (not R3); no DCR+NTC compensation engine | Supports IMVP-7/VR12 but lacks adaptive body diode control and variable-frequency transient response | Choose where R3-specific benefits are non-critical and lower BOM cost is prioritized |
Compared with ISL95838HRTZ-T, ISL95837HRTZ-T requires external coordination for dual-rail systems, while RT8803AZQW trades R3's transient performance and DCR compensation for simpler implementation - making ISL95838HRTZ-T optimal for high-dynamic, thermally constrained IMVP-7/VR12 platforms.
Availability
ISL95838HRTZ-T is available at Aetrix Electronics and suitable for desktop motherboards, laptop power subsystems, VR12-compliant graphics cards, and IMVP-7 server processor supplies requiring stable component supply and long-term lifecycle support.
Supply support for ISL95838HRTZ-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) is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for automotive, industrial, and computing markets.
The ISL95838HRTZ-T belongs to Renesas' high-efficiency VR controller product line, designed specifically to meet Intel IMVP-7 and VR12™ specifications for next-generation CPU and GPU core power delivery.
FAQ
What is the primary function of the ISL95838HRTZ-T in a CPU power delivery system?
The ISL95838HRTZ-T serves as a dual-output PWM controller that manages both CPU core (Vcore) and graphics core (Vgpu) voltage regulator modules in IMVP-7/VR12™-compliant systems. It implements R3 modulator technology, supports SVID communication with the processor, and provides independent configuration for phase count, current sensing, and protection per output - enabling compact, high-accuracy, and dynamically responsive power delivery in modern computing platforms.
Does the ISL95838HRTZ-T support DCR current sensing with temperature compensation?
Yes, the ISL95838HRTZ-T supports lossless inductor DCR current sensing with on-chip NTC thermistor compensation. This feature allows real-time correction of DCR resistance drift due to temperature changes, maintaining current-sense accuracy across the full operating range without requiring external compensation circuitry - a capability confirmed in the FN7878 datasheet for the ISL95838HRTZ-T.
What package type and pin count does the ISL95838HRTZ-T use?
The ISL95838HRTZ-T is packaged in a 48-pin QFN (7mm × 7mm, 0.5mm pitch) with an exposed thermal pad. This package is specified in the official Renesas datasheet FN7878 Rev 2.00 and supports high-density motherboard layouts while enabling efficient thermal dissipation for the ISL95838HRTZ-T in dual-VR applications.
Can the ISL95838HRTZ-T be used in both desktop and mobile computing platforms?
Yes, the ISL95838HRTZ-T is qualified for use in both desktop and mobile platforms compliant with IMVP-7 and VR12™ standards. Its configurable phase support (3-/2-/1-phase for Vcore, 2-/1-phase for Vgpu), wide input voltage range, and thermal compensation make it suitable for high-power desktop motherboards and space-constrained laptop designs - as validated in application circuits referenced in the ISL95838HRTZ-T datasheet.
How does the R3 modulator in the ISL95838HRTZ-T improve power supply performance?
The R3 modulator in the ISL95838HRTZ-T improves performance by enabling variable switching frequency during load transients - resulting in faster voltage recovery, reduced output voltage deviation, and higher efficiency at light loads. Unlike fixed-frequency or traditional COT architectures, R3 dynamically adjusts frequency based on load step magnitude and direction, a behavior explicitly documented for the ISL95838HRTZ-T in FN7878 Rev 2.00.
ISL95838HRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.75V ~ 25V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL95838HRTZ-T FAQ
1.How can I place an order for ISL95838HRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95838HRTZ-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 ISL95838HRTZ-T reliable?
The price and inventory of ISL95838HRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95838HRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL95838HRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95838HRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95838HRTZ-T?
ISL95838HRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95838HRTZ-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 ISL95838HRTZ-T?
For technical support, including ISL95838HRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95838HRTZ-T requirements.
6.How does Aetrix verify that ISL95838HRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95838HRTZ-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 ISL95838HRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL95838HRTZ-T?
All ISL95838HRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95838HRTZ-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 ISL95838HRTZ-T part is unused and in its original packaging.
Return procedure for ISL95838HRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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