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Renesas ISL95836HRTZ
- Part No.:
- ISL95836HRTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95836HRTZ.pdf
- Description:
- IC REG IMVP-7 VR12 2OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,706
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Product details
Overview
ISL95836HRTZ from Renesas (formerly Intersil) is a dual-output IMVP-7/VR12™ PWM controller IC for CPU and GPU core power supplies, featuring two independent VR channels - a 3+2-phase configurable architecture (3-/2-/1-phase for Vcore, 2-/1-phase for graphics), R3 modulator technology, 0.5% system voltage accuracy over temperature, and integrated gate drivers. It targets high-efficiency, fast-transient notebook and desktop motherboard VR designs.
For engineers reviewing the ISL95836HRTZ datasheet, ISL95836HRTZ pinout, ISL95836HRTZ application, or ISL95836HRTZ equivalent, key selection criteria include phase configurability per output, DCR/resistor current sensing support, serial bus interface compatibility with IMVP-7/VR12™ CPUs, remote differential sensing capability, and programmable VBOOT, IMAX, and switching frequency for both outputs.
Technical Context
The ISL95836HRTZ implements two independent VR control loops sharing a single SMBus-compatible serial interface to reduce component count and PCB area. Its R3 modulator enables variable-frequency operation during load transients and automatic frequency scaling at light load to improve efficiency.
Each output supports lossless DCR current sensing with single NTC thermistor compensation or precision resistor-based sensing, plus differential remote voltage sensing, programmable overcurrent thresholds, and adaptive body diode conduction time reduction to minimize synchronous rectifier losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Controller Type | Dual-output IMVP-7/VR12™ PWM controller with integrated gate drivers |
| Phase Configuration | Output 1: 3-/2-/1-phase; Output 2: 2-/1-phase - enables flexible Vcore + GPU VR partitioning |
| Modulator Technology | Robust Ripple Regulator R3™ - delivers faster transient response and light-load efficiency via variable switching frequency |
| Voltage Accuracy | ±0.5% over temperature - ensures tight regulation for modern CPU/GPU core rails |
| Current Sensing | DCR sensing with NTC compensation or precision resistor sensing - supports lossless or high-accuracy current monitoring |
| Interface | SMBus-compatible serial bus - enables communication with IMVP-7/VR12™ processors without external protocol translation |
| Protection Features | Programmable OCP per output, adaptive body diode timing, separate Power-Good signals - provides robust fault handling per VR channel |
Pinout & Package
ISL95836HRTZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95836 datasheet (FN7835 Rev 1.00).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input voltage supply pins | Accept separate input rails for each VR channel; enable independent input source routing |
| PHASE1–PHASE3, PHASE4–PHASE5 | Phase driver outputs | Drive high-side/low-side MOSFETs for 3-phase (Vcore) and 2-phase (graphics) configurations |
| SMBCLK, SMBDAT | Serial bus interface | Connect to CPU's SMBus for IMVP-7/VR12™ command and telemetry exchange |
| VSNS1+, VSNS1−, VSNS2+, VSNS2− | Differential remote sense inputs | Enable accurate load-line regulation by measuring voltage directly at CPU/GPU pads |
| IMON1, IMON2 | Current monitor outputs | Analog outputs proportional to sensed load current per VR - used for telemetry or protection |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent VR control with shared SMBus | Reduces BOM count and board space vs. discrete dual-controller solutions while maintaining per-rail programmability |
| R3 modulator with variable-frequency operation | Improves transient response by dynamically adjusting switching frequency during load steps and boosts light-load efficiency |
| Programmable VBOOT voltage | Allows optimization of bootstrap capacitor charging for reliable high-side gate drive across input voltage ranges |
| Differential remote sensing per output | Compensates for IR drop in power delivery paths to maintain ±0.5% regulation at point-of-load |
| Adaptive body diode conduction time reduction | Minimizes reverse recovery losses in low-side MOSFETs during light-load discontinuous conduction mode |
Applications
| Notebook CPU Core VR | Desktop GPU Core VR |
|---|---|
Use Scenario: High-performance ultrabook motherboard delivering dynamic Vcore to Intel Core i7/i9 processors under IMVP-7/VR12™ compliance. IC Role / Device Role / Timing Role: Primary PWM controller managing 3-phase Vcore regulation, serial telemetry, and load-line compliance. Use Value: Enables sub-1% voltage deviation across 0–60A load range with <10µs transient recovery using R3 modulator and remote sensing. | Use Scenario: Mini-ITX gaming motherboard powering NVIDIA GeForce RTX GPU cores requiring tightly regulated 0.8–1.0V rails. IC Role / Device Role / Timing Role: Secondary VR controller operating in 2-phase mode for graphics rail, synchronized via shared SMBus. Use Value: Delivers programmable IMAX and switching frequency per GPU load profile while sharing serial bus resources with CPU VR. |
| VR12 Server Processor VR | IMVP-7 Embedded Controller VR |
Use Scenario: Dual-socket server motherboard supporting VR12-compliant Xeon Scalable processors with multi-phase core power delivery. IC Role / Device Role / Timing Role: Dual-channel controller implementing split-phase topology for enhanced thermal distribution and current sharing. Use Value: Supports 3+2-phase configuration with independent current sensing and protection per rail - critical for reliability in 24/7 operation. | Use Scenario: Industrial embedded computing platform using IMVP-7-compliant Atom or Celeron processors in fanless enclosures. IC Role / Device Role / Timing Role: Compact dual-output VR controller enabling full IMVP-7 feature set (load line, telemetry, thermal compensation) in space-constrained layouts. Use Value: Achieves 0.5% system accuracy over −40°C to +105°C ambient with single NTC thermistor for DCR compensation. |
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 | Same pinout and feature set but supports VR12.5/IMVP-8; adds SVID 2.0 compatibility and enhanced telemetry resolution | Required for newer Intel 8th-gen+ CPUs with VR12.5 compliance; not backward compatible with IMVP-7-only systems | Select ISL95837HRTZ only when targeting VR12.5/IMVP-8 platforms; ISL95836HRTZ remains optimal for IMVP-7/VR12™ designs. |
| RT8803AGQW | Single-chip dual-output VR controller with integrated MOSFET drivers; supports IMVP-7 but lacks R3 modulator and uses fixed-frequency PWM | Lower cost solution for entry-level notebooks; limited transient performance and light-load efficiency vs. ISL95836HRTZ | Choose RT8803AGQW where BOM cost dominates over transient response; retain ISL95836HRTZ for high-performance client platforms. |
Compared with ISL95836HRTZ, ISL95837HRTZ extends compliance to VR12.5/IMVP-8 and improves telemetry fidelity, while RT8803AGQW offers lower integration cost at the expense of R3-based transient and efficiency advantages - making ISL95836HRTZ the balanced choice for mainstream IMVP-7/VR12™ designs.
Availability
ISL95836HRTZ is available at Aetrix Electronics and suitable for notebook CPU VR, desktop GPU VR, and IMVP-7/VR12™ server motherboard designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL95836HRTZ 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, and computing markets.
The ISL95836HRTZ belongs to Renesas' high-performance power management portfolio designed specifically for IMVP-7/VR12™ compliant CPU and GPU core voltage regulation in client and server platforms.
FAQ
What is the primary function of the ISL95836HRTZ in a motherboard power delivery system?
The ISL95836HRTZ serves as a dual-output PWM controller that manages core voltage regulation for both CPU and GPU on IMVP-7/VR12™-compliant motherboards. It implements two independent VR control loops - one configurable for 3-/2-/1-phase (Vcore) and another for 2-/1-phase (graphics) - with integrated gate drivers, R3 modulator technology, and SMBus interface. The ISL95836HRTZ enables precise load-line regulation, fast transient response, and coordinated telemetry without requiring separate controllers.
Does the ISL95836HRTZ support DCR current sensing, and how is temperature compensation handled?
Yes, the ISL95836HRTZ supports lossless inductor DCR current sensing on both outputs. Temperature compensation is achieved using a single NTC thermistor connected to the THERM pin, which adjusts the DCR sensing gain to maintain accuracy across operating temperature. This eliminates the need for multiple thermistors or external compensation circuitry. The ISL95836HRTZ also supports optional precision resistor current sensing for higher accuracy where DCR tolerance or layout constraints limit its use.
What serial interface does the ISL95836HRTZ use to communicate with the CPU, and is it compatible with IMVP-7/VR12™ specifications?
The ISL95836HRTZ uses an SMBus-compatible 2-wire serial interface (SMBCLK/SMBDAT) to communicate with IMVP-7/VR12™-compliant processors. It fully supports the SVID (Serial Voltage Identification) protocol required by these standards, enabling dynamic voltage scaling, telemetry reporting (voltage, current, temperature), and fault signaling. The ISL95836HRTZ shares this bus between both VR outputs, reducing pin count and simplifying system-level integration compared to dual-chip alternatives.
How does the R3 modulator in the ISL95836HRTZ improve performance compared to traditional fixed-frequency PWM controllers?
The R3 modulator in the ISL95836HRTZ improves performance by enabling variable switching frequency during load transients - increasing frequency for faster response and decreasing it at light loads to reduce switching losses. This results in superior transient response (<10 µs recovery) and higher light-load efficiency versus fixed-frequency controllers. Unlike conventional modulators, R3 maintains stability without external compensation components. The ISL95836HRTZ leverages this architecture across both VR outputs to deliver consistent regulation under dynamic workloads.
What package type and thermal characteristics does the ISL95836HRTZ use, and how is heat dissipation managed?
The ISL95836HRTZ is packaged in a 48-pin QFN (7mm × 7mm, 0.5mm pitch) with an exposed thermal pad. Thermal resistance θJA is 30°C/W typical when mounted on a 4-layer PCB with 1-in² copper pour under the pad. The device integrates thermal monitoring via internal die temperature sensing and supports thermal throttling through the SMBus interface. Proper PCB layout - including vias under the thermal pad and adequate ground plane copper - is essential to maintain junction temperature within the −40°C to +125°C operational range specified for the ISL95836HRTZ.
ISL95836HRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Controller, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.75V ~ 5.25V
- 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)
ISL95836HRTZ FAQ
1.How can I place an order for ISL95836HRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95836HRTZ 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 ISL95836HRTZ reliable?
The price and inventory of ISL95836HRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95836HRTZ is usually 5 days.
3.What payment methods are accepted for ISL95836HRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95836HRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95836HRTZ?
ISL95836HRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95836HRTZ 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 ISL95836HRTZ?
For technical support, including ISL95836HRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95836HRTZ requirements.
6.How does Aetrix verify that ISL95836HRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95836HRTZ 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 ISL95836HRTZ meets industry standards.
7.What is the process for return or replacement of ISL95836HRTZ?
All ISL95836HRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95836HRTZ, 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 ISL95836HRTZ part is unused and in its original packaging.
Return procedure for ISL95836HRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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