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Renesas ISL95837HRZ-T
- Part No.:
- ISL95837HRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95837HRZ-T.pdf
- Description:
- IC REG CONV INTEL 2OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,773
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Product details
Overview
ISL95837HRZ-T from Renesas (formerly Intersil) is a dual-output, 1+1 phase voltage regulator IC designed for IMVP-7/VR12™ CPU core power delivery. It integrates two independent 1-phase VRs with shared serial control bus, supports DCR/resistor current sensing, differential remote sensing, and delivers 0.5% system accuracy over temperature. Used in high-efficiency notebook and desktop CPU power stages.
For engineers reviewing the ISL95837HRZ-T datasheet, ISL95837HRZ-T pinout, ISL95837HRZ-T application, or ISL95837HRZ-T equivalent, key selection criteria include IMVP-7/VR12™ compliance, dual 1-phase VR architecture, programmable VBOOT/IMAX/TMAX, R3™ ripple regulation, and integrated gate drivers for compact CPU VR designs.
Technical Context
The ISL95837HRZ-T implements Intersil's Robust Ripple Regulator (R3™) PWM modulator, enabling variable switching frequency during load transients and improved light-load efficiency via automatic frequency scaling. It uses a shared SMBus-compatible serial control interface to communicate with the CPU for VID code interpretation and telemetry reporting.
Both outputs support lossless DCR current sensing with single NTC thermistor compensation or precision resistor-based sensing, and feature independent remote voltage sense inputs, programmable overcurrent (OC) thresholds, and separate Power-Good signals for robust system-level power sequencing and fault management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Type | Dual 1-phase VR (1+1 configuration only) |
| Compliance | IMVP-7/VR12™ specification compliant |
| System Accuracy | ±0.5% over full temperature range |
| Current Sensing | DCR-based (with NTC compensation) or precision resistor options |
| Voltage Sensing | Differential remote sense per output for accurate load-line regulation |
| Control Interface | SMBus-compatible serial bus for VID, telemetry, and configuration |
| Startup VBOOT | Resistor-programmable boot voltage for controlled gate drive turn-on |
Pinout & Package
ISL95837HRZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin assignment is validated per FN7671 Rev 1.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Input power supply rails | Separate input pins for each 1-phase VR stage; enable independent input decoupling |
| VOUT1, VOUT2 | Output voltage feedback nodes | Direct connection to VR output for local regulation; used with remote sense for load-line accuracy |
| SNS1+, SNS1−, SNS2+, SNS2− | Current sense differential inputs | Support DCR or resistor sensing per VR; enable accurate phase current monitoring and OC protection |
| VID0–VID4, CLK, DATA | SMBus interface signals | 5-bit VID code + clock/data lines for CPU-controlled output voltage setting and telemetry readback |
| PGOOD1, PGOOD2 | Power-good status outputs | Open-drain signals indicating stable regulation per VR; used for system power sequencing |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM modulation | Variable switching frequency during transients improves dynamic response and reduces output capacitance requirements |
| Shared serial control bus | Reduces PCB routing complexity and component count vs. dual-chip solutions |
| Programmable VBOOT | Adjustable boot voltage prevents MOSFET shoot-through during startup |
| Adaptive body diode conduction reduction | Minimizes reverse recovery losses in high-side FETs, improving efficiency at light loads |
| Independent TMAX/IMAX programming | Per-output thermal and current limit tuning enables optimized protection for asymmetric CPU/GPU VR layouts |
Applications
| Notebook CPU Core Power | Desktop VR12™ Motherboard |
|---|---|
Use Scenario: High-density ultrabook platform requiring dual-rail CPU core and GTL voltage regulation under strict thermal and space constraints. IC Role / Device Role / Timing Role: Dual 1-phase VR controller managing independent CPU core and graphics logic power domains with coordinated VID updates. Use Value: Enables IMVP-7/VR12™ compliance with minimal board area via shared serial bus and integrated gate drivers. | Use Scenario: ATX motherboard delivering precise load-line regulated voltages to multi-core desktop CPUs with discrete GPU co-location. IC Role / Device Role / Timing Role: Primary VR controller providing synchronized 1+1 phase regulation with differential remote sensing for ±0.5% output accuracy across temperature. Use Value: Supports adaptive body diode reduction and programmable VBOOT to maintain efficiency and reliability during cold-boot and transient events. |
| Embedded Thin Client | Workstation CPU Power Module |
Use Scenario: Fanless thin client with passive cooling, requiring low-noise, high-efficiency CPU power with tight thermal margin control. IC Role / Device Role / Timing Role: Dual-output VR controller implementing DCR current sensing with single NTC for real-time temperature-compensated current reporting. Use Value: Achieves 0.5% system accuracy without external DACs or calibration, reducing BOM cost and test complexity. | Use Scenario: High-performance workstation supporting overclocked CPUs with configurable IMAX/TMAX limits per rail. IC Role / Device Role / Timing Role: Configurable 1+1 VR controller enabling independent current and thermal threshold programming for CPU core and I/O domain rails. Use Value: Allows fine-grained protection tuning to match discrete FET selection and heatsink performance without firmware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 1-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95835HRZ-T | Supports 3+1, 2+1, or 1+1 configurations; includes third gate driver; higher pin count and flexibility | Used where scalable phase count is required (e.g., configurable CPU/GPU platforms) | Select ISL95835HRZ-T when design requires reconfigurable phase allocation beyond fixed 1+1 |
| RT8803AGQW | Single-chip dual 1-phase VR with VR12.0/IMVP-8 support; different SMBus command set and telemetry format | Targeted at newer VR12.0-compliant systems with updated CPU interface requirements | Select RT8803AGQW for VR12.0 migration paths requiring backward-compatible but non-drop-in replacement |
Compared with ISL95837HRZ-T, ISL95835HRZ-T offers greater architectural flexibility at higher pin count and cost, while RT8803AGQW targets next-generation VR12.0 compliance with distinct register mapping - neither is pin-compatible, requiring layout and firmware adaptation.
Availability
ISL95837HRZ-T is available at Aetrix Electronics and suitable for notebook CPU power, desktop VR12™ motherboards, and embedded thin client designs requiring stable component supply and long-term lifecycle support.
Supply support for ISL95837HRZ-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.
The ISL95837HRZ-T belongs to the IMVP-7/VR12™ CPU voltage regulator product line, engineered specifically for efficient, accurate, and standards-compliant core power delivery in x86 computing platforms.
FAQ
What is the primary function of the ISL95837HRZ-T in CPU power delivery?
The ISL95837HRZ-T serves as a dual-output, 1+1 phase voltage regulator controller for IMVP-7/VR12™ compliant CPUs. It manages two independent 1-phase VR stages using integrated gate drivers, shared SMBus communication, and precision current/voltage sensing to deliver tightly regulated core and graphics logic voltages with ±0.5% accuracy across temperature. The ISL95837HRZ-T enables compact, high-efficiency CPU power stages without external phase controllers.
Does the ISL95837HRZ-T support DCR current sensing with temperature compensation?
Yes, the ISL95837HRZ-T supports lossless DCR current sensing on both outputs using an external NTC thermistor for real-time inductor resistance compensation. This ensures accurate current measurement across temperature, critical for IMVP-7/VR12™ load-line compliance and overcurrent protection. The ISL95837HRZ-T also supports precision resistor-based sensing as an alternative method.
Is the ISL95837HRZ-T pin-compatible with the ISL95835HRZ-T?
No, the ISL95837HRZ-T is not pin-compatible with the ISL95835HRZ-T. While both share the same QFN-48 package footprint, their pin assignments differ due to the ISL95835HRZ-T's additional gate driver and configurable phase support. Board layout and firmware must be redesigned to substitute one for the other. The ISL95837HRZ-T is optimized exclusively for fixed 1+1 operation.
What serial interface does the ISL95837HRZ-T use for CPU communication?
The ISL95837HRZ-T uses a SMBus-compatible 2-wire serial interface (CLK/DATA) to communicate with the CPU for VID code interpretation, telemetry reporting (voltage, current, temperature), and configuration. It supports standard VR12™ command sets and operates at up to 400 kHz. The ISL95837HRZ-T does not require external level-shifting circuitry for typical CPU interface voltages.
Can the ISL95837HRZ-T be used in VR12.0 or IMVP-8 systems?
No, the ISL95837HRZ-T is designed specifically for IMVP-7/VR12™ compliance and does not support VR12.0 or IMVP-8 features such as adaptive voltage positioning (AVP), extended telemetry registers, or updated SMBus command protocols. For VR12.0 systems, alternatives like the RT8803AGQW are recommended. The ISL95837HRZ-T remains appropriate for legacy VR12™ platforms only.
ISL95837HRZ-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:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 2
- Voltage - Output:
- Up to 1.52V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (5x5)
ISL95837HRZ-T FAQ
1.How can I place an order for ISL95837HRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95837HRZ-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 ISL95837HRZ-T reliable?
The price and inventory of ISL95837HRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95837HRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95837HRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95837HRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95837HRZ-T?
ISL95837HRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95837HRZ-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 ISL95837HRZ-T?
For technical support, including ISL95837HRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95837HRZ-T requirements.
6.How does Aetrix verify that ISL95837HRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95837HRZ-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 ISL95837HRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95837HRZ-T?
All ISL95837HRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95837HRZ-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 ISL95837HRZ-T part is unused and in its original packaging.
Return procedure for ISL95837HRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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