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Renesas ISL95813HRZ
- Part No.:
- ISL95813HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL95813HRZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,995
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Product details
Overview
ISL95813HRZ from Renesas (formerly Intersil) is a single-phase VR12.6 core controller IC for Intel microprocessor voltage regulation, featuring R3™ PWM modulation, 4.6V–25V input range, digitally selectable switching frequencies (425/550/700kHz), and DCR current sensing with single NTC thermal compensation. It delivers tightly regulated output voltage via high-speed serial bus interface with CPU for real-time load current and VR temperature monitoring in notebook power delivery systems.
For engineers reviewing the ISL95813HRZ datasheet, ISL95813HRZ pinout, ISL95813HRZ application, or ISL95813HRZ equivalent, key selection criteria include VR12.6 compliance, R3™ transient response performance, IMON/VRHOT# protection signaling, differential remote sensing capability, and 20-lead 3mm×4mm QFN package integration with ECO/PRO light-load modes.
Technical Context
The ISL95813HRZ implements a variable-frequency R3™ control architecture that enables natural period stretching in Discontinuous Conduction Mode (DCM) to improve light-load efficiency. Its serial bus interface supports bidirectional communication with Intel CPUs for dynamic voltage programming and telemetry reporting including load current and VR temperature.
It integrates dual current sensing options-DCR-based with single NTC compensation and discrete resistor-based-and provides programmable parameters including boot voltage, IMAX, TMAX, voltage slew rate, and switching frequency via SCLK/SDA/ALERT#/PGRM1/PGRM2 pins. Differential remote feedback ensures precise load-point regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 25V - supports wide-input notebook adapter and battery rail operation without external pre-regulation. |
| Output Compliance | VR12.6 specification - enables direct use with Intel 3rd–5th gen Core processors requiring serial VID interface and telemetry. |
| Switching Frequency | 425/550/700kHz with ECO/PRO options - selectable via pins to balance efficiency vs. transient response and EMI filtering requirements. |
| Current Sensing | DCR + single NTC or discrete resistor - enables accurate, temperature-compensated load current measurement for IMON and overcurrent protection. |
| Package | 20-lead 3mm×4mm QFN with exposed thermal pad - provides low-inductance layout, compact footprint, and efficient thermal dissipation for high-density PCBs. |
| Protection Features | VRHOT# assertion, PGOOD monitoring, and enable control - delivers coordinated CPU-safe shutdown and system-level fault signaling. |
Pinout & Package
ISL95813HRZ is housed in a 20-lead 3mm×4mm QFN package with exposed E-pad (GND). Pin functions are validated per Figure 1 of FN8449 Rev 2.00 and confirmed on Renesas official product page.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,20 (E-PAD) | GND | Thermal and electrical ground reference; must be soldered to large PCB copper area for thermal management. |
| 2 (VRHOT#) | Open-drain fault indicator | Asserts low when VR temperature exceeds TMAX; signals CPU to throttle or shut down. |
| 3 (NTC) | Thermal sensor input | Connects to single NTC thermistor for DCR current sense temperature compensation. |
| 4 (VR_ON) | Enable control input | Active-high logic input enabling VR operation; synchronized with CPU power sequencing. |
| 5 (IMON) | Analog current monitor output | Provides voltage proportional to load current; used for telemetry and OCP calibration. |
| 6 (PGOOD) | Power-good status output | Open-drain signal indicating regulated output is within ±1% tolerance and stable. |
| 7 (COMP) | Error amplifier compensation | Connects external RC network to set loop stability and transient response characteristics. |
| 8 (FB) | Differential remote sense input (+) | High-impedance input for precision feedback from CPU VCC point; rejects PCB IR drop. |
| 9 (RTN) | Differential remote sense input (−) | Return path for FB; completes Kelvin sense pair to eliminate trace resistance error. |
| 10 (ISUMN) | Current sense sum node (−) | Inverting input for DCR or resistor-based current sensing amplifier. |
| 11 (ISUMP) | Current sense sum node (+) | Non-inverting input for DCR or resistor-based current sensing amplifier. |
| 12 (LG) | Low-side gate driver output | Drives external low-side MOSFET gate; optimized for fast turn-on/turn-off with shoot-through prevention. |
| 13 (PHASE) | Switch node | Connects to external high-side and low-side MOSFET drains; carries high di/dt switching current. |
| 14 (UG) | High-side gate driver output | Drives external high-side MOSFET gate via bootstrap circuit; supports 100% duty cycle operation. |
| 15 (BOOT) | Bootstrap capacitor connection | Connects to flying capacitor between UG and PHASE; enables high-side NMOS drive above VIN. |
| 16 (VCC) | Bias supply input | Internal LDO input; accepts 4.6V–25V; powers internal circuitry and gate drivers. |
| 17 (PGRM2) | Frequency select input | Logic input selecting 425kHz (low), 550kHz (high), or 700kHz (both high) with ECO/PRO mode. |
| 18 (SCLK) | Serial clock input | Accepts 2MHz–10MHz clock from CPU for VR12.6 serial VID and telemetry interface. |
| 19 (ALERT#) | Serial bus interrupt output | Open-drain alert signal notifying CPU of VR events (e.g., overtemp, overcurrent). |
| 18 (SDA) | Serial data I/O | Bidirectional data line for VR12.6 serial bus; supports read/write of VR registers and telemetry. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator control | Delivers faster transient response and smoother power state transitions than conventional voltage-mode or current-mode PWM. |
| Dual current sensing architecture | Supports either DCR sensing with single NTC compensation or discrete resistor sensing - simplifies BOM and layout flexibility. |
| Programmable VR parameters | Boot voltage, IMAX, TMAX, voltage slew rate, and switching frequency are user-configurable via pins or serial bus - enables system-specific tuning. |
| Differential remote voltage sensing | Eliminates PCB trace IR drop error by measuring voltage directly at CPU power pins - ensures ±0.5% regulation accuracy at load. |
| VRHOT# and IMON telemetry | Provides real-time thermal and current data to CPU for adaptive power management and safe operating area enforcement. |
Applications
| Notebook CPU Power Delivery | Ultrabook VR12.6 Regulation |
|---|---|
Use Scenario: Primary core voltage regulator for Intel Core i5/i7 mobile processors in 13–15" clamshell notebooks with dual-cell Li-ion battery and AC adapter input. IC Role / Device Role / Timing Role: Single-phase VR12.6 core controller managing high-efficiency buck conversion, serial VID interface, and real-time telemetry exchange with CPU. Use Value: Enables dynamic voltage scaling, rapid load transients (<10µs response), and thermal-aware throttling using IMON and VRHOT# signals. | Use Scenario: Compact, high-density voltage regulator for ultrabook platforms requiring sub-10mm board height and <2W no-load power. IC Role / Device Role / Timing Role: Core controller implementing ECO-mode DCM for >85% efficiency at 10mA load and PRO-mode for full-load transient performance. Use Value: Reduces standby power consumption while maintaining VR12.6 compliance and CPU-specified voltage accuracy across temperature. |
| Tablet SoC Power Management | All-in-One Desktop VR Interface |
Use Scenario: Power delivery solution for Intel Atom or Core M-series SoCs in fanless tablets with thermal constraints and battery life targets >10 hours. IC Role / Device Role / Timing Role: Single-phase controller providing differential remote sensing, NTC-based thermal compensation, and VRHOT#-triggered CPU thermal mitigation. Use Value: Maintains stable 0.7–1.4V output under varying ambient temperature (0°C–70°C) without derating or forced cooling. | Use Scenario: VR12.6-compliant core regulator in AIO desktops where space-constrained motherboard layout requires minimal external components and small QFN footprint. IC Role / Device Role / Timing Role: Controller interfacing with CPU via SCLK/SDA/ALERT# to support BIOS-controlled voltage margining and real-time diagnostics. Use Value: Allows OEMs to implement factory calibration, field firmware updates, and predictive failure analysis using serial bus telemetry data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR12.6 core controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95815HRZ | Two-phase VR12.6 controller with identical pinout and feature set; supports higher output current (up to 60A) via phase interleaving. | Required for CPU loads exceeding 40A or where thermal spreading across two phases improves reliability. | Select ISL95815HRZ only when dual-phase layout and higher current capability are needed; not a drop-in replacement for single-phase designs. |
| RT8803AZQW | Single-phase VR12.6 controller with integrated MOSFET drivers but no native NTC compensation; uses external ADC for thermal monitoring. | Suitable for cost-sensitive designs where discrete NTC compensation is omitted and thermal protection is handled externally. | Choose RT8803AZQW when board space allows larger external thermal sensing circuitry and lower BOM cost outweighs integrated NTC support. |
Compared with ISL95813HRZ, ISL95815HRZ adds phase-interleaved current handling but increases layout complexity, while RT8803AZQW reduces integration depth and requires external thermal path design - making ISL95813HRZ optimal for balanced performance, integration, and thermal accuracy in 40A-class notebooks.
Availability
ISL95813HRZ is available at Aetrix Electronics and suitable for notebook computers, ultrabooks, and all-in-one desktops requiring stable component supply, VR12.6 compliance, and long-term industrial lifecycle support.
Supply support for ISL95813HRZ 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 (formerly Intersil) is a global semiconductor leader specializing in analog, power, and embedded processing solutions for industrial, automotive, and computing markets.
The ISL95813HRZ belongs to Renesas' VR12.x core controller product line, designed specifically to meet Intel's stringent voltage regulation, telemetry, and power-state transition requirements for mobile and desktop microprocessors.
FAQ
What is the primary function of the ISL95813HRZ in a CPU power delivery system?
The ISL95813HRZ serves as a single-phase VR12.6 core controller that regulates the CPU core voltage using a buck topology, communicates with Intel processors via a high-speed serial bus for dynamic voltage programming, and reports real-time telemetry including load current and VR temperature. Its R3™ control architecture ensures fast transient response essential for modern CPU power states. The ISL95813HRZ is specifically engineered for this role in mobile and compact desktop platforms.
Does the ISL95813HRZ support both DCR and discrete resistor current sensing?
Yes, the ISL95813HRZ supports dual current sensing methods: DCR sensing with single NTC thermal compensation for accurate, low-component-count implementation, and discrete resistor sensing for applications requiring higher precision or where PCB layout constraints prevent accurate DCR measurement. Both modes are hardware-selectable and fully supported in the ISL95813HRZ datasheet and application circuits.
What package type and thermal characteristics does the ISL95813HRZ use?
The ISL95813HRZ uses a 20-lead 3mm×4mm QFN package with an exposed thermal pad (E-PAD) connected to GND. This package enables efficient heat transfer to the PCB, supporting continuous operation at up to 40A output current with proper copper pour and thermal vias. The ISL95813HRZ thermal design is validated in AN1846 and referenced in the FN8449 datasheet.
How does the ISL95813HRZ implement light-load efficiency optimization?
The ISL95813HRZ achieves enhanced light-load efficiency through its variable-frequency R3™ topology, which enables natural period stretching into Discontinuous Conduction Mode (DCM). This reduces switching losses at low output currents. ECO and PRO frequency options allow designers to tune the trade-off between efficiency and transient response. The ISL95813HRZ maintains VR12.6 compliance throughout this operation.
Is the ISL95813HRZ compatible with Intel's VR12.6 specification for serial VID and telemetry?
Yes, the ISL95813HRZ is fully compliant with Intel's VR12.6 specification, supporting the required 2-wire serial interface (SCLK/SDA) for bidirectional communication, including voltage setting, IMON reporting, VR temperature reading, and VRHOT# assertion. All timing, protocol, and register mapping details for VR12.6 are implemented per the ISL95813HRZ datasheet FN8449 Rev 2.00.
ISL95813HRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.6
- Voltage - Input:
- 4.6V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
ISL95813HRZ FAQ
1.How can I place an order for ISL95813HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95813HRZ 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 ISL95813HRZ reliable?
The price and inventory of ISL95813HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95813HRZ is usually 5 days.
3.What payment methods are accepted for ISL95813HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95813HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95813HRZ?
ISL95813HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95813HRZ 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 ISL95813HRZ?
For technical support, including ISL95813HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95813HRZ requirements.
6.How does Aetrix verify that ISL95813HRZ is sourced from the original manufacturer or authorized distributors?
All ISL95813HRZ 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 ISL95813HRZ meets industry standards.
7.What is the process for return or replacement of ISL95813HRZ?
All ISL95813HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95813HRZ, 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 ISL95813HRZ part is unused and in its original packaging.
Return procedure for ISL95813HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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