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Renesas ISL95813IRZ-T
- Part No.:
- ISL95813IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL95813IRZ-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,706
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Product details
Overview
ISL95813IRZ-T from Renesas Electronics (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.
For engineers reviewing the ISL95813IRZ-T datasheet, ISL95813IRZ-T pinout, ISL95813IRZ-T application, or ISL95813IRZ-T equivalent, key selection criteria include VR12.6 compliance, R3™ transient response performance, IMON/VRHOT# protection signaling, differential remote sensing capability, and QFN-20 3mm×4mm package integration for space-constrained mobile CPU VR designs.
Technical Context
The ISL95813IRZ-T 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.
This controller integrates differential remote voltage feedback, programmable boot voltage, IMAX/TMAX limits, voltage transition slew rate, and switching frequency selection via PRGM1/PRGM2 pins. It supports both DCR and discrete resistor current sensing paths with single-point NTC thermal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 25V - supports wide-input notebook adapter and battery supply rails without external pre-regulation. |
| Output Compliance | VR12.6 specification - ensures full interoperability with Intel 3rd/4th Gen Core processors and compatible VRD requirements. |
| Switching Frequency | 425/550/700kHz (ECO/PRO options) - user-selectable via PRGM1/PRGM2 pins to optimize efficiency vs. EMI trade-offs. |
| Current Sensing | DCR + single NTC compensation - enables accurate inductor DCR-based current measurement with temperature drift correction. |
| Package | 20-pin QFN, 3mm × 4mm - ultra-compact footprint for high-density mobile VR layouts with exposed thermal pad (E-PAD). |
| Protection Features | VRHOT# assertion and IMON output - provides CPU-triggered thermal shutdown signaling and analog current monitor for system-level fault logging. |
| Interface | Serial bus (SCLK/SDA/ALERT#) - bidirectional communication channel for dynamic voltage scaling and real-time VR telemetry to CPU. |
Pinout & Package
ISL95813IRZ-T is housed in a 20-lead, 3mm × 4mm, 0.5mm pitch QFN package with exposed thermal pad (E-PAD) connected to GND for enhanced thermal dissipation in high-current VR applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3,4,6,16,15,14,13,11,12,7,8,9,10,20,19,18,17 | GND / E-PAD | Power and signal ground reference plane; E-PAD must be soldered to PCB thermal pad for thermal management. |
| 5 | VRHOT# | Open-drain thermal alert output asserted low when VR internal temperature exceeds TMAX threshold. |
| 11 | IMON | Analog current monitor output proportional to load current, scaled for system telemetry and fault detection. |
| 12 | PGOOD | Open-drain power-good indicator signaling valid output voltage within regulation window. |
| 13 | COMP | Control loop compensation node for external Type II/III compensation network. |
| 14 | FB | Differential remote sense input for precise output voltage regulation at CPU VCC point. |
| 15 | RTN | Remote sense return path - connects to CPU VSS for Kelvin sensing accuracy. |
| 16 | ISUMN | Negative current sense input for DCR or resistor-based current sensing configuration. |
| 17 | ISUMP | Positive current sense input for DCR or resistor-based current sensing configuration. |
| 18 | LG | Low-side gate driver output - drives external low-side MOSFET in synchronous buck topology. |
| 19 | PHASE | Phase node connection - ties to switch node between high- and low-side MOSFETs. |
| 20 | UG | High-side gate driver output - drives external high-side MOSFET with bootstrap circuitry. |
| 1 | BOOT | Bootstrap capacitor connection for high-side gate driver floating supply. |
| 2 | VCC | Internal LDO input - powers internal circuitry from VIN or auxiliary supply (min. 4.6V). |
| 3 | PGRM2 | Frequency select input - sets switching frequency with PGRM1 per VR12.6 mode table. |
| 4 | SCLK | Serial clock input for VR-CPU communication bus (I²C-compatible timing). |
| 6 | ALERT# | Asynchronous interrupt output from CPU to VR for urgent events (e.g., VRHOT#, overcurrent). |
| 7 | SDA | Serial data I/O line for bidirectional VR-CPU telemetry and command exchange. |
| 8 | PRGM1 | Frequency select input - used with PGRM2 to configure 425/550/700kHz operation. |
| 9 | LOUT | Low-side gate driver output - alternate naming for LG pin (same function). |
| 10 | COUT | Output capacitor connection point - not a pin; label on schematic indicating VR output node. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Robust Ripple Regulator control | Enables sub-1µs transient response and fast power-state transitions without external compensation tuning. |
| Differential remote voltage sensing | Eliminates IR drop error by measuring voltage directly at CPU VCC/VSS pins, ensuring ±0.5% regulation accuracy. |
| Digitally programmable parameters | Boot voltage, IMAX, TMAX, slew rate and switching frequency configured via serial bus or hardware pins. |
| VRHOT# and IMON outputs | Provides CPU-accessible thermal and current telemetry for adaptive power management and fault diagnostics. |
| Discontinuous Conduction Mode (DCM) | Automatically engages at light loads to reduce switching losses and maintain >85% efficiency down to 100mA output. |
Applications
| Notebook CPU Power Delivery | Ultrabook VR12.6 Regulation |
|---|---|
Use Scenario: Primary core voltage regulator for Intel Core i5/i7 processors in 14–15.6" notebooks with dual-cell Li-ion battery and AC adapter input. IC Role / Device Role / Timing Role: Single-phase VR12.6 core controller managing synchronous buck conversion, telemetry exchange, and thermal protection. Use Value: Enables dynamic voltage/frequency scaling (DVFS) support and real-time load monitoring required by Intel SpeedStep technology. | Use Scenario: Compact VR solution for fanless ultrabooks requiring high power density and low acoustic noise. IC Role / Device Role / Timing Role: Core controller implementing R3™ modulation and DCM for efficient light-load operation during idle/sleep states. Use Value: Delivers >90% peak efficiency and <15mV output ripple while fitting within 3mm × 4mm board area constraints. |
| Tablet SoC Voltage Regulation | All-in-One Desktop VR |
Use Scenario: High-efficiency CPU VR in 10–12" Windows tablets with limited thermal headroom and battery runtime targets. IC Role / Device Role / Timing Role: VR12.6-compliant controller using DCR sensing and NTC compensation to maintain accuracy across operating temperature range. Use Value: Reduces thermal sensor count and simplifies layout by integrating single-point thermal compensation into current sense path. | Use Scenario: Main processor VR in space-constrained AIO desktops where motherboard layer count and component height are limited. IC Role / Device Role / Timing Role: Single-phase controller driving external MOSFETs with differential remote sensing to compensate for PCB trace resistance. Use Value: Ensures stable 1.0–1.4V core voltage delivery under 40A peak load with <±3mV regulation error at CPU die. |
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 |
|---|---|---|---|
| ISL95815IRZ-T | Dual-phase VR12.6 controller with identical pinout and feature set; supports up to 60A total output via phase interleaving. | Required for higher-current CPU platforms (e.g., quad-core mobile H-series) where single-phase current limit is exceeded. | Select ISL95815IRZ-T when total output current exceeds 40A or interleaved ripple reduction is needed. |
| RT8803GQW | Single-phase VR12.6 controller with integrated MOSFET drivers but no serial bus telemetry; uses analog VID inputs instead of SDA/SCLK. | Suitable for cost-sensitive designs lacking CPU telemetry requirements or where VR-CPU serial interface is unused. | Choose RT8803GQW only if VRHOT#/IMON telemetry and dynamic voltage programming are not required. |
Compared with ISL95813IRZ-T, ISL95815IRZ-T scales current capacity via dual-phase operation while retaining full compatibility, whereas RT8803GQW omits serial telemetry and relies on static VID encoding-making it appropriate only for non-telemetry VR12.6 implementations.
Availability
ISL95813IRZ-T is available at Aetrix Electronics and suitable for notebook computers, ultrabooks, tablets, and all-in-one desktops requiring stable component supply, VR12.6 compliance, and real-time CPU telemetry support.
Supply support for ISL95813IRZ-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 is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and computing markets.
The ISL95813IRZ-T belongs to Renesas' high-performance VR12.x core controller product line, designed specifically for Intel CPU voltage regulation with emphasis on transient response, telemetry integration, and compact mobile form factors.
FAQ
What is the primary function of the ISL95813IRZ-T in a CPU power delivery system?
The ISL95813IRZ-T serves as a single-phase VR12.6-compliant core controller that regulates the CPU's core voltage using synchronous buck topology. It communicates with the Intel processor via serial bus to receive voltage commands and report real-time load current and temperature. The ISL95813IRZ-T implements R3™ modulation for fast transient response and supports DCR current sensing with NTC compensation to ensure accuracy across temperature.
Does the ISL95813IRZ-T support differential remote voltage sensing?
Yes, the ISL95813IRZ-T supports true differential remote voltage sensing using dedicated FB and RTN pins. This allows the ISL95813IRZ-T to measure voltage directly at the CPU's VCC and VSS terminals, eliminating PCB trace IR drop errors and maintaining tight regulation accuracy (±0.5%) even under high-current transients.
How is switching frequency selected on the ISL95813IRZ-T?
Switching frequency on the ISL95813IRZ-T is selected using two hardware pins: PGRM1 and PGRM2. These pins configure one of three fixed frequencies - 425kHz, 550kHz, or 700kHz - with ECO and PRO modes determining optimal light-load or high-efficiency operation. The ISL95813IRZ-T does not support continuous frequency tuning; selection is discrete and set at power-up.
What protection features are integrated into the ISL95813IRZ-T?
The ISL95813IRZ-T integrates VRHOT# thermal alert output, IMON analog current monitor, PGOOD status indication, and overcurrent/overvoltage protection triggered via its current-sense amplifier. VRHOT# asserts low when internal temperature exceeds the programmed TMAX threshold, enabling immediate CPU-initiated throttling. All protections are configurable via serial bus or hardware straps.
Can the ISL95813IRZ-T operate without an external NTC thermistor?
Yes, the ISL95813IRZ-T supports both DCR current sensing with optional single NTC compensation and discrete resistor current sensing without thermal compensation. If NTC is omitted, the ISL95813IRZ-T defaults to fixed-gain current sensing; however, temperature-induced DCR drift will reduce current measurement accuracy above 60°C unless compensated externally.
ISL95813IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
ISL95813IRZ-T FAQ
1.How can I place an order for ISL95813IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95813IRZ-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 ISL95813IRZ-T reliable?
The price and inventory of ISL95813IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95813IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95813IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95813IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95813IRZ-T?
ISL95813IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95813IRZ-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 ISL95813IRZ-T?
For technical support, including ISL95813IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95813IRZ-T requirements.
6.How does Aetrix verify that ISL95813IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95813IRZ-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 ISL95813IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95813IRZ-T?
All ISL95813IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95813IRZ-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 ISL95813IRZ-T part is unused and in its original packaging.
Return procedure for ISL95813IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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