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Renesas ISL95820CRTZ-T
- Part No.:
- ISL95820CRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95820CRTZ-T.pdf
- Description:
- IC REG CTRLR VR12.5 1OUT 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,647
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Product details
Overview
ISL95820CRTZ-T from Renesas (formerly Intersil) is a green hybrid digital four-phase PWM controller IC designed for Intel VR12.5™ CPU core voltage regulation. It integrates three gate drivers, supports 1–4 phase operation, implements R3™ modulator technology, delivers 0.5% system voltage accuracy over temperature, and enables diode emulation for high light-load efficiency in single-phase mode.
For engineers reviewing the ISL95820CRTZ-T datasheet, ISL95820CRTZ-T pinout, ISL95820CRTZ-T application, or ISL95820CRTZ-T equivalent, key selection considerations include VR12.5 serial bus compliance (SVID), DCR/resistor current sensing flexibility, programmable IMAX and slew rate, phase shedding capability, and R3™-based transient response performance.
Technical Context
The ISL95820CRTZ-T implements a digital hybrid R3™ modulator architecture that dynamically adjusts switching frequency during load transients and enables phase shedding across 1–4 output phases. It communicates with Intel CPUs via SVID-compliant SMBus/PMBus interface and supports both lossless DCR sensing (with single NTC thermistor compensation) and precision resistor-based current sensing.
It provides differential remote voltage sensing, programmable VBOOT startup voltage, adjustable overcurrent protection thresholds, and adaptive body diode conduction time reduction. The controller generates a Power-Good signal and operates with integrated gate drivers eliminating need for external driver ICs in standard VR designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V VIN - supports wide-input VR designs compatible with ATX 12V rail and auxiliary supplies. |
| Output Phase Support | Configurable 1-, 2-, 3-, or 4-phase operation - enables scalable power delivery matching CPU TDP requirements without hardware change. |
| Voltage Accuracy | ±0.5% over temperature - ensures tight core voltage regulation critical for VR12.5 CPU stability and performance margin. |
| Current Sensing | DCR sensing with NTC compensation OR precision resistor sensing - allows optimization of cost vs. accuracy in production VR layouts. |
| R3™ Modulator | Variable-frequency control with diode emulation - improves light-load efficiency and accelerates transient recovery without external compensation. |
| SVID Interface | SMBus/PMBus/I²C compliant, conflict-free - enables direct communication with Intel CPUs for dynamic VID updates and telemetry reporting. |
Pinout & Package
ISL95820CRTZ-T is housed in a 40-pin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad. Pin assignment follows Intersil's standard VR controller layout optimized for four-phase interleaved buck topologies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN4 | High-side MOSFET supply inputs | Four independent bootstrap supply inputs supporting up to four external high-side FETs in multi-phase configuration. |
| PHASE1–PHASE4 | Gate drive outputs | Four dedicated gate drive outputs; internal logic configures active phases based on SVID command and load conditions. |
| VSNSP/VSNSN | Differential remote sense inputs | Enables Kelvin sensing at CPU socket to eliminate PCB IR drop error in core voltage regulation. |
| SCL/SDA | SVID serial bus interface | Direct connection to CPU SVID bus for dynamic voltage identification, telemetry, and fault reporting per VR12.5 spec. |
| PGOOD | Power-good status output | Open-drain signal asserted when output voltage is within ±5% of target and all protections are inactive. |
Key Features
| Feature | Design Value |
|---|---|
| Green Hybrid Digital R3™ Modulator | Delivers faster transient response and variable-frequency operation-reducing output capacitance needs and improving light-load efficiency via diode emulation. |
| Configurable Phase Count (1–4) | Enables single PCB design reuse across multiple CPU SKUs by software-selecting active phases without hardware modification. |
| DCR + NTC Temperature Compensation | Eliminates need for current-sense resistors while maintaining accuracy across temperature-reducing BOM cost and board space. |
| Programmable IMAX & Slew Rate | Allows tuning of current limit threshold and voltage transition speed to match specific CPU load-line and thermal constraints. |
| Adaptive Body Diode Conduction Reduction | Minimizes shoot-through and conduction losses in synchronous buck stages-improving overall VR efficiency at medium loads. |
Applications
| Desktop CPU Core VR | VR12.5-Compliant Motherboard |
|---|---|
Use Scenario: Primary core voltage regulator on Intel LGA1150/LGA1155 desktop motherboards requiring VR12.5 compliance. IC Role / Device Role / Timing Role: Four-phase PWM controller managing synchronous buck stages, communicating with CPU via SVID bus for dynamic VID adjustment. Use Value: Enables precise 0.5% voltage regulation and fast transient response required for Haswell/Broadwell CPU power states. | Use Scenario: Integrated VR solution on ATX/mATX motherboard VRM sections where space and thermal density are constrained. IC Role / Device Role / Timing Role: Central digital controller coordinating gate drivers, current sensing, and telemetry for full VR subsystem. Use Value: Reduces component count via integrated drivers and eliminates external compensation networks using R3™ architecture. |
| Multi-Phase Server VR Module | High-Efficiency VR Reference Design |
Use Scenario: Scalable VR module used in entry-level dual-CPU workstations supporting VR12.5-compatible processors. IC Role / Device Role / Timing Role: Configurable 4-phase controller enabling phase shedding to match CPU P-state transitions and reduce idle power. Use Value: Achieves >90% peak efficiency and <50µs load-step recovery due to R3™ modulator and adaptive body diode control. | Use Scenario: Reference platform for evaluating VR12.5 compliance, including SVID handshake, telemetry logging, and thermal derating behavior. IC Role / Device Role / Timing Role: Programmable controller demonstrating DCR sensing calibration, IMAX tuning, and VBOOT sequencing per Intel specification. Use Value: Provides validated starting point for VR firmware development and hardware validation with documented register maps and timing sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | Supports VR12/VR12.5; uses analog-based DC-DC control with digital interface; no R3™ modulator; requires external drivers. | Lacks integrated gate drivers and diode emulation; lower light-load efficiency; higher external component count. | Preferred where legacy analog control familiarity or existing IR35xx reference designs exist; not drop-in compatible. |
| RT8803AZSP | VR12.5-compliant; 4-phase digital controller; includes integrated drivers; uses proprietary digital modulator (not R3™); different SVID register mapping. | Similar integration level but distinct register interface and thermal management behavior; requires firmware adaptation. | Considered for new designs prioritizing vendor diversification; requires full SVID stack revalidation. |
Compared with IR35201MTRPBF and RT8803AZSP, the ISL95820CRTZ-T offers superior light-load efficiency via R3™ diode emulation, tighter voltage accuracy (±0.5%), and native support for DCR+NTC compensation-reducing BOM cost and simplifying thermal design in high-volume desktop VRMs.
Availability
ISL95820CRTZ-T is available at Aetrix Electronics and suitable for desktop motherboard VRMs, Intel CPU power delivery systems, and VR12.5-compliant reference designs requiring stable component supply and long-term lifecycle support.
Supply support for ISL95820CRTZ-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. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and computing markets.
The ISL95820CRTZ-T belongs to Renesas' VR controller product line, engineered specifically for Intel VR12.5-compliant CPU core power delivery with emphasis on efficiency, accuracy, and SVID interoperability.
FAQ
What is the primary function of the ISL95820CRTZ-T in a CPU power delivery system?
The ISL95820CRTZ-T serves as a digital four-phase PWM controller that regulates core voltage for Intel VR12.5™ CPUs. It manages gate drivers, senses current via DCR or resistors, communicates with the CPU over SVID, and implements R3™ modulation to ensure fast transient response and high efficiency. Its role is central to maintaining stable, accurate VCORE under dynamic CPU load conditions.
Does the ISL95820CRTZ-T require external gate drivers?
No, the ISL95820CRTZ-T integrates three gate drivers capable of directly driving high-side and low-side MOSFETs in up to four-phase configurations. This eliminates the need for external driver ICs in standard implementations, reducing component count and layout complexity. The ISL95820CRTZ-T datasheet confirms driver output capability rated for typical VR gate charge requirements.
How does the R3™ modulator in the ISL95820CRTZ-T improve VR performance?
The R3™ modulator in the ISL95820CRTZ-T enables variable switching frequency, phase shedding, and diode emulation-resulting in faster transient response, reduced output capacitance requirements, and improved light-load efficiency. Unlike fixed-frequency controllers, the ISL95820CRTZ-T dynamically adapts frequency and active phases to match real-time CPU load, directly enhancing VR efficiency and stability.
Can the ISL95820CRTZ-T support both DCR and resistor-based current sensing?
Yes, the ISL95820CRTZ-T supports dual current sensing methods: lossless DCR sensing with single NTC thermistor compensation for cost-sensitive designs, and precision resistor sensing for higher accuracy applications. Configuration is determined by external component selection and register settings-both modes are fully supported in the ISL95820CRTZ-T datasheet and validated in reference schematics.
What package type and pin count does the ISL95820CRTZ-T use?
The ISL95820CRTZ-T uses a 40-pin QFN package measuring 6mm × 6mm with 0.5mm pitch and an exposed thermal pad. This compact, thermally enhanced package is specified in the official Renesas datasheet and matches footprint requirements for high-density VRM layouts on modern desktop motherboards.
ISL95820CRTZ-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:
- Active
- Applications:
- Controller, Intel VR12.5
- Voltage - Input:
- 4.5V ~ 20V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.5V ~ 2.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (5x5)
ISL95820CRTZ-T FAQ
1.How can I place an order for ISL95820CRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95820CRTZ-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 ISL95820CRTZ-T reliable?
The price and inventory of ISL95820CRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95820CRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL95820CRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95820CRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95820CRTZ-T?
ISL95820CRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95820CRTZ-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 ISL95820CRTZ-T?
For technical support, including ISL95820CRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95820CRTZ-T requirements.
6.How does Aetrix verify that ISL95820CRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95820CRTZ-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 ISL95820CRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL95820CRTZ-T?
All ISL95820CRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95820CRTZ-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 ISL95820CRTZ-T part is unused and in its original packaging.
Return procedure for ISL95820CRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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