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Renesas ISL95816IRZ-T
- Part No.:
- ISL95816IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95816IRZ-T.pdf
- Description:
- IC REG CTRLR VR12.5 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
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Product details
Overview
ISL95816IRZ-T from Renesas (formerly Intersil) is a 4-phase VR12.5-compliant PWM controller IC for microprocessor core voltage regulation, featuring R3 modulator architecture, 0.5% system accuracy over temperature, programmable switching frequency (200–1000 kHz), and support for DCR or resistor-based current sensing.
For engineers reviewing the ISL95816IRZ-T datasheet, ISL95816IRZ-T pinout, ISL95816IRZ-T application, or ISL95816IRZ-T equivalent, key selection considerations include VR12.5 serial bus compliance, phase configurability (1–4 phases), adaptive body diode conduction control, remote differential voltage sensing, and IMAX/VBOOT/slew rate programmability via external resistors.
Technical Context
The ISL95816IRZ-T implements Intersil's Robust Ripple Regulator (R3) Technology™, enabling variable-frequency operation during load transients to improve transient response and light-load efficiency. It communicates with VR12.5 CPUs via a serial control bus (SVID) for dynamic voltage identification and power-state coordination.
It supports dual current-sensing methods: lossless inductor DCR sensing with single NTC thermistor compensation, or precision shunt resistor sensing. Voltage regulation includes differential remote sense, programmable VBOOT (0.7–1.2 V), and adjustable overcurrent protection threshold with adaptive body diode conduction time reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR Standard | VR12.5 compliant - enables direct SVID interface with Intel® Core™ i-series and Xeon® processors for dynamic VID updates and PSx state management. |
| Phase Configurability | 1-, 2-, 3-, or 4-phase operation - allows scalable power delivery design across notebook, desktop, and workstation CPU platforms. |
| System Accuracy | ±0.5% over temperature - ensures tight core voltage regulation under thermal stress, critical for high-performance CPU stability. |
| Switching Frequency | 200–1000 kHz (resistor-programmable) - balances efficiency, component size, and EMI performance across input voltage ranges (6–19 V). |
| Current Sensing | DCR or resistor-based - supports cost-optimized DCR sensing with NTC compensation or higher-precision shunt sensing for accurate IMAX setting. |
| Voltage Sensing | Differential remote sense - rejects PCB IR drop to maintain accurate core voltage at CPU pads under high-current conditions. |
Pinout & Package
ISL95816IRZ-T is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95816 datasheet (FN7979 Rev 0.00) and validated for VR12.5 reference designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5–25 V input; powers internal circuitry and gate drivers; requires local bulk and ceramic decoupling. |
| VDD | Bias supply | Internal LDO input; typically tied to +5 V rail for stable logic and analog reference operation. |
| PHASE1–PHASE4 | Phase driver outputs | Four independent high-side/low-side gate drive outputs; each controls one buck phase power stage. |
| SVID_DATA / SVID_CLK | Serial VID interface | Two-wire SVID bus for bidirectional communication with CPU - delivers VID codes, receives PSx commands, reports faults. |
| IMON | Current monitor output | Analog voltage proportional to total output current - used for system-level current reporting and OCP calibration. |
| PGOOD | Power-Good signal | Open-drain output asserting when VOUT is within ±5% of target and all protections are inactive. |
Key Features
| Feature | Design Value |
|---|---|
| R3 Modulator Architecture | Enables variable-frequency operation during transients - reduces output voltage deviation by >40% vs. fixed-frequency PWM under 10 A/µs load steps. |
| Adaptive Body Diode Conduction Control | Minimizes reverse recovery losses in low-side MOSFETs - improves efficiency by up to 1.2% at 20% load in 4-phase configuration. |
| Programmable VBOOT Voltage | Adjustable startup bootstrap voltage (0.7–1.2 V) - optimizes high-side gate drive strength for diverse MOSFET RDS(on) and Qg requirements. |
| Resistor-Programmable Parameters | IMAX, slew rate, switching frequency, and VBOOT set via external resistors - eliminates need for EEPROM or digital interface during board bring-up. |
| Differential Remote Voltage Sense | Compensates for PCB trace resistance up to 20 mΩ - maintains ±3 mV regulation accuracy at CPU die under 100 A load. |
Applications
| Notebook CPU Core VR | Desktop High-Performance VR |
|---|---|
Use Scenario: Core voltage regulation for Intel Core i7/i9 mobile processors in thin-and-light notebooks with strict thermal and space constraints. IC Role / Device Role / Timing Role: Primary VR12.5 PWM controller managing 4-phase buck conversion, SVID handshake, and dynamic voltage scaling. Use Value: R3 modulator enables fast transient response (<10 µs) to handle burst workloads without undershoot, while DCR sensing reduces BOM count and board area. | Use Scenario: Multi-phase core VR for overclocked desktop CPUs requiring precise load-line regulation and high-current capability (>120 A). IC Role / Device Role / Timing Role: Configurable 4-phase controller with differential remote sense and programmable slew rate to meet Intel VR12.5 load-line specifications (ΔV = −m × IOUT). Use Value: ±0.5% system accuracy and adjustable IMAX ensure stable operation across ambient temperatures from −10°C to +85°C. |
| Workstation Processor VR | Embedded Xeon Scalable Platform |
Use Scenario: Power delivery for dual-socket workstation motherboards supporting Xeon W-series CPUs with multi-rail sequencing demands. IC Role / Device Role / Timing Role: SVID master controller coordinating phase interleaving, thermal throttling signals, and PGOOD sequencing with companion PMICs. Use Value: Serial bus interface reduces routing complexity vs. parallel VID, and programmable VBOOT accommodates diverse high-side FET selections. | Use Scenario: VR12.5-compliant core regulator in ruggedized embedded systems using Xeon D or Scalable processors in telecom and industrial servers. IC Role / Device Role / Timing Role: Robust PWM controller with NTC-compensated DCR sensing and adaptive body diode control for extended lifetime under continuous high-temperature operation. Use Value: Light-load efficiency improvement from R3 modulation extends battery-backed runtime and reduces heatsink requirements in fanless deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VR12.5 CPU voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT8803AZSP | 3+1 phase topology; integrated MOSFET drivers only (no high-side gate drivers); fixed 500 kHz switching frequency. | Limited to mid-range mobile CPUs; lacks SVID PSx support and programmable slew rate. | Choose RT8803AZSP for cost-sensitive, lower-current notebook designs where full VR12.5 PSx compliance is not required. |
| MP2940AGQKT | 4-phase VR12.5 controller with integrated telemetry ADC; supports SMBus instead of SVID; no DCR temperature compensation circuitry. | Requires external ADC for current monitoring; incompatible with Intel PSx state transitions due to SMBus-only interface. | Choose MP2940AGQKT when telemetry data logging and SMBus infrastructure already exist, but avoid for platforms requiring native SVID handshake. |
Compared with RT8803AZSP and MP2940AGQKT, the ISL95816IRZ-T uniquely delivers full VR12.5 SVID compliance, resistor-programmable parameters for rapid prototyping, and R3 modulator benefits for both transient response and light-load efficiency - making it optimal for high-fidelity CPU VR designs demanding specification fidelity and thermal headroom.
Availability
ISL95816IRZ-T is available at Aetrix Electronics and suitable for notebook CPU VR, desktop high-performance VR, and workstation processor VR applications requiring stable component supply, long-term lifecycle support, and verified VR12.5 compliance.
Supply support for ISL95816IRZ-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, including VR controllers for computing applications.
The ISL95816IRZ-T belongs to Renesas' VR12.5-compliant PWM controller product line, designed specifically for Intel CPU core power delivery with emphasis on SVID interoperability, multi-phase scalability, and thermal robustness in space-constrained platforms.
FAQ
What VR standard does the ISL95816IRZ-T support?
The ISL95816IRZ-T is fully compliant with the Intel VR12.5 specification. It implements the SVID 2.0 serial interface for dynamic voltage identification, power-state coordination (PS0–PS4), and fault reporting. This ensures seamless integration with Intel Core i-series and Xeon processors requiring VR12.5-compliant core power delivery.
Does the ISL95816IRZ-T support DCR current sensing with temperature compensation?
Yes, the ISL95816IRZ-T supports lossless inductor DCR current sensing with automatic temperature compensation using a single NTC thermistor. This feature is explicitly documented in the FN7979 datasheet and enables accurate current measurement across temperature without additional sensing resistors or complex calibration.
Can the ISL95816IRZ-T operate in fewer than 4 phases?
Yes, the ISL95816IRZ-T is configurable for 1-, 2-, 3-, or 4-phase operation via pin-strapping or SVID command. This flexibility allows designers to optimize phase count based on CPU current demand, thermal limits, and PCB layout constraints without changing the controller IC.
What is the purpose of the R3 modulator in the ISL95816IRZ-T?
The R3 modulator in the ISL95816IRZ-T provides variable switching frequency during load transients, resulting in faster voltage recovery and improved light-load efficiency. Unlike fixed-frequency PWM, R3 dynamically adjusts frequency to maintain optimal loop response and minimize output capacitance requirements in the ISL95816IRZ-T design.
How is the switching frequency programmed on the ISL95816IRZ-T?
The switching frequency of the ISL95816IRZ-T is resistor-programmable from 200 kHz to 1000 kHz using an external RT resistor connected between the RT pin and GND. The exact value is determined by the formula fSW = 1.2×10⁶ / RT (Ω), as specified in the FN7979 datasheet for the ISL95816IRZ-T.
ISL95816IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5
- Voltage - Input:
- 4.5V ~ 28V
- 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:
- 32-QFN (4x4)
ISL95816IRZ-T FAQ
1.How can I place an order for ISL95816IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95816IRZ-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 ISL95816IRZ-T reliable?
The price and inventory of ISL95816IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95816IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95816IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95816IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95816IRZ-T?
ISL95816IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95816IRZ-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 ISL95816IRZ-T?
For technical support, including ISL95816IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95816IRZ-T requirements.
6.How does Aetrix verify that ISL95816IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95816IRZ-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 ISL95816IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95816IRZ-T?
All ISL95816IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95816IRZ-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 ISL95816IRZ-T part is unused and in its original packaging.
Return procedure for ISL95816IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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