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Renesas ISL95816AHRZ
- Part No.:
- ISL95816AHRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95816AHRZ.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,524
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Product details
Overview
ISL95816AHRZ from Renesas Electronics (formerly Intersil) is a 4-phase PWM controller IC designed for VR12.5 and VR12.6-compliant CPU core power supplies, featuring R3™ modulator technology, 0.5% system voltage accuracy over temperature, programmable switching frequency (up to 1.5 MHz), DCR or resistor-based current sensing, and differential remote voltage sensing - deployed in high-efficiency notebook and desktop VRMs.
For engineers reviewing the ISL95816AHRZ datasheet, ISL95816AHRZ pinout, ISL95816AHRZ application, or ISL95816AHRZ equivalent, key selection considerations include phase configurability (1–4 phases), R3™ transient response behavior, VR12.5/VR12.6 serial bus compliance, VBOOT programmability, and IMAX/slew rate adjustability for dynamic load management.
Technical Context
The ISL95816AHRZ implements a digital serial control interface compliant with Intel VR12.5 and VR12.6 specifications, enabling communication with the CPU for adaptive voltage positioning (AVP) and load-line regulation. It supports dynamic phase shedding across 1–4 phases and integrates adaptive body diode conduction time reduction to minimize shoot-through losses.
R3™ Robust Ripple Regulator technology enables variable-frequency operation during load transients - increasing frequency under heavy load for faster response and reducing it at light load to improve efficiency. The controller accepts either lossless DCR sensing (with single NTC thermistor compensation) or precision resistor sensing, and provides differential remote sense inputs for ±0.5% output voltage regulation accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Standard | VR12.5 and VR12.6 compliant - enables direct CPU serial bus interface for AVP, load-line, and telemetry. |
| Phase Configurability | 1-, 2-, 3-, or 4-phase operation - allows scalable VRM design matching CPU current demand and thermal constraints. |
| System Voltage Accuracy | ±0.5% over temperature - ensures stable core voltage under varying junction temperatures without recalibration. |
| Switching Frequency Range | Programmable up to 1.5 MHz - balances EMI, efficiency, and component size; dynamically adjusted by R3™ during transients. |
| Current Sensing Options | DCR sensing with NTC compensation OR precision resistor sensing - eliminates need for dedicated current-sense amplifiers in most designs. |
| Voltage Transition Slew Rate | Resistor-programmable - controls dV/dt during VID transitions to prevent overshoot/undershoot during CPU state changes. |
| Power-Good Signal | Dedicated PGOOD output - asserts after soft-start completion and valid output regulation, enabling safe CPU reset sequencing. |
Pinout & Package
ISL95816AHRZ is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Intersil FN8599 Rev 1.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5 V to 24 V input; powers internal bias circuitry and gate drivers. |
| VDD | Internal LDO output | Provides regulated 5 V for logic and interface circuits; requires local 1 µF decoupling. |
| PHASE1–PHASE4 | Phase driver outputs | Drive external high-side MOSFET gates; support interleaved timing and phase shedding. |
| DRVCTRL | Driver control input | Configures gate drive strength and dead-time; sets adaptive body diode conduction reduction mode. |
| SCL/SDA | VR12.5/VR12.6 serial bus | Two-wire interface for CPU communication; supports VID updates, telemetry readback, and fault reporting. |
| VSNS+/VSNS− | Differential remote sense | Connects directly to CPU Vcore pads; rejects PCB IR drop for precise regulation at point-of-load. |
| IMON | Current monitor output | Analog voltage proportional to total output current; used for system telemetry and OCP threshold setting. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator | Delivers sub-100 ns transient response and automatic frequency scaling - improves both dynamic stability and light-load efficiency without mode switching. |
| Programmable VBOOT | Adjustable boot voltage (0.5–1.2 V) via external resistor divider - ensures reliable high-side FET turn-on during startup across input voltage ranges. |
| Adaptive Body Diode Reduction | Minimizes reverse recovery losses in synchronous rectifiers - reduces heat generation and improves efficiency at medium loads. |
| PS4 Low-Power State | Draws <50 µA supply current in deep sleep - extends battery life in mobile platforms during CPU idle states. |
| Load-Line Regulation | Supports programmable droop (ΔV/ΔI) per VR12.5 spec - maintains optimal CPU voltage vs. current for thermal and performance balancing. |
Applications
| Notebook CPU VRM | Desktop CPU VRM |
|---|---|
Use Scenario: High-performance ultrabook with quad-core mobile CPU requiring rapid voltage scaling and thermal-aware power delivery. IC Role / Device Role / Timing Role: Primary 4-phase PWM controller managing core voltage, phase shedding, and VR12.6 serial telemetry. Use Value: Enables <100 ns load-step response and ±0.5% regulation accuracy - critical for maintaining CPU stability during burst workloads. | Use Scenario: ATX motherboard supporting Intel Core i7/i9 processors with aggressive AVP and multi-phase current sharing. IC Role / Device Role / Timing Role: VR12.5-compliant controller coordinating four external power stages and remote sensing across long PCB traces. Use Value: Differential remote sense and programmable load line ensure accurate core voltage delivery despite board-level IR drop and thermal drift. |
| Gaming Laptop VRM | Workstation CPU VRM |
Use Scenario: Thin-and-light gaming laptop with discrete GPU and CPU sharing thermal envelope, demanding efficient low-load operation. IC Role / Device Role / Timing Role: Adaptive-phase PWM controller using R3™ modulation and PS4 low-power mode to reduce idle power dissipation. Use Value: Achieves >90% efficiency at 1 A load via variable-frequency operation - extends battery runtime without sacrificing peak performance. | Use Scenario: Dual-socket Xeon workstation with strict voltage tolerance requirements and telemetry-driven thermal management. IC Role / Device Role / Timing Role: Precision voltage regulator controller with DCR current sensing and NTC compensation for accurate current reporting and OCP. Use Value: Single-NTC DCR compensation maintains ±3% current measurement accuracy across −10°C to +105°C - essential for fan speed and throttling algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase CPU voltage regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR35201MTRPBF | 6-phase capable, supports VR12/VR12.5 only; lacks VR12.6 telemetry extensions and R3™ frequency agility. | Targeted at higher-current server/desktop CPUs; no native PS4 low-power state support. | Choose when >4-phase capability is required and VR12.6-specific features are not needed. |
| RT8803AZQW | 4-phase, VR12.5-compliant; uses conventional fixed-frequency COT architecture - slower transient response than R3™. | Optimized for cost-sensitive mainstream notebooks; no adaptive body diode reduction or VBOOT programming. | Choose for simpler designs where ±1% voltage accuracy and moderate transient performance suffice. |
Compared with IR35201MTRPBF and RT8803AZQW, the ISL95816AHRZ uniquely delivers VR12.6 compliance, R3™-based sub-100 ns transient response, and integrated PS4 low-power mode - making it optimal for next-generation mobile and high-efficiency desktop VRMs where dynamic accuracy and battery life are prioritized.
Availability
ISL95816AHRZ is available at Aetrix Electronics and suitable for notebook CPU VRMs, desktop motherboard power delivery, and workstation core voltage regulation requiring stable component supply, long-term lifecycle support, and VR12.5/VR12.6 specification compliance.
Supply support for ISL95816AHRZ 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 acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio. Intersil was known for robust power ICs targeting computing, industrial, and communications infrastructure.
The ISL95816AHRZ belongs to Intersil's VR12.x CPU power controller family, engineered specifically for Intel microprocessor voltage regulation - emphasizing fast transient response, serial bus integration, and multi-phase scalability in space-constrained platforms.
FAQ
What is the primary function of the ISL95816AHRZ in a CPU power delivery system?
The ISL95816AHRZ serves as a 4-phase PWM controller that manages core voltage regulation for Intel VR12.5 and VR12.6-compliant CPUs. It executes adaptive voltage positioning, load-line control, phase shedding, and real-time telemetry via serial bus. Its R3™ modulator ensures precise, fast-response regulation - making the ISL95816AHRZ central to stable and efficient CPU power delivery in modern notebooks and desktops.
Does the ISL95816AHRZ support both DCR and resistor-based current sensing?
Yes, the ISL95816AHRZ supports dual current sensing methods: lossless inductor DCR sensing with single NTC thermistor compensation for temperature drift correction, and precision shunt resistor sensing for higher accuracy where DCR variation is unacceptable. This flexibility allows designers to optimize cost, layout, and accuracy - and the ISL95816AHRZ automatically adapts sensing gain and offset calibration accordingly.
What is the significance of the R3™ modulator in the ISL95816AHRZ?
The R3™ modulator in the ISL95816AHRZ enables variable switching frequency during load transients - increasing frequency for faster response under step loads and decreasing it at light loads to boost efficiency. Unlike fixed-frequency or basic COT controllers, R3™ eliminates mode-hopping artifacts and delivers consistent ±0.5% voltage accuracy. This makes the ISL95816AHRZ especially effective in dynamic CPU workloads where both responsiveness and battery life matter.
Can the ISL95816AHRZ be configured for fewer than four phases?
Yes, the ISL95816AHRZ is fully configurable for 1-, 2-, 3-, or 4-phase operation via hardware strapping or serial bus commands. Phase count is dynamically adjustable during runtime to match CPU activity - reducing switching losses and improving light-load efficiency. This scalability means the same ISL95816AHRZ can serve entry-level dual-core and high-end octa-core platforms, simplifying BOM management across product families.
What package type and thermal characteristics does the ISL95816AHRZ use?
The ISL95816AHRZ uses a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with an exposed thermal pad for enhanced heat dissipation. Its θJA is 35°C/W (JEDEC standard board), and the thermal pad must be soldered to a dedicated copper pour for optimal performance. This compact, thermally efficient package supports high-density VRM layouts - a key requirement for thin-profile notebooks where the ISL95816AHRZ is commonly deployed.
ISL95816AHRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VR12.5, VR12.6
- Voltage - Input:
- 4.5V ~ 28V
- 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:
- 32-QFN (4x4)
ISL95816AHRZ FAQ
1.How can I place an order for ISL95816AHRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95816AHRZ 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 ISL95816AHRZ reliable?
The price and inventory of ISL95816AHRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95816AHRZ is usually 5 days.
3.What payment methods are accepted for ISL95816AHRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95816AHRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95816AHRZ?
ISL95816AHRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95816AHRZ 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 ISL95816AHRZ?
For technical support, including ISL95816AHRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95816AHRZ requirements.
6.How does Aetrix verify that ISL95816AHRZ is sourced from the original manufacturer or authorized distributors?
All ISL95816AHRZ 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 ISL95816AHRZ meets industry standards.
7.What is the process for return or replacement of ISL95816AHRZ?
All ISL95816AHRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95816AHRZ, 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 ISL95816AHRZ part is unused and in its original packaging.
Return procedure for ISL95816AHRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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