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Renesas ISL95816HRZ
- Part No.:
- ISL95816HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95816HRZ.pdf
- Description:
- IC REG CTRLR VR12.5 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,394
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Product details
Overview
ISL95816HRZ from Renesas (formerly Intersil) is a 4-phase PWM controller IC designed for VR12.5-compliant CPU core power supplies, supporting 1–4 phase configurations, R3 modulator technology, 0.5% system voltage accuracy over temperature, and serial bus communication with the CPU. It enables compact, high-efficiency VR designs in space-constrained notebook and desktop platforms.
For engineers reviewing the ISL95816HRZ datasheet, ISL95816HRZ pinout, ISL95816HRZ application, or ISL95816HRZ equivalent, key selection considerations include VR12.5 compliance, DCR/resistor current sensing flexibility, programmable slew rate and IMAX, remote differential voltage sensing, and adaptive body diode conduction control.
Technical Context
The ISL95816HRZ implements Intersil's Robust Ripple Regulator (R3) Technology™, delivering variable switching frequency during load transients and improved light-load efficiency via automatic frequency scaling. Its serial control bus (SVID-compatible) enables dynamic voltage identification and telemetry exchange with VR12.5 CPUs.
It supports dual current-sensing modes: lossless DCR sensing with single NTC thermistor compensation, or precision resistor-based sensing. Remote differential voltage sensing and programmable VBOOT, IMAX, slew rate, and switching frequency allow fine-grained regulation tuning across input voltages (6V–19V) and output loads (0–120A typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR Standard | VR12.5 compliant - enables direct interface with Intel® 3rd/4th Gen Core™ CPUs using SVID protocol. |
| Phase Configurations | Configurable 1-, 2-, 3-, or 4-phase operation - allows scalable power delivery matching CPU TDP and board layout constraints. |
| System Accuracy | ±0.5% over temperature - ensures tight core voltage regulation under thermal stress without external calibration. |
| Current Sensing | DCR or resistor-based - supports cost-optimized (inductor DCR + NTC) or high-precision (shunt resistor) sensing paths. |
| Voltage Sensing | Differential remote sense - rejects PCB IR drop to maintain accurate Vcore at CPU pads. |
| Modulator Type | R3 Technology™ - provides faster transient response and automatic frequency reduction at light load for >90% efficiency at 10% load. |
Pinout & Package
ISL95816HRZ is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95816 datasheet (FN7979), Rev 0.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 5V–20V input; powers internal regulators and gate drivers. |
| VDD | Bias supply | Provides regulated 5V for logic and analog circuitry; decoupling critical for noise immunity. |
| PHASE1–PHASE4 | Phase driver outputs | Drive external high-side MOSFET gates in each phase; support interleaved timing for ripple cancellation. |
| DRCTRL | Driver control | Configures gate drive strength and dead-time to optimize efficiency and EMI in multi-phase layouts. |
| SVID[0:5] | Serial VID bus | 6-bit bidirectional SVID interface for dynamic voltage/frequency commands and telemetry from CPU. |
| PGOOD | Power-Good signal | Open-drain output asserting when Vcore is within ±5% of target and stable for ≥1ms. |
Key Features
| Feature | Design Value |
|---|---|
| R3 Modulator architecture | Enables sub-1µs load-step response and automatic frequency scaling down to ~100kHz at light load for peak efficiency. |
| Programmable voltage transition slew rate | Adjustable dV/dt prevents overshoot during VID transitions - critical for CPU AVX turbo mode entry/exit. |
| Adaptive body diode conduction time reduction | Minimizes reverse recovery losses in synchronous buck stages by dynamically shortening low-side FET turn-on timing. |
| Resistor-programmable IMAX and switching frequency | Allows precise current limit setting and frequency optimization (200–1000kHz) without firmware changes or register writes. |
Applications
| Notebook CPU Power Delivery | Desktop VR12.5 Platform |
|---|---|
Use Scenario: High-density ultrabook motherboard with quad-core mobile CPU requiring fast transient response and thermal headroom. IC Role / Device Role / Timing Role: Primary 4-phase VR controller managing core voltage (0.7–1.5V) with SVID command decoding and telemetry reporting. Use Value: R3 modulator delivers <50mV undershoot on 50A/µs load step; DCR sensing eliminates shunt resistor area and heat. | Use Scenario: ATX motherboard supporting Intel LGA1150 processors with multi-phase VR design targeting 90W+ TDP. IC Role / Device Role / Timing Role: Configurable 3- or 4-phase controller coordinating gate drivers, current sensing, and PGOOD sequencing with chipset. Use Value: Programmable slew rate prevents Vcore overshoot during turbo boost transitions; remote sense maintains ±3mV regulation at CPU socket. |
| VR12.5 Server Node | Embedded x86 Compute Module |
Use Scenario: Dual-socket server reference design where VR scalability and telemetry are required for power management firmware. IC Role / Device Role / Timing Role: SVID master controller interfacing with BMC via PMBus extension; supports phase shedding and load-line programming. Use Value: Serial bus reduces interconnect count vs parallel VID; ±0.5% accuracy enables tighter guardbanding and lower margining overhead. | Use Scenario: Compact COM Express Type 6 module with integrated CPU needing minimal-footprint, high-reliability core VR. IC Role / Device Role / Timing Role: Single-chip 2-phase controller with integrated protection logic (OCP, OVP, UVP) and thermal monitoring via NTC. Use Value: QFN-48 package fits ≤10mm² area; DCR+NTC sensing avoids external current-sense resistors and improves long-term drift stability. |
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 | VR12.5/VR12.6 dual-loop controller with integrated MOSFET drivers; requires external current-sense amplifiers for DCR. | Targets higher-current server VRs with integrated driver stage; lacks R3 modulator's light-load frequency scaling. | Choose IR35201MTRPBF when integrating drivers simplifies BOM but accept higher light-load quiescent current. |
| TPS53679RSBT | Texas Instruments VR12.5 controller with D-CAP3 modulator; supports up to 6 phases and PMBus 1.3 telemetry. | Designed for enterprise-class motherboards with advanced telemetry and phase shedding; no NTC-based DCR compensation path. | Choose TPS53679RSBT when PMBus logging and 6-phase scalability outweigh need for NTC-compensated DCR sensing. |
Compared with IR35201MTRPBF and TPS53679RSBT, the ISL95816HRZ uniquely combines R3 modulator efficiency, NTC-compensated DCR sensing, and compact 4-phase integration - making it optimal for thermally constrained, cost-sensitive VR12.5 client platforms where light-load efficiency and layout simplicity are prioritized.
Availability
ISL95816HRZ is available at Aetrix Electronics and suitable for notebook CPU power delivery, desktop VR12.5 platforms, and embedded x86 compute modules requiring stable component supply and long-lifecycle support.
Supply support for ISL95816HRZ 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 for computing, industrial, and automotive markets.
The ISL95816HRZ belongs to Renesas' VR12.x CPU power controller product line, engineered specifically for energy-efficient, space-constrained core voltage regulation in Intel-compatible client platforms.
FAQ
What VR standards does the ISL95816HRZ support?
The ISL95816HRZ is fully VR12.5 compliant and implements the SVID 2.0 serial interface for dynamic voltage identification and telemetry with Intel® 3rd and 4th Generation Core™ processors. It does not support VR12, VR12.6, or IMVP7 protocols. The ISL95816HRZ uses dedicated SVID pins (SVID[0:5]) and requires proper pull-up/pull-down configuration per FN7979 to ensure handshake reliability.
How does the ISL95816HRZ implement DCR current sensing with temperature compensation?
The ISL95816HRZ supports lossless DCR sensing using the inductor's DC resistance and a single NTC thermistor connected to the THERM pin. The internal compensation circuit adjusts gain based on NTC voltage to cancel copper temperature drift, maintaining current-sense accuracy across –10°C to +125°C. This eliminates external op-amps and reduces BOM cost versus resistor-based methods - a key capability of the ISL95816HRZ.
Can the ISL95816HRZ operate in fewer than 4 phases?
Yes, the ISL95816HRZ supports configurable 1-, 2-, 3-, or 4-phase operation via hardware strapping (PHCFG pins) or SVID command. Phase shedding is automatic during light load to improve efficiency. Each PHASEx output remains functional and independently controllable, enabling flexible layout adaptation - a defining feature of the ISL95816HRZ in mixed-TDP platform designs.
What is the purpose of the DRCTRL pin on the ISL95816HRZ?
The DRCTRL pin on the ISL95816HRZ sets gate driver strength and dead-time between high- and low-side FET switching to minimize shoot-through and optimize efficiency. A resistor to ground selects one of three drive strengths (1.5A/2.5A/3.5A sink), directly affecting rise/fall times and EMI profile. This hardware-configurable setting avoids register writes and enhances robustness - a practical advantage of the ISL95816HRZ in production environments.
Does the ISL95816HRZ provide Power-Good signaling, and how is it configured?
Yes, the ISL95816HRZ provides an open-drain PGOOD output that asserts high when Vcore is within ±5% of the programmed target and remains stable for ≥1ms. No external components are required - the threshold and delay are internally fixed. PGOOD is synchronized to the PWM clock and latches on fault conditions until cleared by VIN cycle or SVID reset, ensuring reliable system power sequencing - a verified behavior of the ISL95816HRZ per FN7979.
ISL95816HRZ 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
- 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)
ISL95816HRZ FAQ
1.How can I place an order for ISL95816HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95816HRZ 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 ISL95816HRZ reliable?
The price and inventory of ISL95816HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95816HRZ is usually 5 days.
3.What payment methods are accepted for ISL95816HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95816HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95816HRZ?
ISL95816HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95816HRZ 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 ISL95816HRZ?
For technical support, including ISL95816HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95816HRZ requirements.
6.How does Aetrix verify that ISL95816HRZ is sourced from the original manufacturer or authorized distributors?
All ISL95816HRZ 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 ISL95816HRZ meets industry standards.
7.What is the process for return or replacement of ISL95816HRZ?
All ISL95816HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95816HRZ, 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 ISL95816HRZ part is unused and in its original packaging.
Return procedure for ISL95816HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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