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Renesas ISL95712HRZ-T
- Part No.:
- ISL95712HRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 52-VFQFN Exposed Pad
- Datasheet:
-
ISL95712HRZ-T.pdf
- Description:
- IC REG CTRLR MULTIPH 1OUT 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
ISL95712HRZ-T from Renesas Electronics (formerly Intersil) is a dual-output multiphase PWM controller for AMD Fusion™ desktop CPU/GPU core power delivery, compliant with SVI 2.0 and PMBus. It supports 1–4-phase operation on the Core VR and 1–3-phase on the Northbridge VR, delivers 0.5% system voltage accuracy over temperature, operates from 0.5V to 1.55V in 6.25mV steps, and integrates 12V gate drivers in a 52-lead 6×6 QFN package.
For engineers reviewing the ISL95712HRZ-T datasheet, ISL95712HRZ-T pinout, ISL95712HRZ-T application, or ISL95712HRZ-T equivalent, key selection criteria include SVI 2.0 serial interface compatibility, dual-VR phase programmability, DCR/resistor current sensing support, differential remote voltage sensing, and thermal monitoring via dual NTC inputs for Core and Northbridge rails.
Technical Context
The ISL95712HRZ-T implements Robust Ripple Regulator R3™ technology to dynamically adjust switching frequency during load transients, improving transient settling time and light-load efficiency. Its dual-VR architecture shares a single serial control bus (SVC/SVD/SVT) for communication with AMD CPUs, reducing board area versus discrete dual-controller solutions.
It features two independent error amplifiers (COMP/COMP_NB), transconductance current-sense amplifiers (ISUMP/ISUMN and ISUMP_NB/ISUMN_NB), programmable load line slope, VID-on-the-fly slew rate control, and adaptive body diode conduction time reduction-enabling precise dynamic voltage scaling and phase current balancing across all enabled phases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SVI 2.0 Interface | Fully compliant; supports 100kHz–25MHz serial VID clock for bidirectional CPU–VR communication and telemetry. |
| Output Voltage Range | 0.5V to 1.55V in 6.25mV steps; enables precise core/Northbridge voltage setting per AMD VID tables. |
| System Accuracy | ±0.5% over –10°C to +100°C ambient; ensures stable microprocessor operation under thermal stress. |
| Switching Frequency | Programmable 280–450kHz per VR; balances efficiency, component size, and transient response. |
| Phase Configurability | Core VR: 1–4 phases; Northbridge VR: 1–3 phases; configured via ISENx pin strapping for flexible power stage design. |
| Current Sensing | Supports lossless DCR sensing (with NTC compensation) or precision resistor sensing on both outputs. |
| Package | 52-lead 6×6 mm QFN with exposed thermal pad; RoHS-compliant, Pb-free, MSL3 rated. |
Pinout & Package
ISL95712HRZ-T is housed in a 52-lead 6×6 mm QFN package with an exposed thermal pad (GND) on the bottom. The package supports high-current gate drive and efficient thermal dissipation in compact CPU VRM layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1–ISEN4 / ISEN1_NB–ISEN3_NB | Individual channel current sense enable | Strapping to +5V disables corresponding phase; determines active phase count for Core (1–4) and Northbridge (1–3) VRs. |
| UGATE1–UGATE2 / UGATE1_NB / PWM3–PWM4 / PWM2_NB–PWM3_NB | High-side gate drive outputs | Drive external N-channel MOSFET gates; UGATEx pins support 2A source/sink; PWMx pins provide phase timing signals. |
| LGATE1–LGATE2 / LGATE1_NB | Low-side gate drive outputs | Drive low-side MOSFET gates with 4A sink capability; optimized for synchronous buck topology. |
| VSEN / VSEN_NB / RTN | Differential remote voltage sense | Connects directly to CPU die sense points; enables accurate regulation at point-of-load despite PCB IR drop. |
| SVC / SVD / SVT | AMD SVI 2.0 serial interface | Provides VID programming, telemetry reporting (IMON, temperature), and fault signaling to AMD CPU without additional controllers. |
| IMON / IMON_NB | Analog current monitor outputs | Provide 1:1000 proportional current signals for real-time output current measurement and system telemetry. |
| NTC / NTC_NB | Thermistor bias inputs | Interface with NTC thermistors to enable temperature-compensated DCR current sensing and thermal overload detection. |
| PGOOD / PGOOD_NB | Open-drain power-good indicators | Assert after soft-start completion and voltage regulation stability; used by CPU to release reset and enter active state. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Automatically adjusts switching frequency during load steps to reduce transient undershoot/overshoot and improve light-load efficiency. |
| Dual Independent VR Control | Separate feedback loops, current sensing, and phase configuration for Core and Northbridge outputs-enables independent voltage, load line, and protection tuning. |
| Programmable Load Line & Offset | Resistor-programmed droop (load line) and VID offset on both outputs ensure compliance with AMD dynamic voltage–current requirements. |
| Adaptive Body Diode Conduction Reduction | Minimizes reverse recovery losses in low-side MOSFETs during light-load discontinuous conduction mode (DCM). |
| PMBus/I²C Secondary Interface | I2CLK/I2DATA pins enable non-SVI diagnostics, firmware updates, and system-level telemetry integration beyond AMD CPU control. |
Applications
| Desktop CPU Core Power | AMD Fusion GPU Power |
|---|---|
Use Scenario: High-performance desktop motherboard delivering regulated core voltage to AMD A-series APUs with dynamic power states. IC Role / Device Role / Timing Role: Dual-output multiphase PWM controller managing up to 4-phase Core and 3-phase Northbridge VRMs with SVI 2.0 coordination. Use Value: Enables precise VID tracking, fast transient response, and thermal-aware current sensing-critical for maintaining CPU stability during Turbo Boost and multi-threaded workloads. | Use Scenario: Integrated graphics power delivery on AMD Fusion platforms where GPU voltage must scale independently but synchronously with CPU core. IC Role / Device Role / Timing Role: Northbridge VR controller providing tightly regulated, low-noise 1.1–1.3V supply with differential remote sensing and programmable load line. Use Value: Supports GPU voltage scaling during graphics-intensive tasks while sharing serial bus resources with Core VR-reducing BOM cost and PCB footprint. |
| Compact VRM Reference Designs | Thermally Managed Desktop Systems |
Use Scenario: Space-constrained mini-ITX or small-form-factor desktop boards requiring minimal VRM component count and layout area. IC Role / Device Role / Timing Role: Single-chip dual-VR solution replacing two discrete controllers; integrates gate drivers, telemetry, and SVI 2.0 interface. Use Value: Reduces gate driver IC count by 2, eliminates separate SVI interface logic, and consolidates current/voltage/thermal monitoring into one device. | Use Scenario: High-ambient-temperature desktop systems (e.g., living room PCs, embedded gaming appliances) requiring robust thermal protection. IC Role / Device Role / Timing Role: Dual NTC inputs (NTC/NTC_NB) feed VR_HOT_L open-drain thermal alert signal to CPU, triggering thermal throttling before junction limits are exceeded. Use Value: Provides independent thermal monitoring for Core and Northbridge domains-preventing localized hotspots and enabling asymmetric thermal management policies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95713HRZ-T | Same pinout and SVI 2.0 compliance; adds integrated MOSFET drivers with higher peak current (3A UGATE/5A LGATE) and enhanced thermal monitoring resolution. | Targeted at higher-power AMD FX-series platforms requiring tighter transient response and extended temperature range (–40°C to +100°C). | Select ISL95713HRZ-T when upgrading from ISL95712HRZ-T for improved gate drive strength or extended industrial temperature support. |
| RT8803AZSP | Single-output 4-phase controller with SVI 2.0; lacks Northbridge VR channel and dual-NTC thermal monitoring; uses different pinout and no PMBus interface. | Designed for cost-sensitive single-rail CPU-only designs without integrated GPU power requirements. | Choose RT8803AZSP only for simplified single-VR applications where Northbridge regulation and dual-domain telemetry are unnecessary. |
Compared with ISL95712HRZ-T, ISL95713HRZ-T offers higher gate drive capability and broader temperature rating for demanding platforms, while RT8803AZSP provides lower-cost single-rail control at the expense of dual-VR flexibility and thermal monitoring granularity.
Availability
ISL95712HRZ-T is available at Aetrix Electronics and suitable for desktop motherboard design, AMD APU power delivery, and compact VRM reference designs requiring stable component supply and long-term industrial availability.
Supply support for ISL95712HRZ-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 acquired Intersil in 2017 and continues its high-performance analog and power management portfolio. Intersil was known for robust power delivery ICs targeting computing and industrial applications.
The ISL95712HRZ-T belongs to Intersil's AMD-specific VR controller product line, engineered to meet the stringent voltage accuracy, transient response, and serial interface requirements of AMD Fusion™ desktop processors.
FAQ
What is the operating temperature range for the ISL95712HRZ-T?
The ISL95712HRZ-T is rated for ambient temperatures from –10°C to +100°C and junction temperatures up to +125°C. This HRZ grade variant is specified for desktop computing environments where airflow and thermal management are moderate, distinguishing it from the wider-range IRZ variant (–40°C to +100°C).
Does the ISL95712HRZ-T support both DCR and resistor-based current sensing?
Yes, the ISL95712HRZ-T supports both lossless inductor DCR current sensing-with optional NTC thermistor compensation via NTC/NTC_NB pins-and precision resistor current sensing on both Core and Northbridge outputs. Each method is independently configurable through dedicated ISENx pins and amplifier inputs (ISUMP/ISUMN and ISUMP_NB/ISUMN_NB).
How does the ISL95712HRZ-T implement AMD SVI 2.0 compliance?
The ISL95712HRZ-T implements full AMD SVI 2.0 compliance through dedicated SVC (clock), SVD (bidirectional data), and SVT (telemetry) pins. It supports 100kHz–25MHz serial VID communication, VID-on-the-fly slew rate control, real-time IMON/temperature telemetry, and pre-PWROK metal VID configuration-all required by AMD Fusion™ platform specifications.
Can the ISL95712HRZ-T be used for single-rail applications?
Yes, the ISL95712HRZ-T can operate in single-rail mode: the Northbridge VR section may be disabled by tying ISEN1_NB to +5V, and the Core VR can be configured for 1-, 2-, 3-, or 4-phase operation. However, its dual-VR architecture and shared SVI bus are optimized for coordinated CPU+GPU power delivery, not standalone single-output use.
What protection features are integrated into the ISL95712HRZ-T?
The ISL95712HRZ-T integrates overcurrent protection (OCP/WOC) with programmable threshold, overvoltage protection (OVP), undervoltage lockout (UVLO), thermal monitoring via dual NTC inputs, power-good status (PGOOD/PGOOD_NB), and VR_HOT_L thermal alert signaling. Fault recovery is automatic after fault condition removal, with no external latch required.
ISL95712HRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, AMD Fusion™ SVI 2.0 CPU GPU
- Voltage - Input:
- 4.75V ~ 5.25V
- Number of Outputs:
- 1
- Voltage - Output:
- Adj to 1.55V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (6x6)
ISL95712HRZ-T FAQ
1.How can I place an order for ISL95712HRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95712HRZ-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 ISL95712HRZ-T reliable?
The price and inventory of ISL95712HRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95712HRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95712HRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95712HRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95712HRZ-T?
ISL95712HRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95712HRZ-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 ISL95712HRZ-T?
For technical support, including ISL95712HRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95712HRZ-T requirements.
6.How does Aetrix verify that ISL95712HRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95712HRZ-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 ISL95712HRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95712HRZ-T?
All ISL95712HRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95712HRZ-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 ISL95712HRZ-T part is unused and in its original packaging.
Return procedure for ISL95712HRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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