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Renesas ISL95712HRZ
- Part No.:
- ISL95712HRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 52-VFQFN Exposed Pad
- Datasheet:
-
ISL95712HRZ.pdf
- Description:
- IC REG CTRLR MULTIPH 1OUT 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
ISL95712HRZ from Renesas (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, integrates 12V gate drivers, delivers 0.5% system voltage accuracy over temperature, and operates across 0.5V–1.55V output range in 6.25mV steps.
For engineers reviewing the ISL95712HRZ datasheet, ISL95712HRZ pinout, ISL95712HRZ application, or ISL95712HRZ equivalent, this page provides verified technical context, validated pin functions, confirmed dual-VR architecture, R3™ modulator transient response behavior, and real-world implementation details for AMD desktop platform power design.
Technical Context
The ISL95712HRZ implements two independent voltage regulator controllers-Core VR (1–4 phase) and Northbridge VR (1–3 phase)-sharing a single SVI 2.0 serial bus to reduce component count and board area. Each VR uses Robust Ripple Regulator (R3™) technology for adaptive switching frequency modulation during load transients.
It supports lossless DCR current sensing with NTC-based temperature compensation on both outputs, differential remote voltage sensing (VSEN/RTN), programmable load line slope, VID-on-the-fly slew rate control, and telemetry-capable IMON/IMON_NB current monitor outputs-all within a single 52-pin QFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SVI 2.0 Interface | Fully compliant; enables bidirectional communication with AMD CPU at 100kHz–25MHz clock frequency for dynamic VID updates and telemetry. |
| Output Voltage Range | 0.5V–1.55V in 6.25mV steps; supports precise core/Northbridge rail regulation per AMD Fusion processor requirements. |
| System Accuracy | ±0.5% over –10°C to +100°C ambient; ensures stable microprocessor operation under thermal stress without calibration drift. |
| Switching Frequency | Programmable 280–450kHz per VR; balances efficiency, component size, and transient response for high-power desktop CPU applications. |
| Gate Driver Supply | VDDP = +12V ±5%; powers integrated high-current UGATE/LGATE drivers capable of 2A source/sink for MOSFET control. |
| Current Sensing | Supports both DCR (inductor-based) and precision resistor methods; enables accurate phase current balancing and thermal-aware load line compensation. |
| Protection Features | OCP/WOC, OVP, PGOOD, thermal monitor (NTC/NTC_NB), and fault recovery; meets AMD SVI 2.0 Controller Guidelines for safe power-up and runtime operation. |
Pinout & Package
ISL95712HRZ is housed in a RoHS-compliant 52-lead 6mm × 6mm QFN package with exposed thermal pad (PKG DWG L52.6x6A). The package supports high-density desktop motherboard layouts and efficient thermal dissipation via bottom-side GND pad soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISEN1–ISEN4 / ISEN1_NB–ISEN3_NB | Individual channel current sense inputs | Enable phase enable/disable configuration (e.g., tie ISEN4 to +5V to force 3-phase Core VR); support DCR or resistor sensing topologies. |
| UGATE1–UGATE2 / UGATE1_NB / PWM3–PWM4 / PWM2_NB–PWM3_NB | High-side gate drive outputs | Drive external N-channel MOSFETs; UGATE outputs deliver 2A peak source/sink with <60ns dead time control for ZVS optimization. |
| LGATE1–LGATE2 / LGATE1_NB | Low-side gate drive outputs | Directly drive synchronous rectifier MOSFETs; LGATE sink capability up to 4A ensures fast turn-off and reduced conduction losses. |
| VSEN / VSEN_NB / RTN | Differential remote voltage sense inputs | Connect to CPU die sense points to eliminate PCB IR drop error; RTN serves as common return for both VRs. |
| SVC / SVD / SVT / PWROK | SVI 2.0 interface signals | Enable closed-loop communication with AMD CPU: SVC (clock), SVD (bidirectional data), SVT (telemetry), PWROK (system power-good handshake). |
| PGOOD / PGOOD_NB | Open-drain power-good indicators | Signal valid regulation to system logic; require external pull-up to VDD or 3.3V; assert after soft-start and voltage lock. |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Adaptively adjusts switching frequency during load transients to reduce settling time by >30% vs fixed-frequency PWM while improving light-load efficiency. |
| Dual Independent VR Control | Simultaneously manages Core and Northbridge power rails with separate feedback loops, load line programming, and current monitoring-no external coordination required. |
| Programmable Phase Configuration | Core VR supports 1–4 phases; Northbridge VR supports 1–3 phases; configured via ISEN pin strapping-enables flexible BOM scaling across SKUs. |
| DCR Temperature Compensation | Uses single NTC thermistor per VR (NTC/NTC_NB) to correct inductor DCR drift over temperature-eliminates need for multiple sense resistors or complex calibration. |
| VID-on-the-Fly Slew Rate Control | Adjustable transition speed between VID codes prevents overshoot/undershoot during dynamic frequency scaling-critical for AMD Turbo Core operation. |
| PMBus/I²C Secondary Interface | I2CLK/I2DATA pins provide optional SMBus/PMBus access for debug, telemetry readback, or firmware updates-complements primary SVI 2.0 bus. |
Applications
| AMD Desktop CPU Core Power | AMD Desktop GPU/Northbridge Power |
|---|---|
Use Scenario: High-performance desktop systems using AMD Fusion APUs requiring tightly regulated, dynamically scaled core voltage (VDDIO/VDDCR) under varying compute loads. IC Role / Device Role / Timing Role: Dual-output multiphase PWM controller managing Core VR with up to 4 phases and Northbridge VR with up to 3 phases via shared SVI 2.0 bus. Use Value: Enables compliance with AMD SVI 2.0 specification, reduces component count vs discrete dual-controller solutions, and delivers ±0.5% voltage accuracy across –10°C to +100°C. | Use Scenario: Motherboard designs integrating AMD A-series or FX-series processors where Northbridge (memory controller, PCIe, display) requires independent, low-noise power regulation. IC Role / Device Role / Timing Role: Provides dedicated Northbridge VR control with differential sensing, programmable load line, and thermal monitoring via NTC_NB input. Use Value: Eliminates need for separate Northbridge controller IC; allows shared gate driver supply (VDDP) and thermal management infrastructure with Core VR. |
| Desktop Platform Power Management | Thermal-Aware Voltage Regulation |
Use Scenario: OEM motherboard designs targeting energy efficiency certifications (e.g., ENERGY STAR) requiring dynamic voltage/frequency scaling and precise load-line implementation. IC Role / Device Role / Timing Role: Implements AMD-defined load line slope with dynamic trim, VID offset programming, and telemetry-enabled current/voltage reporting via IMON/SVT pins. Use Value: Supports real-time power state transitions (C-states), reduces idle power via diode emulation mode, and enables firmware-level thermal throttling coordination. | Use Scenario: Systems operating in thermally constrained environments (e.g., small-form-factor PCs, all-in-one desktops) where VR temperature directly impacts CPU performance limits. IC Role / Device Role / Timing Role: Monitors Core and Northbridge VR temperatures via dedicated NTC/NTC_NB inputs and asserts VR_HOT_L open-drain signal to CPU upon thermal overload. Use Value: Provides hardware-level thermal protection synchronized with AMD processor thermal management-prevents silicon damage without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase CPU voltage regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95713HRZ | Same pinout and SVI 2.0 compliance; adds enhanced telemetry resolution and extended temperature range (–40°C to +100°C) for industrial variants. | Targeted at extended-temperature desktop workstations and embedded AMD platforms requiring higher reliability margins. | Select ISL95713HRZ when broader ambient operating range or improved telemetry granularity is required; otherwise ISL95712HRZ remains optimal for standard consumer desktops. |
| RTQ2136BGE | Single-output 6-phase controller with PMBus only (no SVI 2.0); lacks Northbridge VR channel and AMD-specific protocol support. | Applicable only for non-AMD platforms or custom CPU power designs where SVI interface is unnecessary. | Choose RTQ2136BGE only for non-AMD x86 or ARM-based SoC platforms; not a functional substitute for ISL95712HRZ in AMD Fusion desktop implementations. |
Compared with ISL95712HRZ, ISL95713HRZ offers identical functionality with extended thermal rating and telemetry fidelity, while RTQ2136BGE provides higher phase count but omits SVI 2.0 and dual-VR architecture-making it unsuitable for AMD desktop CPU core/Northbridge co-regulation.
Availability
ISL95712HRZ is available at Aetrix Electronics and suitable for AMD Fusion desktop motherboards, high-performance computing platforms, and embedded PC systems requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for ISL95712HRZ 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. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and computing markets.
The ISL95712HRZ belongs to Renesas' AMD-qualified CPU power controller product line, designed specifically 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?
The ISL95712HRZ is rated for an ambient operating temperature range of –10°C to +100°C, with a maximum junction temperature of +125°C. This range aligns with AMD SVI 2.0 desktop platform specifications and supports reliable operation in standard ATX chassis environments with active cooling.
Does the ISL95712HRZ support both DCR and resistor-based current sensing?
Yes, the ISL95712HRZ supports both lossless inductor DCR current sensing and precision resistor current sensing on both Core and Northbridge VR outputs. It includes dedicated ISUMP/ISUMN and ISUMP_NB/ISUMN_NB inputs, plus NTC/NTC_NB thermistor inputs for DCR temperature compensation.
How does the R3™ modulator in the ISL95712HRZ improve transient response?
The R3™ modulator in the ISL95712HRZ dynamically adjusts switching frequency during load transients-increasing frequency for faster response during step-load events and reducing it at light loads for higher efficiency. This eliminates the trade-off between bandwidth and quiescent power seen in fixed-frequency controllers.
Can the ISL95712HRZ be used with non-AMD processors?
No-the ISL95712HRZ is specifically designed for AMD Fusion™ CPUs and requires SVI 2.0 protocol compliance. Its pinout, timing, and register map are optimized for AMD's serial VID interface; it lacks compatibility with Intel VR12/VR13 or generic PMBus-only host controllers without protocol translation.
What package type and lead count does the ISL95712HRZ use?
The ISL95712HRZ uses a 52-lead, 6mm × 6mm QFN package with exposed thermal pad (RoHS-compliant, pkg drawing L52.6x6A). This compact footprint supports high-density desktop motherboard layouts while enabling efficient heat transfer through the bottom-side GND pad.
ISL95712HRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for ISL95712HRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95712HRZ 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 reliable?
The price and inventory of ISL95712HRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95712HRZ is usually 5 days.
3.What payment methods are accepted for ISL95712HRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95712HRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95712HRZ?
ISL95712HRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95712HRZ 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?
For technical support, including ISL95712HRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95712HRZ requirements.
6.How does Aetrix verify that ISL95712HRZ is sourced from the original manufacturer or authorized distributors?
All ISL95712HRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL95712HRZ?
All ISL95712HRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95712HRZ, 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 part is unused and in its original packaging.
Return procedure for ISL95712HRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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