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Renesas ISL6265CIRTZ-T
- Part No.:
- ISL6265CIRTZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
ISL6265CIRTZ-T.pdf
- Description:
- IC REG CTRLR AMD 3OUT 48TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL6265CIRTZ-T from Renesas (formerly Intersil) is a multi-output voltage regulator controller with integrated MOSFET drivers, designed specifically for AMD SVI-capable mobile CPUs. It delivers three independent output channels - two configurable as dual-phase or single-phase core regulators (VDD0/VDD1), and one dedicated Northbridge regulator (VDDNB) - with 0.5% system voltage accuracy over temperature, R3 Technology™ modulator for fast transient response, and differential remote CPU die sensing.
For engineers reviewing the ISL6265CIRTZ-T datasheet, ISL6265CIRTZ-T pinout, ISL6265CIRTZ-T application, or ISL6265CIRTZ-T equivalent, this page provides verified technical context on its AMD Griffin platform support, SVI interface operation, DCR-based current sensing, phase-shedding capability in PSI_L mode, and 48-pin TQFN package implementation.
Technical Context
The ISL6265CIRTZ-T implements Renesas' patented R3 Technology™ modulator, enabling variable-frequency control during load transients to achieve faster regulation than fixed-frequency buck controllers. Its Serial VID (SVI) interface supports bidirectional I²C-compatible communication with AMD processors for dynamic voltage adjustment between 0.500V and 1.55V in 12.5mV steps.
It supports dual-plane (independent VDD0/VDD1) or uniplane (interleaved two-phase) core configurations, with Northbridge channel operating independently. Core outputs feature lossless DCR current sensing, while Northbridge uses rDS(ON) sensing; all channels include overvoltage, undervoltage, and overcurrent protection with programmable thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | Three independent channels: two core (VDD0/VDD1) + one Northbridge (VDDNB); configurable as dual single-phase or interleaved two-phase core. |
| System Voltage Accuracy | ±0.5% over -40°C to +100°C ambient for VDD0/VDD1/VDDNB at 0.75V–1.55V range; enables tight compliance with AMD mobile CPU VR requirements. |
| SVI Interface Range | 0.500V to 1.55V in 12.5mV steps; supports dynamic VID-on-the-fly transitions at 5–10 mV/µs for adaptive power states. |
| Switching Frequency | Core: 200–500 kHz (user-programmable via VW pins); Northbridge: 200–500 kHz (via FSET_NB); enables optimization of efficiency vs. size trade-offs. |
| Gate Drive Capability | 2A sink/source per UGATE/LGATE; low RDS(ON) driver stages reduce switching losses and support high-efficiency discrete MOSFETs. |
| Current Sensing | Core: differential DCR sensing (ISPx/ISNx); Northbridge: rDS(ON) sensing (OCSET_NB); eliminates sense resistor power loss and improves thermal performance. |
| Protection Features | Programmable OCP (via OCSET/OCSET_NB), OV/UV lockout, PGOOD monitoring, and shoot-through prevention - ensures robust operation under fault conditions. |
Pinout & Package
ISL6265CIRTZ-T is housed in a RoHS-compliant, thermally enhanced 48-lead 6×6 mm TQFN package (PKG DWG # L48.6x6) with exposed thermal pad. Operating ambient temperature range is -40°C to +100°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OFS/VFIXEN | Selects offset voltage generation (OFS mode) or enables fixed-voltage DAC decoding (VFIX mode) based on external logic level. |
| 2 | PGOOD | Open-drain power-good indicator; asserts high only when all outputs are within OV/UVP limits and no OCP event is active. |
| 3 | PWROK | System-level enable signal; gates SVI interface activation and determines pre-PWROK VID configuration per AMD guidelines. |
| 4–5 | SVD, SVC | Bi-directional SVI data and clock lines; implement I²C-compatible protocol for real-time voltage programming with AMD processors. |
| 6 | ENABLE | Digital master enable input; high = active regulation, low = shutdown with µA-level quiescent current. |
| 15–16, 17–18, 42–43 | VSEN0/RTN0, VSEN1/RTN1, VSEN_NB/RTN_NB | Differential remote sense inputs for VDD0, VDD1, and VDDNB; connect directly to CPU sense pads for die-level voltage regulation. |
| 13–14, 23–24, 31–32, 29–28, 39–40 | ISP0/ISN0, ISP1/ISN1, LGATE0/PGND0, LGATE1/PGND1, LGATE_NB/PGND_NB | Current-sense and lower-gate drive return paths; enable accurate DCR/rDS(ON)-based current measurement and gate drive integrity. |
| 33–34, 27–26, 38–37 | PHASE0/UGATE0, PHASE1/UGATE1, PHASE_NB/UGATE_NB | High-side switch node and upper gate drive outputs; support bootstrap operation with internal diodes and external capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| R3 Technology™ Modulator | Variable-frequency control during transients reduces voltage deviation by >40% vs. fixed-frequency buck, critical for CPU burst-load response. |
| Dual-Plane / Uniplane Configuration Flexibility | Hardware-selectable topology allows single design to support both AMD dual-VDD and uniplane CPU platforms without PCB change. |
| Differential Remote CPU Die Sensing | Compensates for IR drop across PCB traces and package inductance, ensuring ±0.5% regulation accuracy at actual CPU die location. |
| Lossless Current Sensing | DCR sensing on core outputs and rDS(ON) sensing on Northbridge eliminate power-wasting shunt resistors and associated thermal management. |
| PSI_L Power-Saving Mode Support | Enables phase shedding and reduced switching frequency during light loads, improving efficiency by up to 15% at <10% load. |
| Integrated 2A Gate Drivers | Eliminates need for external driver ICs; reduces BOM count, layout area, and gate-drive loop inductance for improved EMI performance. |
Applications
| AMD Griffin Platform Notebook CPU Regulation | Notebook GPU Core Voltage Regulation |
|---|---|
Use Scenario: Regulating VDD0 and VDD1 for dual-plane AMD Griffin CPUs in thin-and-light notebooks with strict thermal envelope. IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller with independent SVI interface handling per-plane voltage commands and dynamic droop. Use Value: Enables precise 0.5% voltage positioning across temperature, supporting aggressive CPU boost states while maintaining stability under 20A transient loads. |
Use Scenario: Providing tightly regulated core voltage to discrete or integrated GPU in AMD-based gaming notebooks. IC Role / Device Role / Timing Role: Single-phase or interleaved two-phase VR controller using same SVI interface and DCR sensing as CPU core rails. Use Value: Shares firmware and layout resources with CPU VR, reducing validation effort and enabling coordinated power-state transitions with CPU. |
| Northbridge (VDDNB) Power Delivery | Mobile Platform VR12-Compatible Reference Design |
Use Scenario: Delivering stable 1.1V–1.3V to AMD chipset Northbridge under dynamic memory bandwidth loads. IC Role / Device Role / Timing Role: Dedicated third-channel buck controller with rDS(ON) current sensing and independent FSET_NB frequency programming. Use Value: Eliminates need for separate NB controller IC, reducing solution cost and board area while maintaining independent fault isolation. |
Use Scenario: Serving as base controller in OEM reference designs targeting AMD mobile platforms requiring VR12 compliance. IC Role / Device Role / Timing Role: Multi-output controller meeting AMD SVI timing, accuracy, and protection requirements per VR12 specification. Use Value: Accelerates time-to-market with validated schematics, layout guidelines, and thermal design data included in FN6976 datasheet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output CPU voltage regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6265HIRTZ-T | Same architecture and pinout; rated for -10°C to +100°C ambient (vs. -40°C to +100°C for ISL6265CIRTZ-T). | Not suitable for extended industrial or automotive-adjacent environments requiring full -40°C startup. | Select ISL6265CIRTZ-T for designs requiring guaranteed operation at -40°C ambient, especially in ruggedized or wide-temperature notebooks. |
| RTQ2136B-QT | Single-core 3+1 phase controller with integrated drivers; lacks SVI interface and Northbridge channel; uses PMBus instead of AMD-specific protocol. | Requires firmware adaptation for AMD platforms; cannot replace ISL6265CIRTZ-T in SVI-dependent systems without host-side changes. | Consider only for new non-AMD designs where PMBus configurability and AEC-Q200 qualification are prioritized over AMD compatibility. |
Compared with ISL6265HIRTZ-T, ISL6265CIRTZ-T extends cold-start capability to -40°C without sacrificing performance; compared with RTQ2136B-QT, it delivers native AMD SVI support and dedicated Northbridge regulation - essential for drop-in replacement in Griffin-era platforms.
Availability
ISL6265CIRTZ-T is available at Aetrix Electronics and suitable for AMD mobile CPU voltage regulation, notebook GPU core supply, Northbridge power delivery, and VR12-compliant reference designs requiring stable component supply across extended temperature ranges.
Supply support for ISL6265CIRTZ-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 to support its high-performance analog and power management portfolio, including legacy CPU VR controllers.
The ISL6265CIRTZ-T belongs to Intersil's AMD SVI controller product line, engineered specifically for precision multi-rail voltage regulation in mobile computing platforms with stringent transient response and thermal constraints.
FAQ
What is the operating temperature range for the ISL6265CIRTZ-T?
The ISL6265CIRTZ-T is specified for an ambient operating temperature range of -40°C to +100°C, with junction temperature limited to +125°C. This extended range supports deployment in thermally demanding notebook chassis and industrial-edge mobile applications where ambient cooling is constrained. The part's thermal resistance (θJA = 28°C/W) and exposed-pad TQFN package enable reliable operation under sustained 3A–5A per phase loads.
Does the ISL6265CIRTZ-T support AMD SVI2 or only SVI1?
The ISL6265CIRTZ-T supports the original AMD Serial VID (SVI) interface as defined in the AMD Mobile Processor Power Management Guide - commonly referred to as SVI1. It does not support SVI2 features such as enhanced command sets, higher-speed signaling, or additional status registers. The datasheet (FN6976) confirms compatibility with AMD Griffin platform specifications, which predate SVI2 adoption.
Can the ISL6265CIRTZ-T be used in a single-phase-only configuration for VDD0 and VDD1?
Yes, the ISL6265CIRTZ-T supports independent single-phase operation for both VDD0 and VDD1 channels, as confirmed in the "Core Configuration Flexibility" section of the datasheet. In dual-plane mode, each core channel operates autonomously with separate feedback (FB0/FB1), compensation (COMP0/COMP1), and current sensing (ISP0/ISN0, ISP1/ISN1), enabling true independent regulation required by AMD dual-VDD architectures.
What is the purpose of the RTN1 pin on the ISL6265CIRTZ-T?
The RTN1 pin serves a dual function: it acts as the return path for the VDD1 remote sense amplifier (paired with VSEN1), and - prior to ENABLE assertion - detects the VDD_PLANE_STRAP signal to determine whether the CPU is dual-plane or uniplane. This strap detection configures internal logic for appropriate channel mapping and modulator behavior, making RTN1 critical for correct initialization in both platform types.
How is overcurrent protection configured for the Northbridge channel of the ISL6265CIRTZ-T?
Overcurrent protection for the Northbridge channel is set via the OCSET_NB pin: a resistor from OCSET_NB to PHASE_NB establishes the (VISP – VISN) threshold that triggers protection. The datasheet specifies this threshold is proportional to the rDS(ON) of the upper MOSFET and enables lossless current limiting without external sense resistors. Trip response is cycle-by-cycle with automatic restart after fault clearance.
ISL6265CIRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, AMD SVI Capable Mobile CPU
- Voltage - Input:
- 5V ~ 24V
- Number of Outputs:
- 3
- Voltage - Output:
- 0.5V ~ 1.55V
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
ISL6265CIRTZ-T FAQ
1.How can I place an order for ISL6265CIRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6265CIRTZ-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 ISL6265CIRTZ-T reliable?
The price and inventory of ISL6265CIRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6265CIRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL6265CIRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6265CIRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6265CIRTZ-T?
ISL6265CIRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6265CIRTZ-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 ISL6265CIRTZ-T?
For technical support, including ISL6265CIRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6265CIRTZ-T requirements.
6.How does Aetrix verify that ISL6265CIRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL6265CIRTZ-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 ISL6265CIRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL6265CIRTZ-T?
All ISL6265CIRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6265CIRTZ-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 ISL6265CIRTZ-T part is unused and in its original packaging.
Return procedure for ISL6265CIRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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