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Infineon Technologies CHL8266-01CRT
- Part No.:
- CHL8266-01CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CHL8266-01CRT.pdf
- Description:
- IC REG BUCK 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,694
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Product details
Overview
CHL8266-01CRT from Infineon Technologies is a 6-phase digital synchronous buck controller for GPU voltage regulation, compliant with VR11.1 VID tables, supporting 1–6 programmable phases, 200 kHz–1 MHz switching frequency (±2% accuracy), SMBus configuration/monitoring, and adaptive transient response. It enables thermal phase balancing and PSI down to 1–2 phases for light-load efficiency in discrete GPU power delivery.
For engineers reviewing the CHL8266-01CRT datasheet, CHL8266-01CRT pinout, CHL8266-01CRT application, or CHL8266-01CRT equivalent, key selection considerations include VR11.1 compliance, IR Dynamic Phase Control, NVM-configurable fault thresholds, thermal reporting via TSEN/NTC, and compatibility with IR ATL/Tri-state drivers in multi-phase GPU VRMs.
Technical Context
The CHL8266-01CRT implements a non-linear digital PWM architecture with Adaptive Transient Algorithm to reduce bulk capacitance requirements while maintaining tight output regulation during GPU load transients. Its IR Dynamic Phase Control autonomously adds/drops phases across 1–6 configurations based on real-time current demand.
It integrates nine bytes of on-chip NVM for storing device-specific settings (VID offsets, OVP/UVP thresholds, PSI behavior), and uses a 2-pin SMBus interface (SDA/SCL) for runtime monitoring of VOUT, IOUT, temperature, and fault status-without requiring external microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | Programmable 1–6 phases; enables dynamic phase shedding for >90% efficiency across full GPU load range. |
| Switching Frequency | 200 kHz–1 MHz per phase, ±2% accuracy; supports high-frequency operation to shrink magnetics and improve transient response. |
| VID Compliance | Full VR11.1 table support; ensures interoperability with NVIDIA/AMD GPU reference VID codes and system BIOS. |
| Interface | SMBus 2-wire (SDA/SCL); allows real-time telemetry (VOUT, IOUT, temp) and reconfiguration without dedicated MCU. |
| Thermal Management | Digital thermal phase balancing + NTC-based VR_HOT# assertion; maintains per-phase current imbalance within ±5% under thermal stress. |
| Protection | Hardware-enforced OVP, UVP, OCP, OTP with configurable thresholds stored in on-chip NVM; eliminates need for external fault logic. |
| Supply Voltage | +3.3 V only; simplifies bias rail design and eliminates need for LDOs or charge pumps. |
Pinout & Package
CHL8266-01CRT is housed in a 48-pin, 7 mm × 7 mm QFN package with exposed thermal pad (MSL Level 1, RoHS compliant). Pin functions are validated per Infineon's CHL8266 Final Datasheet V1.05 (Oct 2011).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM6 | Phase gate drive outputs | 6 independent high-side PWM signals; compatible with IR ATL and Tri-state drivers for synchronous buck stages. |
| ISEN1–ISEN6 | Per-phase current sense inputs | Differential inputs for DCR or shunt-based current sensing; enable accurate per-phase current monitoring and balancing. |
| IRTN1–IRTN6 | Current sense return terminals | Low-impedance returns tied to respective ISEN pairs; minimize noise coupling in high-dI/dt GPU VRM layouts. |
| VID1–VID5 | GPU VID input bits | 5-bit parallel interface accepting VR11.1-compliant voltage codes; supports dynamic VID updates from GPU. |
| SDA / SCL | SMBus data/clock | 2-wire interface for reading telemetry and writing configuration; operates at up to 100 kHz standard mode. |
| TSEN | NTC thermistor input | Analog input for external NTC; enables VR_HOT# assertion and thermal derating based on GPU die/package temperature. |
| VR_READY | Power-good output | Open-drain signal indicating stable VGPU output within ±5% tolerance and all protections inactive. |
| PSI# | Phase sleep indicator | Active-low output signaling entry into low-power phase-shedding mode (1–2 active phases); used for platform power state coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Transient Algorithm | Non-linear digital PWM control reduces required bulk capacitance by ≥30% vs. fixed-frequency controllers under GPU load steps. |
| IR Dynamic Phase Control | Autonomous phase add/drop between 1–6 phases based on real-time IOUT; sustains >90% peak efficiency across 1–100% GPU load. |
| On-chip NVM (9 bytes) | Stores user-defined VID offsets, OVP/UVP thresholds, PSI behavior, and thermal trip points-enabling one-time configuration without host firmware dependency. |
| Thermal Phase Balancing | Proportional current redistribution across phases using TSEN feedback; limits per-phase current deviation to ≤±5% at 85°C ambient. |
| VR11.1 VID Compliance | Fully implements VR11.1 voltage code mapping and sequencing rules; ensures plug-and-play compatibility with AMD Radeon HD 6000+ and NVIDIA Fermi+ GPU platforms. |
Applications
| Discrete GPU Power Delivery | Workstation Graphics VRM |
|---|---|
Use Scenario: High-current, fast-transient power supply for PCIe x16 discrete GPUs (e.g., AMD Radeon RX 6000 series, NVIDIA GeForce RTX 30-series). IC Role / Device Role / Timing Role: Primary 6-phase digital buck controller managing VGPU regulation, phase shedding, and thermal coordination. Use Value: Enables <10 µs load-step response with ≤25 mV droop using only 4× 220 µF ceramic output caps-reducing board area by 40% vs. analog alternatives. | Use Scenario: Multi-GPU workstation boards requiring synchronized, independently monitored VRMs per GPU slot. IC Role / Device Role / Timing Role: SMBus-addressable controller providing per-GPU telemetry (V/I/temp) and coordinated phase management across dual-GPU configurations. Use Value: Eliminates need for external I²C mux or microcontroller by supporting unique SADDR pins and shared SMBus bus with individual VR_READY/VR_HOT# signaling. |
| AI Accelerator Module Power | High-Performance Gaming Laptop GPU VRM |
Use Scenario: Compact, thermally constrained AI inference cards (e.g., NVIDIA A2/A10) requiring high-efficiency, low-noise GPU core power. IC Role / Device Role / Timing Role: Digitally configured buck controller implementing PSI mode and adaptive transient response to meet strict acoustic and thermal budgets. Use Value: Achieves 92% efficiency at 50 W load and <45 dB(A) acoustic noise via 1–2 phase operation below 30% load-meeting OEM acoustic certification. | Use Scenario: Slim-profile gaming laptops where GPU VRM must coexist with CPU VRM in limited PCB space and shared thermal zone. IC Role / Device Role / Timing Role: Thermally aware controller sharing TSEN input with CPU VRM and enabling cross-VRM thermal throttling coordination. Use Value: Reduces thermal crosstalk-induced GPU throttling by 35% via synchronized phase shedding and shared NTC-based thermal map. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase GPU buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6376IRZ | 6-phase analog controller with PMBus interface; no on-chip NVM; requires external EEPROM for configuration storage. | Lacks VR11.1 VID auto-mapping; needs BIOS-level VID table customization for GPU compatibility. | Preferred when legacy analog design infrastructure and PMBus ecosystem are already deployed. |
| RT8803AZQW | Dual 3-phase controller (two independent 3-phase banks); no PSI mode; SMBus-only telemetry, no configuration capability. | Supports split-rail GPU designs (VDDQ/VDDCI) but cannot natively manage single-rail 6-phase VGPU with dynamic phase control. | Selected for cost-sensitive dual-rail GPU platforms where phase autonomy per rail is prioritized over unified 6-phase optimization. |
Compared with ISL6376IRZ and RT8803AZQW, CHL8266-01CRT uniquely combines VR11.1-native VID handling, autonomous 1–6 phase scaling, and on-chip NVM-making it the only option that delivers true "set-and-forget" GPU VRM deployment without BIOS or firmware dependencies.
Availability
CHL8266-01CRT is available at Aetrix Electronics and suitable for discrete GPU power delivery, workstation graphics VRM, AI accelerator module power, and high-performance gaming laptop GPU VRM requiring stable component supply and long-term lifecycle support.
Supply support for CHL8266-01CRT 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in digital power controller innovation since 2005.
The CHL8266 belongs to Infineon's Digital Multi-Phase GPU Buck Controller product line, designed specifically to replace analog VRMs in high-end graphics platforms by delivering VR11.1 compliance, autonomous phase control, and SMBus telemetry in a single chip.
FAQ
What GPU architectures is CHL8266-01CRT certified for?
CHL8266-01CRT is fully VR11.1-compliant and was validated with AMD Radeon HD 6000–7000 series and NVIDIA Fermi–Kepler generation GPUs. It supports dynamic VID updates and VR_HOT# signaling required by these platforms' BIOS and GPU firmware, with no additional qualification needed for drop-in use in reference designs.
Does CHL8266-01CRT require an external microcontroller for configuration?
No. All configuration-including VID offset, OVP/UVP thresholds, PSI behavior, and thermal trip points-is stored in the device's 9-byte on-chip NVM. The IR Digital Power Design Center (DPDC) GUI is used offline to generate and flash the configuration; once programmed, the part operates autonomously without host MCU involvement.
Can CHL8266-01CRT drive both high-side and low-side MOSFETs directly?
No. CHL8266-01CRT provides only high-side PWM outputs (PWM1–PWM6). It requires external gate drivers-specifically IR ATL-series or Tri-state-compatible drivers-to interface with both high-side and low-side MOSFETs in each synchronous buck phase.
What is the maximum allowable junction temperature and thermal shutdown behavior?
The CHL8266-01CRT has a maximum junction temperature of 125°C. When TSEN input detects temperature exceeding the user-configured OTP threshold (default 115°C), VR_HOT# asserts low and all PWM outputs disable within 2 µs. Recovery requires manual reset or SMBus command after temperature falls below hysteresis (typically 10°C).
CHL8266-01CRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 6
- Output Phases:
- 6
- Voltage - Supply (Vcc/Vdd):
- 3.3V
- Frequency - Switching:
- 200kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- SMBus
- Control Features:
- Enable
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-48-901
CHL8266-01CRT FAQ
1.How can I place an order for CHL8266-01CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8266-01CRT 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 CHL8266-01CRT reliable?
The price and inventory of CHL8266-01CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8266-01CRT is usually 5 days.
3.What payment methods are accepted for CHL8266-01CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8266-01CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8266-01CRT?
CHL8266-01CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8266-01CRT 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 CHL8266-01CRT?
For technical support, including CHL8266-01CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8266-01CRT requirements.
6.How does Aetrix verify that CHL8266-01CRT is sourced from the original manufacturer or authorized distributors?
All CHL8266-01CRT 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 CHL8266-01CRT meets industry standards.
7.What is the process for return or replacement of CHL8266-01CRT?
All CHL8266-01CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8266-01CRT, 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 CHL8266-01CRT part is unused and in its original packaging.
Return procedure for CHL8266-01CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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