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Infineon Technologies CHL8225-02CRT
- Part No.:
- CHL8225-02CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8225-02CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,775
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Product details
Overview
CHL8225-02CRT from CHiL Semiconductor is a dual-loop digital multi-phase buck controller supporting up to 5 phases (Loop 1) and configurable phase assignment across two independent VR outputs, with I²C/SMBus/PMBus telemetry, 200kHz–1.2MHz switching frequency, and adaptive transient algorithm for GPU voltage regulation.
For engineers reviewing the CHL8225-02CRT datasheet, CHL8225-02CRT pinout, CHL8225-02CRT application, or CHL8225-02CRT equivalent, key selection criteria include per-loop OVP/UVP/OCP/OTP protection, dynamic phase control down to 1-phase + active diode emulation, CHiL Efficiency Shaping features, NVM-based configuration storage, and compatibility with coupled inductors and 3.3V tri-state drivers.
Technical Context
The CHL8225-02CRT implements a dual-loop architecture with independent PWM control for two output rails-Loop 1 supports up to 5 phases, Loop 2 supports up to 3 phases (flexibly assigned), and both loops feature real-time current sensing via 8 dedicated ISEN inputs. It uses proprietary non-linear digital PWM for its Adaptive Transient Algorithm (ATA), reducing bulk capacitor count.
Input Voltage Management monitors up to three input sources (VINSEN, VINSEN_AUX1, VINSEN_AUX2); dynamic voltage control is executed via 2-bit parallel VID interface with Gamer Mode override and VMAX setting; fault response includes VRHOT_ICRIT# assertion and thermistor-based temperature sensing with TSEN/TSEN2 inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-loop digital multi-phase synchronous buck controller |
| Max Phases per Loop | Loop 1: 5 phases; Loop 2: 3 phases (flexible assignment) |
| Switching Frequency | 200 kHz to 1.2 MHz - adjustable per loop for efficiency vs. transient trade-off |
| Interface | I²C/SMBus/PMBus - enables telemetry of voltage, current, temperature, power per loop |
| Fault Protection | Per-loop OVP, UVP, OCP, OTP - autonomous shutdown with VRHOT_ICRIT# alert signal |
| Light-Load Modes | Programmable 1-phase or 2-phase operation + active diode emulation - reduces gate loss at sub-1A loads |
| Memory | On-chip non-volatile memory (NVM) - stores custom configuration without external EEPROM |
Pinout & Package
CHL8225-02CRT is housed in a 6×6 mm, 40-pin QFN package with exposed thermal pad (RoHS-compliant, Pb-free). Pin functions are validated per CHiL Semiconductor PB0008 Rev 1.0 Figure 1 top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM5 | Phase gate drive outputs | Drive high-side MOSFETs for up to 5 phases in Loop 1 |
| ISEN1–ISEN5 | Current sense inputs | Connect to phase current sense resistors for real-time per-phase current monitoring |
| VINSEN / VINSEN_AUX1 / VINSEN_AUX2 | Input voltage sensing inputs | Monitor up to three independent input rails for Input Voltage Management |
| SMB_CLK / SMB_DIO | I²C/SMBus interface pins | Enable bidirectional telemetry and configuration over standard system management bus |
| VRHOT_ICRIT# | Open-drain fault alert | Asserts low on critical thermal or current fault - connects directly to system interrupt line |
Key Features
| Feature | Design Value |
|---|---|
| CHiL Adaptive Transient Algorithm (ATA) | Proprietary non-linear digital PWM reduces required bulk capacitance by >30% vs. fixed-frequency controllers |
| Variable Gate Drive (VAR_GATE) | Dynamically adjusts gate drive voltage based on real-time load current to minimize MOSFET switching loss |
| Dynamic Phase Control | Adds/drops phases in real time - maintains >90% efficiency from 5% to 100% load range |
| Coupled Inductor Mode | Enables phase pairing (e.g., PWM1+PWM2) for improved transient response and smaller magnetics footprint |
| Gamer Mode Override | Hardware-selectable VID mode bypasses software control for deterministic low-latency voltage transitions |
Applications
| GPU Core Voltage Regulation | GPU Memory I/O Voltage Regulation |
|---|---|
Use Scenario: High-performance discrete graphics cards requiring fast load-step response and tight voltage accuracy under dynamic gaming workloads. IC Role / Device Role / Timing Role: Dual-loop controller managing separate GPU core (V_GPU_L1) and memory I/O (V_GPU_L2) rails with independent phase allocation and transient optimization. Use Value: ATA algorithm cuts bulk capacitor count by 3–5 units per rail while maintaining <±10 mV regulation during 50 A/µs load steps. | Use Scenario: Multi-GPU server platforms where GPU memory subsystems demand stable 1.2–1.8 V supplies with coordinated sequencing and telemetry. IC Role / Device Role / Timing Role: Secondary VR loop (Loop 2) delivering precise, monitored power to GDDR6/GDDR6X memory interfaces with independent OVP/UVP thresholds. Use Value: Per-loop SMBus telemetry enables real-time memory rail health monitoring and predictive thermal throttling via VRHOT2 signal. |
| AI Accelerator Power Delivery | High-Density Compute Blade VRM |
Use Scenario: Datacenter AI accelerators (e.g., NVIDIA A100/H100 derivatives) with asymmetric power demands between compute and interconnect domains. IC Role / Device Role / Timing Role: Configured with 4 phases on Loop 1 (compute core) and 1 phase on Loop 2 (NVLink/CXL I/O), sharing single CHL8225-02CRT die. Use Value: Flexible phase assignment eliminates need for dual-controller designs, reducing BOM cost and PCB area by ~22 mm². | Use Scenario: 1U edge servers with space-constrained VRMs powering multiple CPU/GPU modules from shared 12 V input rails. IC Role / Device Role / Timing Role: Input Voltage Management monitors three sources (main 12 V, aux 12 V_1, aux 12 V_2) to ensure uninterrupted power during hot-swap events. Use Value: Automatic input source arbitration prevents brownout during redundant PSU transitions without host intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop multi-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6377IRZ-T | Single-loop 7-phase controller; no native dual-loop support; requires external logic for second rail | Lacks integrated Loop 2 telemetry and phase-flexible assignment; limited to single-rail GPU core use | Select when only one high-current rail is needed and cost sensitivity outweighs telemetry requirements |
| TPS53679RSAT | 6-phase dual-loop controller with PMBus v1.3; no ICRITICAL monitor or coupled inductor mode | Supports dual rails but lacks CHiL's ATA algorithm and active diode emulation below 0.5 A | Select when PMBus v1.3 compliance and TI ecosystem integration are prioritized over ultra-light-load efficiency |
Compared with ISL6377IRZ-T and TPS53679RSAT, CHL8225-02CRT uniquely delivers per-loop NVM configuration, hardware-gated Gamer Mode, and coupled inductor optimization-enabling lower system cost, faster transient response, and higher light-load efficiency in space-constrained GPU/AI platforms.
Availability
CHL8225-02CRT is available at Aetrix Electronics and suitable for GPU voltage regulation, AI accelerator power delivery, and high-density compute blade VRM applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CHL8225-02CRT 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
CHiL Semiconductor Corp., headquartered in Tewksbury, MA, specializes in digitally controlled power management ICs for high-performance computing and graphics applications.
The CHL8225 product line targets GPU and AI accelerator VRMs, emphasizing adaptive transient response, multi-input voltage resilience, and NVM-based configurability to reduce design cycle time and system-level component count.
FAQ
What is the function of the VRHOT_ICRIT# pin?
VRHOT_ICRIT# is an open-drain fault alert signal that asserts low during critical thermal events (via TSEN/TSEN2) or overcurrent conditions detected by the ICRITICAL monitor circuit. It connects directly to system interrupt lines and supports hardware-initiated throttling or shutdown without software polling.
Does CHL8225-02CRT require external configuration before first power-up?
Yes. CHL8225-02CRT ships unprogrammed (default configuration file 00) and will not initiate startup until configured via I²C/SMBus using CHiL Intuitive Power Designer (IPD) GUI. This ensures safe power-up by preventing undefined voltage settings.
Can CHL8225-02CRT operate with standard discrete MOSFETs or does it require CHiL-specific drivers?
CHL8225-02CRT is compatible with standard 3.3 V tri-state gate drivers (e.g., CHL8510) and does not require proprietary drivers. Its VAR_GATE output supports external variable gate drive circuits but operates fully with fixed 12 V high-side and 5 V low-side drive when configured accordingly.
How does Input Voltage Management improve system reliability?
Input Voltage Management continuously monitors up to three independent input sources (VINSEN, VINSEN_AUX1, VINSEN_AUX2) and triggers automatic rail switchover or fault alerts if any falls below programmable thresholds-preventing undervoltage lockout during redundant PSU transitions or cable faults in multi-rail server platforms.
CHL8225-02CRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 5
- Output Phases:
- 5
- Voltage - Supply (Vcc/Vdd):
- 3.3V
- Frequency - Switching:
- 200kHz ~ 1.2MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- I2C, PMBus, SMBus
- Control Features:
- Enable
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-40-902
CHL8225-02CRT FAQ
1.How can I place an order for CHL8225-02CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8225-02CRT 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 CHL8225-02CRT reliable?
The price and inventory of CHL8225-02CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8225-02CRT is usually 5 days.
3.What payment methods are accepted for CHL8225-02CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8225-02CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8225-02CRT?
CHL8225-02CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8225-02CRT 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 CHL8225-02CRT?
For technical support, including CHL8225-02CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8225-02CRT requirements.
6.How does Aetrix verify that CHL8225-02CRT is sourced from the original manufacturer or authorized distributors?
All CHL8225-02CRT 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 CHL8225-02CRT meets industry standards.
7.What is the process for return or replacement of CHL8225-02CRT?
All CHL8225-02CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8225-02CRT, 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 CHL8225-02CRT part is unused and in its original packaging.
Return procedure for CHL8225-02CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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