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Infineon Technologies CHL8212-03CRT
- Part No.:
- CHL8212-03CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
CHL8212-03CRT.pdf
- Description:
- IC REG BUCK 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,797
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Product details
Overview
CHL8212-03CRT from Infineon Technologies is a dual-output digital multi-phase buck controller supporting 2/3/4+1-phase PWM operation for GPU voltage regulation, featuring I²C configuration & telemetry, IR Adaptive Transient Algorithm (ATA), and Dynamic Phase Control (DPC) with 200 kHz–1.2 MHz per-phase switching frequency, operating from 3.3 V ±10%/−15% supply at 0°C to 85°C in a 28-pin 5×5 mm QFN package.
For engineers reviewing the CHL8212-03CRT datasheet, CHL8212-03CRT pinout, CHL8212-03CRT application, or CHL8212-03CRT equivalent, key selection criteria include dual-loop independent frequency programming, VID-select-driven dynamic voltage transitions, thermal protection with VRHOT# flag, and MTP-based custom configuration storage for GPU VRD systems.
Technical Context
The CHL8212 implements two independent synchronous buck control loops with programmable phase counts (2/3/4+1), each supporting IR Efficiency Shaping via DPC and Active Diode Emulation at light load. Its non-linear digital PWM engine executes ATA to reduce bulk capacitance requirements by dynamically adjusting duty cycle response during transients.
I²C interface enables full register access for configuration, telemetry, and security features including pin-enabled security enable and programmable address. The device integrates thermistor-based temperature sensing, per-loop OVP/UVP/OCP, and slow-OCP for TDC compliance - all managed through on-chip MTP memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-loop digital multi-phase synchronous buck controller |
| Phase Support | 2/3/4+1 phases per loop; independent phase assignment |
| Switching Frequency | 200 kHz to 1.2 MHz per phase, programmable independently |
| I²C Interface | Configurable address, security enable pin, telemetry readback |
| VID Select Lines | 3-bit parallel bus for fast dynamic voltage transition selection |
| Protection Features | Per-loop OVP/UVP/OCP, slow-OCP for TDC, OTP, VRHOT# flag |
| Package | 28-pin QFN, 5 mm × 5 mm, 0.5 mm pitch, RoHS-compliant |
Pinout & Package
CHL8212-03CRT is housed in a 28-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Figure 3 of the August 2013 datasheet (V1.6).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM2 | Gate drive outputs (Loop 1) | Drive high-side MOSFETs for first buck loop; support 3.3 V tri-state drivers |
| PWM_L2 | Gate drive output (Loop 2) | Drives high-side MOSFET for second buck loop; independent timing control |
| VSEN / VSEN_L2 | Output voltage sense inputs | Differential remote sensing per loop; enables precise VRD regulation |
| ISEN1–ISEN2 / ISEN_L2 | Current sense inputs | Supports DCR or discrete shunt sensing per phase; feeds ATA and OCP |
| VIDSEL0–VIDSEL2 | Dynamic voltage select lines | 3-bit parallel bus selecting pre-stored VID codes for rapid VOUT changes |
| SMB_DAT / SMB_CLK | I²C bidirectional data/clock | Enable full register read/write, telemetry, and secure configuration |
| VRHOT# | Thermal alert flag | Open-drain active-low signal indicating thermistor-based overtemperature condition |
| VCC / GND | Power supply pins | 3.3 V ±10%/−15% input; dedicated ground planes for analog/digital/power domains |
Key Features
| Feature | Design Value |
|---|---|
| IR Adaptive Transient Algorithm (ATA) | Proprietary non-linear digital PWM reduces required bulk capacitance by >30% vs fixed-gain controllers |
| Dynamic Phase Control (DPC) | Automatically adds/drops phases based on real-time load current, enabling 1-phase + diode emulation mode |
| Multiple Time Programmable (MTP) memory | Stores custom configurations (VID tables, protection thresholds, ATA parameters), eliminating external EEPROM |
| Independent loop switching frequencies | Each loop configurable from 200 kHz to 1.2 MHz, allowing optimization for efficiency vs EMI in heterogeneous loads |
| I²C security enable pin | Hardware-gated access to configuration registers prevents unauthorized writes during system runtime |
Applications
| GPU Core Voltage Regulation | GDDR Memory Rail Control |
|---|---|
Use Scenario: Regulating core voltage for discrete GPUs under dynamic compute workloads with rapid load steps up to 100 A/µs. IC Role / Device Role / Timing Role: Dual-loop controller managing separate 4+1-phase and 3-phase rails with synchronized ATA response. Use Value: ATA minimizes bulk capacitor count by 40%, reducing PCB area and BOM cost while maintaining <±10 mV transient deviation. | Use Scenario: Powering GDDR6/GDDR6X memory subsystems requiring tight voltage accuracy and fast transient recovery. IC Role / Device Role / Timing Role: Secondary loop delivers stable 1.35 V rail with independent 800 kHz switching and VID-select voltage scaling. Use Value: DPC extends light-load efficiency to >90% at 100 mA, meeting JEDEC GDDR6 power-down specifications. |
| Multi-Rail VRD Reference Designs | Overclocking-Enabled Graphics Platforms |
Use Scenario: Reference board implementation for AMD/NVIDIA GPU reference designs requiring VRD 13.0/14.0 compliance. IC Role / Device Role / Timing Role: Primary digital controller with MTP-stored VRD profiles, SMBus telemetry, and VRHOT# thermal coordination. Use Value: Eliminates need for external configuration ICs; reduces design cycle time by enabling "set-and-forget" deployment. | Use Scenario: Enabling user-controlled overclocking via software-defined voltage override and Vmax limiting. IC Role / Device Role / Timing Role: I²C-configurable voltage ceiling and adaptive loop gain adjustment during sustained boost conditions. Use Value: Supports safe overclocking up to +150 mV beyond nominal VID without compromising OCP or thermal shutdown margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop GPU buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CHL8213-00CRT | 40-pin 6×6 mm QFN; adds TSEN1/TSEN2, IRTN_L2, and enhanced thermal monitoring | Required for platforms needing dual thermistor inputs and VRHOT# assertion with higher thermal resolution | Select when board layout allows larger footprint and thermal telemetry granularity is critical |
| CHL8225-00CRT | Analog multi-phase controller; no I²C/MTP; fixed-frequency operation; footprint-compatible analog/power signals | Suitable for cost-sensitive legacy GPU designs lacking digital telemetry or firmware update capability | Choose only if digital configurability, ATA, or DPC are not required and analog loop tuning is acceptable |
Compared with CHL8213-00CRT, CHL8212-03CRT offers identical control algorithms and feature set in a smaller 28-pin QFN but omits secondary thermistor sensing; versus CHL8225-00CRT, it trades analog simplicity for digital flexibility, telemetry, and adaptive transient response - critical for modern GPU VRD compliance.
Availability
CHL8212-03CRT is available at Aetrix Electronics and suitable for GPU core regulation, GDDR memory rail control, and multi-rail VRD reference designs requiring stable component supply across production lifecycles.
Supply support for CHL8212-03CRT 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 conversion and silicon carbide solutions.
The CHL82xx family was designed specifically for high-performance GPU voltage regulation modules (VRMs), delivering digital precision, thermal intelligence, and platform differentiation for graphics card manufacturers and reference design houses.
FAQ
What is the maximum supported phase count per loop for CHL8212-03CRT?
CHL8212-03CRT supports up to 4+1 phases per loop - four active high-side drives plus one additional phase that can be enabled for peak current handling. This configuration is implemented using PWM1–PWM2 and PWM_L2 outputs with external driver staging, and is fully managed by the on-chip DPC logic without external sequencing components.
Does CHL8212-03CRT require an external EEPROM for configuration storage?
No. CHL8212-03CRT integrates Multiple Time Programmable (MTP) memory that stores all configuration registers, VID tables, protection thresholds, and ATA parameters. This eliminates the need for external non-volatile memory and simplifies board layout while ensuring configuration persistence across power cycles.
Can CHL8212-03CRT operate with both DCR and shunt-based current sensing?
Yes. The ISEN1, ISEN2, and ISEN_L2 inputs accept either DCR voltage drop across low-side MOSFETs or discrete shunt resistor signals. Internal gain and offset calibration registers allow precise current measurement scaling for both methods, and the values feed directly into ATA, OCP, and DPC decision logic.
Is VRHOT# asserted based on die temperature or external thermistor reading?
VRHOT# is asserted solely based on external thermistor input via the TSEN1 pin. The CHL8212-03CRT does not monitor its own junction temperature; instead, it reads analog voltage from a standard NTC thermistor network connected to TSEN1 and triggers VRHOT# when the calculated temperature exceeds the MTP-programmed threshold (default 105°C).
CHL8212-03CRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 3
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 3.3V
- Frequency - Switching:
- 200kHz ~ 1.2MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- I2C
- Control Features:
- Enable
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-28-902
CHL8212-03CRT FAQ
1.How can I place an order for CHL8212-03CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8212-03CRT 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 CHL8212-03CRT reliable?
The price and inventory of CHL8212-03CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8212-03CRT is usually 5 days.
3.What payment methods are accepted for CHL8212-03CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8212-03CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8212-03CRT?
CHL8212-03CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8212-03CRT 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 CHL8212-03CRT?
For technical support, including CHL8212-03CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8212-03CRT requirements.
6.How does Aetrix verify that CHL8212-03CRT is sourced from the original manufacturer or authorized distributors?
All CHL8212-03CRT 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 CHL8212-03CRT meets industry standards.
7.What is the process for return or replacement of CHL8212-03CRT?
All CHL8212-03CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8212-03CRT, 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 CHL8212-03CRT part is unused and in its original packaging.
Return procedure for CHL8212-03CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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