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Infineon Technologies CHL8214-03CRT
- Part No.:
- CHL8214-03CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8214-03CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,320
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Product details
Overview
CHL8214-03CRT from Infineon Technologies is a dual-output, 4+1-phase digital PWM buck controller for GPU voltage regulation, supporting independent loop switching frequencies up to 1.2 MHz, I²C configuration & telemetry, and IR Adaptive Transient Algorithm (ATA) for bulk capacitor reduction.
For engineers reviewing the CHL8214-03CRT datasheet, CHL8214-03CRT pinout, CHL8214-03CRT application, or CHL8214-03CRT equivalent, key selection criteria include dual-loop phase control granularity, VID-select line count (3), thermal protection with VRHOT# flag, MTP programmability, and QFN-40 package compatibility with CHL8225 analog/power signals.
Technical Context
The CHL8214-03CRT implements two independent digital control loops-Loop 1 (4-phase) and Loop 2 (1-phase)-each configurable from 200 kHz to 1.2 MHz; it uses proprietary non-linear digital PWM for ATA-based transient response optimization and supports dynamic phase shedding via IR Dynamic Phase Control (DPC).
It integrates I²C interface with pin-programmable address and security enable pin, supports 3-bit parallel VID select for fast voltage transitions, and includes thermistor-based temperature sensing with VRHOT# assertion and slow OCP for Thermal Design Current (TDC) compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual-loop: 4+1-phase (Loop 1: 4-phase; Loop 2: 1-phase) for independent GPU core/GDDR rail regulation |
| Switching Frequency Range | 200 kHz – 1.2 MHz per loop; enables optimization of efficiency vs. size trade-off per rail |
| VID Select Lines | 3 lines; supports 8 discrete voltage levels with sub-μs transition for dynamic GPU frequency scaling |
| I²C Interface | Configurable address + security enable pin; enables secure runtime reconfiguration and telemetry readback |
| Protection Features | Per-loop OVP/UVP/OCP, OTP, VRHOT#, and slow OCP for TDC-compliant thermal management |
| Package & Temp | 40-pin QFN (6×6 mm, 0.5 mm pitch); commercial grade (0°C to +85°C) |
| MTP Memory | Multiple Time Programmable storage; retains custom configuration across power cycles without external EEPROM |
Pinout & Package
CHL8214-03CRT is housed in a 40-pin QFN package (6 mm × 6 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pin functions are validated per Figure 1 (CHL8213/14 Package Top View) in the August 2013 V1.6 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM4, PWM_L2 | Phase gate drive outputs | Four dedicated PWM outputs for Loop 1; one for Loop 2 - directly drive external high-side MOSFETs |
| VSEN, VSEN_L2 | Remote voltage sense inputs | Differential sensing per loop; enables accurate load-line regulation at point-of-load |
| ISEN1–ISEN4, ISEN_L2 | Current sense inputs | Per-phase current monitoring for DPC, OCP, and ATA calculation |
| SMB_DAT / SMB_CLK | I²C bidirectional data/clock | Supports configuration, telemetry readback, and real-time voltage/current/temp reporting |
| VRHOT# | Thermal alert output | Open-drain active-low signal triggered by internal thermistor threshold; used for system throttling |
| VIDSEL0–VIDSEL2 | Parallel voltage select inputs | 3-bit bus enabling 8 preprogrammed VID codes; bypasses I²C for ultra-fast voltage changes |
Key Features
| Feature | Design Value |
|---|---|
| IR Adaptive Transient Algorithm (ATA) | Reduces required output bulk capacitance by >40% versus fixed-frequency controllers via non-linear digital PWM response |
| Dynamic Phase Control (DPC) | Automatically scales active phases from 4→1 based on load; enters diode emulation mode below 10% load for >15% light-load efficiency gain |
| Multiple Time Programmable (MTP) memory | Stores full configuration (loop parameters, protection thresholds, VID mapping); eliminates external NVM and reduces BOM count |
| Footprint compatibility with CHL8225 | Shared analog/power signal layout; enables migration path without PCB redesign |
| Thermal protection with VRHOT# | Thermistor-based sensing with user-configurable trip point; provides hardware-level thermal shutdown coordination with GPU |
Applications
| GPU Core Voltage Regulation | GDDR Memory Rail Control |
|---|---|
Use Scenario: High-performance discrete GPU requiring dynamic voltage/frequency scaling (DVFS) during gaming or compute workloads. IC Role / Device Role / Timing Role: Dual-loop controller managing 4-phase core rail (VDDC) and 1-phase auxiliary rail (VDDQ) with synchronized transient response. Use Value: ATA minimizes bulk capacitors by 45%; DPC extends efficiency >90% down to 5% load, reducing heatsink size and system power loss. | Use Scenario: GDDR6/GDDR6X memory subsystem needing tightly regulated, low-noise 1.35V/1.25V supply with fast load-step response. IC Role / Device Role / Timing Role: Dedicated 1-phase loop (Loop 2) delivering precise voltage control with <10 μs transient recovery via adaptive PWM. Use Value: Independent 200–1200 kHz frequency tuning avoids noise coupling into memory timing paths; VRHOT# enables coordinated thermal throttling. |
| Overclocking Platform Power | Multi-GPU Server VRM |
Use Scenario: Enthusiast desktop platform enabling manual GPU overclocking with voltage override and Vmax limiting. IC Role / Device Role / Timing Role: I²C voltage override register + Vmax setting enforces safe ceiling during OC; VIDSEL lines retain fast-switching capability. Use Value: Prevents overvoltage damage during unstable OC states while maintaining sub-50 ns VID transition latency for responsive frequency scaling. | Use Scenario: Dual-GPU server board requiring redundant, independently monitored voltage rails with telemetry aggregation. IC Role / Device Role / Timing Role: Single CHL8214-03CRT manages both GPUs' core rails using dual-loop isolation; I²C enables centralized fault logging. Use Value: Per-loop OVP/UVP/OCP and VRHOT# allow independent fault containment; MTP stores unique calibration per GPU, eliminating trim resistors. |
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 |
|---|---|---|---|
| CHL8213-03CRT | Same 4+1-phase architecture but lacks VRHOT# pin and thermistor interface; no thermal flag output | Not suitable for systems requiring hardware-coordinated GPU thermal throttling | Select when thermal telemetry is handled externally or not required |
| ISL6377IRZ-T | Analog multi-phase controller with 3+1-phase config; no I²C, no MTP, no VRHOT#; relies on external DAC for VID | Limited to fixed-voltage or coarse VID steps; no real-time telemetry or OTA updates | Select only for cost-sensitive legacy designs lacking digital configurability needs |
Compared with CHL8213-03CRT, CHL8214-03CRT adds VRHOT# for direct thermal coordination; versus ISL6377IRZ-T, it delivers full digital configurability, ATA-driven capacitor reduction, and integrated thermal signaling-critical for modern GPU power delivery.
Availability
CHL8214-03CRT is available at Aetrix Electronics and suitable for GPU voltage regulation, GDDR memory power, overclocking platforms, and multi-GPU server VRMs requiring stable component supply, long-term lifecycle support, and consistent MTP programming across production batches.
Supply support for CHL8214-03CRT 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 global semiconductor leader specializing in power management, automotive, and industrial control ICs, with deep expertise in digital power conversion and energy-efficient solutions.
The CHL82xx family targets high-performance GPU voltage regulation, combining digital control precision, thermal intelligence, and footprint compatibility to accelerate VRD design for discrete graphics and AI accelerator platforms.
FAQ
What is the function of the VRHOT# pin on CHL8214-03CRT?
The VRHOT# pin is an open-drain, active-low thermal alert output asserted when the internal thermistor-sensed temperature exceeds a user-configurable threshold. It interfaces directly with GPU thermal management logic to trigger hardware-level throttling or shutdown, ensuring safe operation under sustained high-power loads without software intervention.
Does CHL8214-03CRT require external EEPROM for configuration storage?
No. CHL8214-03CRT includes on-chip Multiple Time Programmable (MTP) memory that retains all configuration settings-including loop parameters, protection thresholds, VID mappings, and ATA coefficients-across power cycles. This eliminates the need for external NVM and reduces system BOM count and board area.
Can CHL8214-03CRT operate with only the 3-bit VIDSEL interface, without I²C?
Yes. The 3-bit VIDSEL0–VIDSEL2 interface supports fast, parallel voltage selection for up to eight preprogrammed VID codes stored in MTP. I²C is optional and used only for advanced configuration, telemetry, or runtime updates; basic operation is fully functional without I²C connection.
How does IR Adaptive Transient Algorithm (ATA) reduce output capacitance?
ATA uses proprietary non-linear digital PWM to dynamically adjust duty cycle and phase count within microseconds of load transients. By predicting and preempting voltage droop/surge, it maintains tighter regulation-enabling >40% reduction in required bulk capacitance versus conventional fixed-frequency controllers while meeting GPU VRD spec ripple limits.
CHL8214-03CRT 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:
- 4
- 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-40-903
CHL8214-03CRT FAQ
1.How can I place an order for CHL8214-03CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8214-03CRT 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 CHL8214-03CRT reliable?
The price and inventory of CHL8214-03CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8214-03CRT is usually 5 days.
3.What payment methods are accepted for CHL8214-03CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8214-03CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8214-03CRT?
CHL8214-03CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8214-03CRT 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 CHL8214-03CRT?
For technical support, including CHL8214-03CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8214-03CRT requirements.
6.How does Aetrix verify that CHL8214-03CRT is sourced from the original manufacturer or authorized distributors?
All CHL8214-03CRT 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 CHL8214-03CRT meets industry standards.
7.What is the process for return or replacement of CHL8214-03CRT?
All CHL8214-03CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8214-03CRT, 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 CHL8214-03CRT part is unused and in its original packaging.
Return procedure for CHL8214-03CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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