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Infineon Technologies CHL8314-02CRT
- Part No.:
- CHL8314-02CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CHL8314-02CRT.pdf
- Description:
- IC REG BUCK 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,657
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Product details
Overview
CHL8314-02CRT from Infineon Technologies is a 4-phase digital synchronous buck controller compliant with Intel VR11.1/VR11.0 specifications, supporting programmable 1–4 phase operation, SMBus-based gamer-mode VID extension up to 2.3 V (6.25 mV resolution), adaptive transient response, and thermal phase balancing for CPU core regulation in high-performance desktops and servers.
For engineers reviewing the CHL8314-02CRT datasheet, CHL8314-02CRT pinout, CHL8314-02CRT application, or CHL8314-02CRT equivalent, key selection considerations include VR11.x compliance, digital load-line adjust capability, PSI# support for light-load efficiency, sensorless input current monitoring (IMON), and NVM-configurable fault thresholds via IR Power Designer GUI.
Technical Context
The CHL8314-02CRT implements a digital PWM architecture with real-time adaptive transient algorithm that dynamically adjusts duty cycle and phase count to minimize output capacitance requirements. It integrates VR11.1-compliant Power Status Indicator (PSI#) signaling and supports tri-state gate drivers including IR ATL series.
Its SMBus interface enables full configuration and monitoring-including input current, power, temperature (via TSEN/NTC), and fault status (OVP/UVP/OCP/OTP)-with 9 bytes of on-chip NVM for customer-defined settings. The controller uses sensorless IMON for lossless input current sensing and supports digital thermal balancing across phases using IRTNx and ISENx inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phase Support | Programmable 1–4 phase synchronous buck operation with automatic phase shedding and PSI# activation at light load. |
| VR Compliance | Fully compliant with Intel VR11.1 and VR11.0, including IMON accuracy, PSI#, and dynamic load-line (Droop) specification. |
| Gamer Mode VID Range | Extended VID up to 2.3 V with 6.25 mV resolution via SMBus command; supports Gamer Vmax, VID Override, Track, and OC/OVP controls. |
| Input Voltage Range | +3.3 V supply only; operates over 0°C to +85°C ambient; supports VINSEN for input voltage monitoring. |
| Current Sensing | Sensorless, lossless input current monitoring (IMON); supports external current sense resistors via ISEN1–ISEN4 and IRTN1–IRTN4. |
| Thermal Management | Digital thermal phase balancing; NTC-based temperature reporting via TSEN; VR_HOT and OTP fault triggers with SMBus alert (SALERT#). |
| NVM Storage | 9 bytes of on-chip non-volatile memory for storing custom configuration, fault thresholds, and calibration data. |
Pinout & Package
CHL8314-02CRT 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 official CHL8314 datasheet (V1.06, Oct 2011).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID7 | Digital VID Input | 8-bit parallel interface for VR11.x-compatible voltage identification; sets nominal output voltage. |
| PWM1–PWM4 | Gate Drive Outputs | Four independent PWM outputs driving high-side MOSFETs; support variable gate drive strength via VAR_GATE. |
| ISEN1–ISEN4 | Current Sense Inputs | Differential inputs for external current-sense resistors per phase; used for phase current measurement and balancing. |
| IRTN1–IRTN4 | Current Sense Returns | Low-side return paths for ISENx inputs; enable accurate differential current sensing per phase. |
| SCL / SDA | SMBus Interface | Two-wire serial bus for configuration, real-time monitoring (IMON, temperature, faults), and gamer-mode control. |
| PSI# | Power Status Indicator | Open-drain output signaling light-load condition to enable phase shedding and improve efficiency. |
| TSEN | Temperature Sense Input | Analog input for NTC thermistor; enables VR_HOT warning and OTP shutdown with SMBus-reportable temperature. |
| SALERT# | Fault Alert Output | Open-drain active-low signal asserting on OVP, UVP, OCP, or OTP; supports system-level fault coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Transient Algorithm | Reduces required output capacitance by dynamically optimizing PWM timing and phase activation during load steps. |
| Digital Thermal Phase Balancing | Maintains proportional current distribution across active phases using real-time ISEN/IRTN feedback-no external balancer IC needed. |
| Gamer Mode SMBus Commands | Enables overclocking features (VID override, Vmax, track mode) without hardware modification-fully software-configurable. |
| IR Efficiency Shaping | Combines variable gate drive (VAR_GATE) and programmable PSI modes to maximize efficiency across 1–100% load range. |
| Sensorless IMON | Provides accurate input current measurement without shunt resistor or secondary sensing circuitry-reducing BOM cost and board area. |
Applications
| Intel VR11.x CPU Core Regulation | High-Performance Graphics VRM |
|---|---|
Use Scenario: Regulating core voltage for Intel Core i7/i9 processors in VR11.1-compliant motherboards with dynamic load-line and PSI#-driven phase shedding. IC Role / Device Role / Timing Role: Primary digital PWM controller managing four synchronous buck stages, IMON reporting, and VR_READY handshake with CPU. Use Value: Enables VR11.1 compliance, reduces output capacitor count by 30% via adaptive transient algorithm, and supports precise droop calibration via NVM. | Use Scenario: Power delivery for GPU core voltage on high-end graphics cards requiring stable 1.0–1.3 V at >300 A peak current. IC Role / Device Role / Timing Role: Multi-phase buck controller with thermal phase balancing and gamer-mode VID override for factory-overclocked GPUs. Use Value: Delivers ±1% voltage accuracy under fast load transients and maintains <2°C inter-phase temperature delta via digital current balancing. |
| Overclocking-Enabled Desktop Platform | Server Memory VRM (DDR4/DDR5) |
Use Scenario: Enabling user-adjustable overclocking on enthusiast desktop platforms via BIOS- or software-accessible SMBus commands. IC Role / Device Role / Timing Role: Digital VR controller executing Gamer OC, VID Override, and Track Mode via SDA/SCL; interfaces with GAMER_OFF pin for hardware disable. Use Value: Supports up to 2.3 V output with 6.25 mV granularity and real-time OCP/OVP monitoring-eliminating need for external VID DAC or protection ICs. | Use Scenario: Providing tightly regulated VDDQ/VPP for DDR4/DDR5 memory subsystems in dual-socket servers with multi-rail coordination. IC Role / Device Role / Timing Role: Secondary VR controller synchronized via SMBus to main CPU VR; delivers precise load-line and IMON reporting for memory power telemetry. Use Value: Ensures DDR timing margin integrity through <10 µs transient response and supports system-level power budgeting via SMBus-reported input power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase digital buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6367IRZ | 6-phase capable; lacks gamer-mode VID extension and SALERT#; uses PMBus instead of SMBus. | Targeted at server VRMs with higher phase count; no built-in overclocking feature set. | Choose for 6-phase scalability and PMBus ecosystem compatibility; not suitable for VR11.x gamer-mode systems. |
| TPS53689RTAR | 4-phase, VR12.0/IMVP8 compliant; includes integrated MOSFET drivers; no NVM storage. | Designed for newer Intel platforms; lacks VR11.x-specific PSI# and IMON accuracy specs. | Prefer for IMVP8/VR12.0 designs requiring driver integration; requires external current sensing for IMON. |
Compared with ISL6367IRZ and TPS53689RTAR, CHL8314-02CRT uniquely combines VR11.x compliance, gamer-mode SMBus extensibility, on-chip NVM for field-programmable settings, and sensorless IMON-making it irreplaceable in legacy high-performance desktop and overclocking-focused VRD implementations.
Availability
CHL8314-02CRT is available at Aetrix Electronics and suitable for Intel VR11.x CPU VRD, high-performance graphics card VRM, and overclocking-enabled desktop platform designs requiring stable component supply and long-term lifecycle support.
Supply support for CHL8314-02CRT 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in digital power controllers and silicon carbide solutions.
The CHL8314 belongs to Infineon's digital multiphase controller product line, engineered specifically for Intel VR11.x-compliant CPU and GPU voltage regulation with emphasis on overclocking flexibility, light-load efficiency, and system-level telemetry.
FAQ
What is the function of the VAR_GATE pin on CHL8314-02CRT?
VAR_GATE is an analog input that sets the gate-drive strength for PWM1–PWM4 outputs, enabling dynamic adjustment of MOSFET turn-on speed versus load current. This optimizes switching losses at light loads and conduction losses at heavy loads-key to IR Efficiency Shaping. It accepts a DC voltage from 0.5 V to 2.0 V, mapped linearly to drive strength.
Does CHL8314-02CRT support both VR11.0 and VR11.1 specifications?
Yes, CHL8314-02CRT is fully compliant with both Intel VR11.0 and VR11.1 specifications, including mandatory features such as Power Status Indicator (PSI#), accurate IMON reporting, dynamic load-line (Droop) implementation, and VR11.x-specific SMBus command sets for configuration and monitoring.
How is thermal phase balancing implemented without external components?
CHL8314-02CRT performs digital thermal phase balancing by continuously comparing per-phase current measurements (via ISENx/IRTNx inputs) and adjusting PWM duty cycles in real time to equalize power dissipation. No external balancer IC or analog circuitry is required-the algorithm runs entirely within the controller's digital engine.
Can CHL8314-02CRT be configured without the IR Power Designer GUI?
No-configuration requires Infineon's IR Power Designer GUI, which communicates via SMBus to program NVM registers for VID tables, fault thresholds, PSI behavior, and gamer-mode parameters. While basic operation is possible with default NVM settings, full VR11.x compliance and advanced features depend on GUI-based setup and validation.
CHL8314-02CRT 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:
- 4
- Output Phases:
- 4
- Voltage - Supply (Vcc/Vdd):
- 3.3V
- Frequency - Switching:
- -
- 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
CHL8314-02CRT FAQ
1.How can I place an order for CHL8314-02CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8314-02CRT 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 CHL8314-02CRT reliable?
The price and inventory of CHL8314-02CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8314-02CRT is usually 5 days.
3.What payment methods are accepted for CHL8314-02CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8314-02CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8314-02CRT?
CHL8314-02CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8314-02CRT 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 CHL8314-02CRT?
For technical support, including CHL8314-02CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8314-02CRT requirements.
6.How does Aetrix verify that CHL8314-02CRT is sourced from the original manufacturer or authorized distributors?
All CHL8314-02CRT 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 CHL8314-02CRT meets industry standards.
7.What is the process for return or replacement of CHL8314-02CRT?
All CHL8314-02CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8314-02CRT, 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 CHL8314-02CRT part is unused and in its original packaging.
Return procedure for CHL8314-02CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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