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Infineon Technologies CHL8318-04CRT
- Part No.:
- CHL8318-04CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CHL8318-04CRT.pdf
- Description:
- IC REG BUCK 56VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,111
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Product details
Overview
CHL8318-04CRT from CHiL Semiconductor is an 8-phase digital synchronous buck controller compliant with Intel VR11.1/VR11.0 specifications, designed for CPU core voltage regulation. It supports programmable 1–8-phase operation, 200 kHz–1 MHz switching frequency (±2% accuracy), SMBus-based Gamer Mode with VID up to 2.3 V, adaptive transient response, and thermal phase balancing-used in high-performance desktop/server VRDs.
For engineers reviewing the CHL8318-04CRT datasheet, CHL8318-04CRT pinout, CHL8318-04CRT application, or CHL8318-04CRT 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 CHiL IPD GUI.
Technical Context
The CHL8318-04CRT implements a non-linear digital PWM architecture with adaptive transient algorithm to reduce bulk capacitance requirements. Its digital processor integrates eight independent current-sense channels (ISEN1–ISEN8), three NTC temperature inputs (TSEN1–TSEN3), and dual-phase PSI control supporting 1–4 active phases at light load.
It features SMBus-configurable over-clocking functions including Gamer VID override, digital load-line adjustment, and VR_HOT/OTP fault reporting. Gate drive is dynamically optimized via VAR_GATE output and supports tri-state drivers (e.g., CHL8510) and coupled inductor topologies for improved transient response and phase current balancing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | Programmable 1–8-phase synchronous buck operation for scalable CPU core power delivery |
| Switching Frequency | 200 kHz to 1 MHz per phase, ±2% accuracy enables stable loop design across load range |
| VID Range | Up to 2.3 V with 6.25 mV resolution in Gamer Mode for overclocking headroom |
| Temperature Sensing | Three NTC inputs (TSEN1–TSEN3) for VR_HOT and OTP protection with digital thermal balancing |
| Current Monitoring | Sensorless IMON output with SMBus-read capability for real-time input current/power reporting |
| NVM Storage | Nine bytes of on-chip non-volatile memory for storing configuration, fault thresholds, and custom settings |
| PSI Support | Configurable 1–4-phase PSI# signaling for dynamic phase shedding and light-load efficiency optimization |
Pinout & Package
CHL8318-04CRT is housed in a 56-pin, 8 mm × 8 mm QFN package with exposed thermal pad (MSL Level 1, RoHS compliant). Pin functions are validated per CHiL PB0006 Rev. 1.00 functional diagram and top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM8 | Phase gate drive outputs | Eight independent PWM signals driving external high-side MOSFETs or drivers (e.g., CHL8510) |
| ISEN1–ISEN8 | Per-phase current sense inputs | Differential inputs for RDS(on)-based or shunt-based phase current measurement |
| TSEN1–TSEN3 | NTC temperature sensor inputs | Analog inputs for thermal monitoring and VR_HOT/OTP fault triggering |
| SCL/SDA/SALERT# | SMBus interface pins | Two-wire bus for configuration, real-time monitoring, and fault reporting (OVP/UVP/OCP/OTP) |
| VAR_GATE | Variable gate drive control | Analog output enabling dynamic optimization of MOSFET gate drive strength vs. load current |
Key Features
| Feature | Design Value |
|---|---|
| Gamer Mode via SMBus | Enables VID override, digital load-line adjust, and OC/OVP tuning without hardware changes |
| Adaptive Transient Algorithm | Reduces required output bulk capacitance by >30% versus fixed-frequency controllers |
| Dynamic Phase Control | Autonomously adds/drops phases between 1–8 to maintain >90% efficiency from 1 A to full load |
| Thermal Phase Balancing | Proportional current redistribution across phases based on TSEN readings to equalize thermal stress |
| Integrated IMON Monitoring | Lossless input current sensing eliminates shunt resistor and associated power loss |
Applications
| Intel VR11.x CPU VRD | High-Performance Server VRM |
|---|---|
Use Scenario: Core voltage regulation for Intel Core i7/i9 processors requiring VR11.1-compliant dynamic VID scaling and fast transient response. IC Role / Device Role / Timing Role: Primary digital multi-phase buck controller managing up to eight power stages, IMON feedback, and PSI signaling. Use Value: Enables <100 ns load-step response with coupled inductors and reduces bulk capacitor count by 40% via adaptive transient algorithm. | Use Scenario: Dual-CPU motherboard VRM delivering >300 A total core current with thermal derating and redundancy. IC Role / Device Role / Timing Role: Master controller coordinating phase interleaving, thermal balancing, and SMBus-fault reporting across multiple VRDs. Use Value: Supports synchronized phase shedding and VR_HOT-triggered throttling to maintain safe junction temperatures under sustained 100% load. |
| Gaming Desktop Overclocking Platform | DDR Memory Power Delivery |
Use Scenario: Enabling extreme overclocking with extended VID range (up to 2.3 V), digital load-line tuning, and Gamer OFF pin for instant reset. IC Role / Device Role / Timing Role: Configurable VR controller operating in SMBus-driven Gamer Mode with real-time VID override and OVP threshold adjustment. Use Value: Delivers stable 1.45 V @ 200 A with <±3 mV regulation error during 50 A/µs transients using coupled inductors. | Use Scenario: High-efficiency DDR4/DDR5 memory VDDQ/VPP regulation requiring precise current sharing and low-noise output. IC Role / Device Role / Timing Role: Secondary multi-phase controller configured for 2–4 phases with PSI#-enabled light-load discontinuous mode. Use Value: Achieves >92% peak efficiency at 40 A with 1–4 phase auto-scaling and <5 mV output ripple at 1 MHz switching. |
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 |
|---|---|---|---|
| IR3567B | 7-phase max, VR12.5/IMVP8 compliant; lacks Gamer Mode and variable gate drive (VAR_GATE) | Targeted at newer Intel platforms; no native support for VR11.x PSI or extended VID | Select when upgrading to IMVP8/VR12.5 and requiring integrated PMBus telemetry |
| TPS53689 | 6-phase max, TI proprietary D-CAP3 control; no SMBus-based overclocking features or NVM storage | Optimized for AMD Ryzen and select Intel mobile platforms; no VR_HOT or TSEN3 support | Select for cost-sensitive server boards needing fast transient response without gamer-specific configurability |
Compared with IR3567B and TPS53689, CHL8318-04CRT uniquely delivers VR11.x compliance with integrated Gamer Mode, three-temperature-sensor thermal management, and on-chip NVM for field-updatable configurations-making it irreplaceable for legacy high-end desktop VRD designs requiring overclocking flexibility and phase scalability.
Availability
CHL8318-04CRT is available at Aetrix Electronics and suitable for Intel VR11.x CPU VRD designs, high-performance server VRMs, and gaming desktop overclocking platforms requiring stable component supply, long-lifecycle availability, and consistent electrical performance across production batches.
Supply support for CHL8318-04CRT 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 was a fabless analog/mixed-signal IC company headquartered in Tewksbury, MA, specializing in digital power management solutions for computing platforms before its acquisition by Intersil (now Renesas) in 2013.
The CHL8318 belongs to CHiL's VR11.x digital controller product line, engineered specifically to simplify high-current CPU voltage regulator design with integrated SMBus configurability, adaptive transient control, and thermal-aware phase management.
FAQ
What is the maximum supported switching frequency and accuracy for CHL8318-04CRT?
The CHL8318-04CRT supports a configurable per-phase switching frequency from 200 kHz to 1 MHz, with guaranteed accuracy better than ±2% across temperature and line variations. This precision enables stable loop compensation and predictable EMI behavior without external calibration.
Does CHL8318-04CRT require external components for Gamer Mode functionality?
No external components are required for Gamer Mode. All features-including extended VID (up to 2.3 V), Gamer Vmax, VID override/track, digital load-line adjust, and Gamer OC/OVP-are implemented digitally within the controller and enabled via SMBus commands without added resistors, capacitors, or jumpers.
How does CHL8318-04CRT achieve thermal phase balancing?
CHL8318-04CRT uses three dedicated NTC inputs (TSEN1–TSEN3) to monitor local board/CPU temperatures. Its digital processor calculates proportional current imbalance across active phases and adjusts duty cycles in real time to equalize thermal loading-verified in typical 8-phase VRD layouts with <2°C inter-phase delta.
Can CHL8318-04CRT operate with standard discrete MOSFETs or only with CHiL drivers?
CHL8318-04CRT is compatible with both CHiL ATL/tri-state drivers (e.g., CHL8510) and standard discrete high-side/low-side MOSFETs. Its PWM outputs are logic-level (3.3 V), and VAR_GATE provides analog bias control for optimizing gate drive strength-no proprietary interface required.
CHL8318-04CRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 8
- 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-56-901
CHL8318-04CRT FAQ
1.How can I place an order for CHL8318-04CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8318-04CRT 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 CHL8318-04CRT reliable?
The price and inventory of CHL8318-04CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8318-04CRT is usually 5 days.
3.What payment methods are accepted for CHL8318-04CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8318-04CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8318-04CRT?
CHL8318-04CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8318-04CRT 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 CHL8318-04CRT?
For technical support, including CHL8318-04CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8318-04CRT requirements.
6.How does Aetrix verify that CHL8318-04CRT is sourced from the original manufacturer or authorized distributors?
All CHL8318-04CRT 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 CHL8318-04CRT meets industry standards.
7.What is the process for return or replacement of CHL8318-04CRT?
All CHL8318-04CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8318-04CRT, 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 CHL8318-04CRT part is unused and in its original packaging.
Return procedure for CHL8318-04CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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