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Infineon Technologies CHL8326-06CRT
- Part No.:
- CHL8326-06CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CHL8326-06CRT.pdf
- Description:
- IC REG BUCK 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
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Product details
Overview
CHL8326-06CRT from Infineon Technologies is a dual-loop digital multi-phase buck controller supporting up to 6 phases per loop, compliant with Intel® VR12 and AMD® SVI/PVI specifications, operating at 200kHz–1.2MHz switching frequency, featuring IR Adaptive Transient Algorithm (ATA), I²C/SMBus/PMBus telemetry, and non-volatile memory for custom configuration - used in high-performance CPU voltage regulation on overclocked gaming motherboards.
For engineers reviewing the CHL8326-06CRT datasheet, CHL8326-06CRT pinout, CHL8326-06CRT application, or CHL8326-06CRT equivalent, key selection criteria include dual-loop phase assignment flexibility, per-loop OVP/UVP/OCP/OTP/CFP fault protection, VR_HOT#1 signaling, active diode emulation at light load, and compatibility with 3.3V tri-state drivers.
Technical Context
The CHL8326-06CRT implements two independent digital PWM control loops with programmable phase allocation (up to 6 total phases), supporting Intel VR12 (MPoL) and AMD SVI/PVI protocols via dedicated VID[0]–VID[5] and SV_CLK/SV_DIO pins. Each loop includes real-time current sensing (ISEN1–ISEN6, IRTN1–IRTN6), voltage monitoring (VSEN, VRTN, VSEN_L2, VRTN_L2), and thermistor-based temperature sensing (TSEN).
It integrates IR Efficiency Shaping Technology: Variable Gate Drive adjusts MOSFET gate voltage dynamically based on load current, while Dynamic Phase Control enables automatic phase shedding (1- or 2-phase mode) and active diode emulation under very light loads. ATA minimizes bulk capacitance by applying non-linear digital PWM during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-loop digital multi-phase synchronous buck controller |
| Max Phases | 6 total phases, flexibly assignable between Loop 1 and Loop 2 |
| Switching Frequency | 200 kHz to 1.2 MHz per phase - enables optimization of efficiency vs. size trade-off |
| Interface Protocol | I²C/SMBus/PMBus - supports telemetry of voltage, current, temperature, and power per loop |
| Fault Protection | Per-loop OVP, UVP, OCP, OTP, CFP - ensures robust system-level rail integrity |
| Memory | On-chip NVM - stores custom configuration without external EEPROM |
| Operating Temp | −20°C to +85°C ambient - suitable for commercial-grade motherboard VRMs |
Pinout & Package
CHL8326-06CRT uses a 7×7 mm, 48-pin QFN package (MSL2), with exposed thermal pad. Pin functions are validated per Figure 1 and functional block diagram in datasheet Rev. V1.09.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM6 | Phase gate drive outputs | Drive external high-side MOSFETs; support interleaved timing and phase shedding |
| ISEN1–ISEN6 | Current sense inputs | Connect to low-side RDS(on) or discrete sense resistors for per-phase current measurement |
| VSEN / VSEN_L2 | Output voltage feedback | High-impedance analog inputs for closed-loop voltage regulation on each loop |
| SMB_CLK / SMB_DIO | PMBus interface clock/data | Enable bidirectional telemetry and configuration over standard system management bus |
| VR_READY1 / VR_READY_L21 | Power-good status outputs | Open-drain signals indicating stable output regulation on Loop 1 and Loop 2 |
Key Features
| Feature | Design Value |
|---|---|
| IR Adaptive Transient Algorithm (ATA) | Reduces required bulk capacitance by >30% via non-linear digital PWM response to load steps |
| Dynamic Phase Control | Automatically scales active phases from 6 → 2 → 1 based on real-time load, improving light-load efficiency |
| Active Diode Emulation | Replaces synchronous rectifier conduction with controlled high-side FET turn-on to reduce reverse recovery losses |
| Per-loop VR_HOT# and CFP | Independent thermal and current-fault protection per loop prevents cascading failure in dual-rail systems |
| SVI/PVI and VR12 Compliance | Native support for AMD's serial voltage identification and Intel's MPoL protocol eliminates need for translation logic |
Applications
| CPU Core Voltage Regulation | DDR Memory Vtt Tracking |
|---|---|
Use Scenario: Regulating core voltage for high-end desktop CPUs (e.g., Intel Core i7/i9, AMD Ryzen 7/9) under dynamic workloads including gaming and rendering. IC Role / Device Role / Timing Role: Dual-loop controller managing primary Vcore (Loop 1) and integrated GPU/VCCIO (Loop 2) with independent phase scheduling and transient response. Use Value: ATA reduces bulk capacitor count by ≥30%, lowering BOM cost and PCB area while maintaining <±1% regulation during 50A/μs load steps. | Use Scenario: Generating and tracking DDR4/DDR5 Vtt supply synchronized to memory VDDQ, meeting JEDEC ±15mV tolerance. IC Role / Device Role / Timing Role: Loop 2 configured in Vtt-tracking mode using VSEN_L2 and VRTN_L2 to mirror half of VDDQ rail voltage. Use Value: Eliminates need for separate Vtt regulator IC and precision resistor dividers, reducing component count and layout complexity. |
| Overclocked Gaming Platforms | Server CPU Power Delivery |
Use Scenario: Enabling stable overclocking on enthusiast motherboards with user-adjustable Vmax limits and real-time telemetry. IC Role / Device Role / Timing Role: Configured in "Gaming Mode" with extended VID range and enhanced phase droop control to sustain elevated voltages under sustained all-core loads. Use Value: Programmable Vmax setting and per-phase current limiting prevent thermal runaway during manual overclocking sessions. | Use Scenario: Delivering tightly regulated, fault-resilient power to dual-socket Xeon or EPYC processors in 1U servers. IC Role / Device Role / Timing Role: Deployed in redundant VRM designs where Loop 1 powers CPU socket 1 and Loop 2 powers socket 2, each with independent fault reporting. Use Value: Per-loop CFP and OTP detection enable early fault isolation, preventing single-point failures from affecting both sockets. |
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 |
|---|---|---|---|
| IR3536MTRPBF | Same silicon die, default factory configuration (no customer NVM programming); identical pinout and electrical specs | Lacks pre-loaded custom configuration; requires DPDC GUI setup post-solder | Select when design team prefers full control over register initialization and avoids pre-programmed NVM dependencies |
| CHL8328-00CRT | 8-phase variant (vs. 6-phase), same package footprint but 56-pin QFN; adds PWM7/PWM8, ISEN7/ISEN8, TSEN2 | Supports higher-current CPU platforms requiring >6 phases; not pin-compatible due to extra pins and larger footprint | Select for next-gen platforms needing scalable phase count without changing controller architecture or firmware stack |
Compared with IR3536MTRPBF, CHL8326-06CRT offers factory-programmed NVM for faster time-to-market; compared with CHL8328-00CRT, it provides optimal phase count and pin count for mainstream high-end desktop VRMs without over-provisioning.
Availability
CHL8326-06CRT is available at Aetrix Electronics and suitable for CPU voltage regulation, DDR memory Vtt tracking, overclocked gaming platforms, and server CPU power delivery requiring stable component supply and long-term lifecycle support.
Supply support for CHL8326-06CRT 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 controller innovation since the early 2000s.
The CHL8326 belongs to Infineon's IR35xx digital multiphase controller product line, designed specifically for high-efficiency, high-transient-response CPU and memory VRMs in client and entry-server computing platforms.
FAQ
What is the function of the VAR_GATE pin on CHL8326-06CRT?
VAR_GATE is an analog output that controls the gate drive voltage level for external MOSFET drivers. It dynamically adjusts from 3.3V down to ~1.8V based on real-time load current to minimize switching losses and improve light-load efficiency. Its voltage is set internally by the IR Variable Gate Drive algorithm and is not user-programmable.
Does CHL8326-06CRT support both Intel and AMD processor interfaces simultaneously?
Yes - CHL8326-06CRT natively supports Intel VR12 (MPoL) and AMD SVI/PVI protocols on separate pins: SV_CLK1/SV_DIO1/SV_ALERT1 handle AMD mode, while VID[0]–VID[5] and associated SV_ADDR/PM_ADDR pins configure Intel mode. Mode selection is hardware-configurable via strap pins and does not require firmware reconfiguration.
How is thermal protection implemented on CHL8326-06CRT?
Thermal protection uses an external NTC thermistor connected to the TSEN pin, which feeds into an internal ADC. When temperature exceeds the programmed threshold, VR_HOT#1 asserts low, triggering system-level throttling or shutdown. The signal is loop-specific and latched until cleared via PMBus command or power cycle.
Can CHL8326-06CRT operate with only one active power loop?
Yes - CHL8326-06CRT supports single-loop operation via configuration register settings. Loop 2 can be disabled entirely, allowing all 6 phases to serve Loop 1. In this mode, VSEN_L2, VRTN_L2, and related pins become no-connect, and VR_READY_L21 remains inactive. This is commonly used in cost-optimized single-rail designs.
CHL8326-06CRT 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:
- 6
- Output Phases:
- 6
- 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, Power Good
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-48-901
CHL8326-06CRT FAQ
1.How can I place an order for CHL8326-06CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8326-06CRT 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 CHL8326-06CRT reliable?
The price and inventory of CHL8326-06CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8326-06CRT is usually 5 days.
3.What payment methods are accepted for CHL8326-06CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8326-06CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8326-06CRT?
CHL8326-06CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8326-06CRT 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 CHL8326-06CRT?
For technical support, including CHL8326-06CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8326-06CRT requirements.
6.How does Aetrix verify that CHL8326-06CRT is sourced from the original manufacturer or authorized distributors?
All CHL8326-06CRT 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 CHL8326-06CRT meets industry standards.
7.What is the process for return or replacement of CHL8326-06CRT?
All CHL8326-06CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8326-06CRT, 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 CHL8326-06CRT part is unused and in its original packaging.
Return procedure for CHL8326-06CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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