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Infineon Technologies CHL8112A-09CRT
- Part No.:
- CHL8112A-09CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8112A-09CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
CHL8112A-09CRT from CHiL Semiconductor is a dual-loop, 5-phase digital multi-phase buck controller supporting AMD® SVI/G34 and Memory MPoL modes, with programmable switching frequency (200 kHz–1.2 MHz), Variable Gate Drive, and CHiL Adaptive Transient Algorithm (ATA); used in high-performance CPU VRMs for AMD platforms requiring Vtt tracking and overclocking support.
For engineers reviewing the CHL8112A-09CRT datasheet, CHL8112A-09CRT pinout, CHL8112A-09CRT application, or CHL8112A-09CRT equivalent, key selection considerations include dual-loop OCP, SMBus/PMBus telemetry interface, NVM-based configuration storage, 6×6 QFN-40 package compatibility, and real-time phase control for transient response optimization.
Technical Context
The CHL8112A-09CRT implements two independent digital PWM control loops with per-loop OVP/UVP/OCP/OTP/CFP protection and thermistor-based temperature sensing. It supports AMD SVI-compliant command interface and DDR memory Vtt tracking via dedicated loop 2 functionality.
Its digital architecture enables CHiL Efficiency Shaping features: Variable Gate Drive adjusts MOSFET gate voltage dynamically with load current, while Dynamic Phase Control adds/drops phases in 1- or 2-phase configurations-including active diode emulation at very light loads-to maintain efficiency across full load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-loop digital multi-phase buck controller with up to 5 total phases |
| Switching Frequency | 200 kHz to 1.2 MHz per phase; configurable per loop for optimal EMI/efficiency trade-off |
| Interface | I²C/SMBus/PMBus v1.1 compliant; supports telemetry of voltage, current, temperature, and power for both loops |
| Protection Features | Per-loop OVP, UVP, OCP, OTP, CFP; VR_HOT# fault signaling with thermistor input |
| Configuration Storage | On-chip non-volatile memory (NVM) stores custom settings, eliminating external EEPROM and reducing BOM count |
| Operating Temp | 0°C to +85°C ambient; specified for commercial server and desktop VRM applications |
| Supply Voltage | +3.3V only; eliminates need for auxiliary bias rails in system design |
Pinout & Package
CHL8112A-09CRT is housed in a Pb-free, RoHS-compliant 6 mm × 6 mm, 40-pin QFN package with exposed thermal pad (EP). Pin functions are mode-dependent (AMD vs. MPoL), and pin 1 is marked by dot; top-side marking includes "CHL8112A" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM5 | Phase gate drive outputs | Five independent high-speed PWM outputs driving external high-side MOSFETs; timing synchronized across phases |
| ISEN1–ISEN5 | Current sense inputs | Individual phase current sensing via low-side shunt resistors; enables per-phase OCP and dynamic phase control |
| VSEN / VSEN_L2 | Output voltage feedback | Dual-loop remote-sense inputs for precise regulation of CPU core (Loop 1) and DDR Vtt (Loop 2) |
| SMB_CLK / SMB_DIO / SMB_ALERT# | PMBus interface signals | Standard SMBus physical layer interface enabling real-time telemetry and configuration updates without host reboot |
| VAR_GATE_PM_ADDR | Mode-select pin | Selects between Variable Gate Drive operation (high) or PMBus address assignment (low); unique to CHL8112A variant |
Key Features
| Feature | Design Value |
|---|---|
| CHiL Adaptive Transient Algorithm (ATA) | Proprietary non-linear digital PWM reduces required bulk capacitance by >30% versus fixed-frequency controllers |
| Dynamic Phase Control | Automatically scales active phase count (1–5) based on real-time load, improving light-load efficiency by up to 15% |
| Variable Gate Drive (CHL8112A only) | Adjusts gate drive voltage (3.3V–7.5V) dynamically to minimize MOSFET switching losses across load range |
| Auto-Phase Detection & Compensation | Self-calibrates phase timing and current balance during startup, eliminating manual tuning of coupling inductors |
| NVM-Based Configuration | Stores complete VRM setup-including OCP thresholds, frequency, and loop compensation-enabling one-time programming and field reconfiguration |
Applications
| AMD CPU VRM | DDR Memory Vtt Tracking |
|---|---|
Use Scenario: High-end desktop and workstation motherboards using AMD Socket G34 or AM3+ CPUs with aggressive transient demands. IC Role / Device Role / Timing Role: Dual-loop controller managing CPU core (VDD) and I/O (VDDIO) rails with independent transient response and protection. Use Value: ATA algorithm reduces output capacitor count by ≥40%, lowering board area and cost while meeting VRD12.0 ripple specs. | Use Scenario: DDR3/DDR4 memory subsystems requiring tightly regulated Vtt rail tracked to VDDQ/2. IC Role / Device Role / Timing Role: Loop 2 operates as precision-tracking buck regulator synchronized to main CPU loop for dynamic Vtt adjustment. Use Value: Eliminates discrete tracking circuitry and improves Vtt accuracy to ±1% over temperature, supporting JEDEC DDR timing margins. |
| Gaming Platform Overclocking | Server SMBus Telemetry |
Use Scenario: Enthusiast gaming motherboards enabling user-configurable Vmax, phase count, and transient aggressiveness. IC Role / Device Role / Timing Role: Configurable "Overclocking & Gaming Mode" with adjustable voltage ceiling and enhanced phase-dropping logic for burst workloads. Use Value: Enables stable 1.5V+ CPU operation under sustained AVX loads while maintaining <10 mV droop via fast-loop ATA response. | Use Scenario: 1U/2U rack servers requiring real-time VR health monitoring and predictive failure alerts. IC Role / Device Role / Timing Role: SMBus interface reports per-loop current, temperature, and fault status to BMC; SMB_ALERT# asserts on critical faults. Use Value: Enables platform-level power management and thermal throttling decisions without OS involvement, improving datacenter uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop digital multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3567B | Single-die dual-loop controller with integrated MOSFET drivers; no NVM; requires external EEPROM for configuration | Lacks Variable Gate Drive and auto-phase detection; supports Intel VR12.5/VR13 but not AMD SVI natively | Prefer for Intel-centric designs where driver integration reduces component count, but requires additional firmware effort for AMD compatibility |
| TPS53689 | TI dual-loop controller with D-CAP3 modulation; no PMBus telemetry; analog-based transient response | Supports AMD SVI2 but lacks MPoL mode and Vtt tracking; limited to 4-phase max per loop | Choose when analog control simplicity and lower cost outweigh need for digital configurability and DDR memory tracking capability |
Compared with IR3567B and TPS53689, the CHL8112A-09CRT uniquely combines AMD SVI/MPoL compliance, on-chip NVM, Variable Gate Drive, and Vtt tracking in a single 40-pin QFN-making it the only solution enabling full-featured, drop-in VRM implementation for AMD G34 and high-end AM4 platforms without external configuration components.
Availability
CHL8112A-09CRT is available at Aetrix Electronics and suitable for AMD CPU VRMs, DDR memory subsystems, overclocked gaming motherboards, and server power management systems requiring stable component supply, long-term lifecycle support, and validated digital multiphase control.
Supply support for CHL8112A-09CRT 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 Corp., headquartered in Tewksbury, MA, is a fabless IC design company specializing in digitally controlled power management solutions for high-performance computing platforms.
The CHL8112A product line was developed specifically to meet AMD's SVI interface requirements and deliver scalable, efficient, and highly configurable VRMs for next-generation CPU and memory power delivery-emphasizing reduced component count, simplified layout, and software-defined power policy.
FAQ
What configuration file does CHL8112A-09CRT ship with?
The "-09" suffix indicates this part is pre-programmed with configuration file 09, which enables default AMD SVI mode, 5-phase operation, 600 kHz switching frequency, and Vtt tracking on Loop 2. It boots immediately without requiring IPD GUI programming, unlike unprogrammed "-00" variants.
Does CHL8112A-09CRT support coupled inductors?
Yes-it includes dedicated coupled inductor mode where phases are added/dropped in pairs, improving transient response symmetry and reducing magnetic footprint. This mode is enabled via NVM bit setting and requires compatible coupled inductor layout with interleaved winding architecture.
Can CHL8112A-09CRT be used in Intel platforms?
No-it is designed exclusively for AMD SVI/G34 and MPoL protocols. While some register-level functions may appear similar, its command set, timing, and loop coordination logic are incompatible with Intel VR12/VR13 SVID, and it lacks required Intel-specific features like PS4 entry support.
Is VAR_GATE_PM_ADDR pin functional on CHL8112A-09CRT?
Yes-this pin is active and configured per NVM setting: pulled high by default to enable Variable Gate Drive mode. If PMBus address assignment is needed instead, the pin must be externally pulled low and corresponding NVM bit updated using CHiL Intuitive Power Designer (IPD) GUI.
CHL8112A-09CRT 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:
- 5
- 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:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-40-902
CHL8112A-09CRT FAQ
1.How can I place an order for CHL8112A-09CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8112A-09CRT 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 CHL8112A-09CRT reliable?
The price and inventory of CHL8112A-09CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8112A-09CRT is usually 5 days.
3.What payment methods are accepted for CHL8112A-09CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8112A-09CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8112A-09CRT?
CHL8112A-09CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8112A-09CRT 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 CHL8112A-09CRT?
For technical support, including CHL8112A-09CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8112A-09CRT requirements.
6.How does Aetrix verify that CHL8112A-09CRT is sourced from the original manufacturer or authorized distributors?
All CHL8112A-09CRT 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 CHL8112A-09CRT meets industry standards.
7.What is the process for return or replacement of CHL8112A-09CRT?
All CHL8112A-09CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8112A-09CRT, 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 CHL8112A-09CRT part is unused and in its original packaging.
Return procedure for CHL8112A-09CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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