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Infineon Technologies CHL8112A-11CRT
- Part No.:
- CHL8112A-11CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8112A-11CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,314
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Product details
Overview
CHL8112A-11CRT from CHiL Semiconductor is a dual-loop, 5-phase digital multi-phase buck controller supporting AMD® SVI/G34 and MPoL memory power modes, with programmable switching frequency (200kHz–1.2MHz), Variable Gate Drive, and CHiL Adaptive Transient Algorithm (ATA) for CPU core and DDR memory VR applications.
For engineers reviewing the CHL8112A-11CRT datasheet, CHL8112A-11CRT pinout, CHL8112A-11CRT application in AMD server/desktop VRD designs, or CHL8112A-11CRT equivalent for SVI-compliant multi-phase buck control, this page delivers verified functional identity, validated pin roles, confirmed package mapping, and real-world design context without inference.
Technical Context
The CHL8112A-11CRT implements two independent digital PWM control loops with per-loop OVP/UVP/OCP/OTP/CFP protection and SMBus/PMBus telemetry for voltage, current, temperature, and power. It supports auto-phase detection with real-time compensation and coupled inductor operation with phase-pairing logic.
Its CHiL Efficiency Shaping Technology includes Dynamic Phase Control (1–5 active phases), Active Diode Emulation at light loads, and Vmax-based overclocking mode. The device uses on-chip NVM to store custom configurations and requires external CHL8510 gate drivers for high-side/low-side MOSFET drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Phases | Up to 5 total phases, flexibly assignable across Loop 1 and Loop 2 |
| Switching Frequency | 200kHz to 1.2MHz per phase; enables optimized efficiency vs. EMI trade-off |
| Control Interface | I²C/SMBus/PMBus; supports telemetry and configuration of both loops up to 16 devices |
| Operating Temp | 0°C to +85°C ambient; suitable for commercial desktop/server VRD environments |
| Supply Voltage | +3.3V only; eliminates need for auxiliary bias rails |
| Package | 6×6 mm, 40-pin QFN; RoHS-compliant, Pb-free, thermal pad exposed |
| Memory | On-chip non-volatile memory (NVM); stores custom configuration, eliminating external EEPROM |
Pinout & Package
CHL8112A-11CRT is housed in a 6×6 mm, 40-pin QFN package with exposed thermal pad. Pin functions are defined per AMD SVI or MPoL mode; pin numbering follows standard top-view layout with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM5 | Phase PWM outputs | Drive external gate drivers (e.g., CHL8510); support phase shedding and pairing |
| ISEN1–ISEN5 | Per-phase current sense inputs | Enable per-phase OCP and adaptive transient response via CHiL ATA |
| VSEN / VSEN_L2 | Main and secondary loop voltage sense | Provide feedback for dual-loop regulation; support Vtt tracking for DDR memory |
| SMB_CLK / SMB_DIO / SMB_ALERT# | PMBus interface signals | Enable bidirectional telemetry, fault reporting, and remote configuration |
| VAR_GATE_PM_ADDR | Mode select / address pin | Configures Variable Gate Drive (CHL8112A) or sets PMBus address in multi-device systems |
Key Features
| Feature | Design Value |
|---|---|
| Dual-loop adaptive transient algorithm (ATA) | Reduces required bulk capacitance by >30% vs. fixed-gain analog controllers |
| Dynamic Phase Control | Automatically scales active phases (1–5) based on real-time load current to maintain peak efficiency |
| Variable Gate Drive (CHL8112A) | Adjusts gate drive voltage dynamically to minimize MOSFET switching losses across load range |
| Active Diode Emulation | Enables synchronous rectifier emulation at very light loads, improving light-load efficiency |
| NVM-based configuration storage | Eliminates external configuration EEPROM and reduces BOM count and board space |
Applications
| AMD Desktop CPU VRD | Server Memory Regulator |
|---|---|
Use Scenario: High-performance desktop platform with AMD Phenom II or FX-series CPU requiring dynamic voltage scaling and fast transient response. IC Role / Device Role / Timing Role: Dual-loop digital buck controller managing CPU core (Loop 1) and I/O (Loop 2) power domains with SVI interface compliance. Use Value: Enables precise VDD/VDDIO tracking, reduces output capacitor count via ATA, and supports overclocking via Vmax setting. | Use Scenario: DDR3/DDR4 memory subsystem in 1U/2U rack servers requiring stable Vtt and Vref with thermally aware fault management. IC Role / Device Role / Timing Role: Dual-loop controller delivering Vtt tracking and memory rail regulation with SMBus telemetry for thermal margining. Use Value: Provides per-loop OTP/OCP and VR_HOT# signaling for memory thermal throttling, reducing system-level thermal derating overhead. |
| Gaming Platform VRM | Overclocked Workstation |
Use Scenario: Enthusiast gaming motherboard with manual overclocking controls and real-time power monitoring. IC Role / Device Role / Timing Role: Multi-phase buck controller operating in Overclocking & Gaming Mode with user-configurable Vmax and phase activation thresholds. Use Value: Delivers stable high-current delivery under burst loads while enabling fine-grained voltage tuning via PMBus GUI (IPD). | Use Scenario: Professional workstation running CAD/EDA workloads with sustained multi-core CPU utilization and memory bandwidth demand. IC Role / Device Role / Timing Role: Dual-loop regulator managing CPU core and memory power with coupled inductor support and auto-phase detection. Use Value: Achieves <90% full-load efficiency and <50μs transient recovery using CHiL Dynamic Phase Control and coupled inductor optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop digital multi-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR3567B | Single-die dual-loop controller with integrated MOSFET drivers; no NVM; 3.3V/5V supply support | Lacks Variable Gate Drive and Active Diode Emulation; supports Intel VR12/VR12.5, not AMD SVI | Select when Intel platform compatibility and driver integration outweigh AMD-specific features |
| TPS53679 | TI dual-loop controller with D-CAP3 modulation; no PMBus address pin; supports 3.3V/5V input | No native AMD SVI mode; requires external configuration EEPROM; no Vmax overclocking mode | Select for TI ecosystem designs where D-CAP3 transient response meets requirements and SVI compliance is not needed |
Compared with IR3567B and TPS53679, the CHL8112A-11CRT uniquely delivers AMD SVI/G34 compliance, on-chip NVM, Variable Gate Drive, and Vmax-based overclocking-making it the only choice for configurable, high-efficiency AMD desktop/server VRD implementations requiring minimal external components.
Availability
CHL8112A-11CRT is available at Aetrix Electronics and suitable for AMD desktop VRD, server memory regulation, and overclocked gaming platform designs requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for CHL8112A-11CRT 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, designed high-efficiency digital power controllers for CPU and memory VR applications before its acquisition by ON Semiconductor in 2013.
The CHL8112A product line targets AMD-compliant multi-phase VRD solutions, emphasizing configurability, transient performance, and BOM reduction through integrated algorithms and NVM storage.
FAQ
What is the function of the VAR_GATE_PM_ADDR pin on CHL8112A-11CRT?
The VAR_GATE_PM_ADDR pin serves a dual role: when pulled high or low, it configures Variable Gate Drive voltage level (1.2V/1.8V/2.5V) for optimal MOSFET switching loss reduction; when used with pull-up/down resistors, it sets the PMBus address for multi-device SMBus networks, enabling up to 16 controllers on one bus.
Does CHL8112A-11CRT support DDR5 memory regulation?
No. CHL8112A-11CRT was designed for DDR3/DDR4 Vtt tracking and MPoL memory power modes specified in AMD G34 and SVI2 protocols. It lacks DDR5-specific timing, voltage accuracy, and command protocol support defined in JEDEC DDR5 standards and AMD's later SVI3 specification.
Can CHL8112A-11CRT operate without programming its NVM?
No. Unprogrammed CHL8112A-11CRT parts will not initialize or generate PWM outputs until configured via CHiL Intuitive Power Designer (IPD) GUI and written to on-chip NVM. Default configuration file "00" must be loaded first to enable safe startup with factory-tested parameters.
Which external gate drivers are recommended for use with CHL8112A-11CRT?
CHiL specifies the CHL8510 family of 3.3V-compatible dual-channel gate drivers for use with CHL8112A-11CRT. These drivers support high-side bootstrapping, provide matched propagation delay (<20ns), and interface directly with PWM1–PWM5 outputs and IRTN/RCSP sensing nodes for accurate current-mode control.
CHL8112A-11CRT 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-11CRT FAQ
1.How can I place an order for CHL8112A-11CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8112A-11CRT 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-11CRT reliable?
The price and inventory of CHL8112A-11CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8112A-11CRT is usually 5 days.
3.What payment methods are accepted for CHL8112A-11CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8112A-11CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8112A-11CRT?
CHL8112A-11CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8112A-11CRT 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-11CRT?
For technical support, including CHL8112A-11CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8112A-11CRT requirements.
6.How does Aetrix verify that CHL8112A-11CRT is sourced from the original manufacturer or authorized distributors?
All CHL8112A-11CRT 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-11CRT meets industry standards.
7.What is the process for return or replacement of CHL8112A-11CRT?
All CHL8112A-11CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8112A-11CRT, 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-11CRT part is unused and in its original packaging.
Return procedure for CHL8112A-11CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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