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Infineon Technologies CHL8112A-01CRT
- Part No.:
- CHL8112A-01CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8112A-01CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
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Product details
Overview
CHL8112A-01CRT 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), dual OCP per loop, and Vtt tracking for DDR memory. It operates from +3.3 V supply, features CHiL Adaptive Transient Algorithm (ATA), and is packaged in a 6×6 mm 40-pin QFN.
For engineers reviewing the CHL8112A-01CRT datasheet, CHL8112A-01CRT pinout, CHL8112A-01CRT application in AMD VRD systems, or CHL8112A-01CRT equivalent for SVI-compliant CPU power delivery, this controller delivers configurable phase assignment, real-time gate drive optimization, and PMBus telemetry for voltage, current, temperature, and power across both loops.
Technical Context
The CHL8112A-01CRT implements two independent digital PWM control loops with per-loop OVP/UVP/OCP/OTP/CFP protection and supports AMD SVI protocol on both loops. It enables Vtt tracking for DDR memory and uses coupled inductor mode with auto-phase detection and compensation.
Its CHiL Efficiency Shaping Technology includes Variable Gate Drive (VGD) - dynamically adjusting MOSFET gate voltage based on real-time load current - and Dynamic Phase Control that adds/drops phases in 1- or 2-phase steps. ATA employs proprietary non-linear digital PWM to minimize bulk capacitance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Phases | 5 total, flexibly assignable between Loop 1 and Loop 2 |
| Switching Frequency | 200 kHz to 1.2 MHz per phase; enables optimized efficiency vs. EMI trade-off |
| Control Interface | I²C/SMBus/PMBus; supports telemetry and configuration of both loops |
| Operating Voltage | +3.3 V supply; compatible with standard logic-level system rails |
| Temperature Range | 0°C to +85°C ambient; suitable for commercial server and desktop platforms |
| Package | 6×6 mm, 40-pin QFN; supports high-density VRD layout with thermal pad |
| Non-Volatile Memory | On-chip NVM stores custom configuration; eliminates external EEPROM and reduces BOM count |
Pinout & Package
CHL8112A-01CRT is housed in a 6×6 mm, 40-pin QFN package with exposed thermal pad. Pin functions are mode-dependent (AMD vs. MPoL), and include dual-loop PWM outputs (PWM1–PWM5), current-sense inputs (ISEN1–ISEN5), voltage-sense (VSEN/VSEN_L2), temperature sense (TSEN/TSEN2), SMBus interface (SMB_CLK/SMB_DIO/SMB_ALERT#), and configuration pins (VAR_GATE_PM_ADDR, NC1/SVC2, etc.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM5 | Phase gate drive outputs | Drive external high-side MOSFETs; support coupled inductor operation and phase pairing |
| ISEN1–ISEN5 | Per-phase current sense inputs | Enable accurate per-phase OCP and dynamic phase control via real-time current monitoring |
| VSEN / VSEN_L2 | Main and secondary loop voltage feedback | Provide precision closed-loop regulation for CPU core (Loop 1) and memory/Vtt (Loop 2) |
| TSEN | Primary temperature sense input | Connects to thermistor for VR HOT# assertion and thermal derating |
| SMB_CLK / SMB_DIO / SMB_ALERT# | PMBus interface signals | Enable bidirectional telemetry and fault reporting to system management controller |
| VAR_GATE_PM_ADDR | Mode-select pin (CHL8112A only) | Selects between Variable Gate Drive mode or PMBus address configuration |
Key Features
| Feature | Design Value |
|---|---|
| CHiL Adaptive Transient Algorithm (ATA) | Reduces required output bulk capacitance by up to 40% through non-linear digital PWM response to load transients |
| Dynamic Phase Control | Automatically scales active phases from 1 to 5 based on load current, improving light-load efficiency |
| Variable Gate Drive (CHL8112A) | Adjusts gate drive voltage in real time to match MOSFET Rds(on) and load, reducing switching losses |
| Dual OCP per loop | Independent overcurrent protection for CPU and memory loops, critical for I-spike tolerant AMD CPUs |
| Vtt tracking function | Generates precise DDR memory termination voltage synchronized to VDDQ, minimizing signal integrity risk |
Applications
| AMD CPU Power Delivery | DDR Memory Vtt Regulation |
|---|---|
Use Scenario: High-performance desktop and workstation motherboards targeting AMD Phenom II, FX, and early Ryzen platforms with SVI interface. IC Role / Device Role / Timing Role: Dual-loop digital buck controller managing CPU core (VDD) and SoC I/O (VDDIO) power domains with coordinated transient response. Use Value: ATA and Dynamic Phase Control reduce bulk capacitor count by ≥30%, lowering BOM cost and PCB area while meeting AMD VRD spec ripple limits. | Use Scenario: DDR3/DDR4 memory subsystems requiring precise Vtt tracking relative to VDDQ for signal integrity. IC Role / Device Role / Timing Role: Secondary loop provides tightly regulated, low-noise Vtt derived from main VR output with 0.5% tracking accuracy. Use Value: Eliminates need for separate Vtt regulator IC, simplifying layout and reducing component count without sacrificing JEDEC compliance. |
| Gaming & Overclocking Platforms | Server VR Management |
Use Scenario: Enthusiast motherboards with overclocking BIOS support and user-configurable Vmax limits. IC Role / Device Role / Timing Role: Controller executes Overclocking Mode with programmable Vmax ceiling and enhanced phase shedding for stable high-Vdd operation. Use Value: Enables safe, repeatable overclocking headroom extension while maintaining per-phase current balance and thermal margin. | Use Scenario: 1U/2U rack servers requiring remote telemetry, fault logging, and hot-swap-aware power sequencing. IC Role / Device Role / Timing Role: PMBus interface reports real-time voltage, current, temperature, and power per loop to BMC/IPMI controller. Use Value: SMB_ALERT# pin triggers immediate system-level fault escalation; NVM-stored config ensures consistent behavior after cold boot or reset. |
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 | 6-phase, Intel VR12.5/VR13 compliant; no native AMD SVI support; requires external VID translation | Targeted at Intel Core i7/i9 platforms; lacks Vtt tracking and MPoL mode | Choose for Intel-based designs requiring higher phase count and tighter VR13 transient specs |
| TPS53689 | 6-phase, TI's Fusion Digital Controller; supports both Intel and AMD protocols via firmware; no NVM storage | Requires external EEPROM for configuration; no integrated Vtt tracking circuitry | Prefer when design flexibility across multiple CPU families is needed and external config storage is acceptable |
Compared with IR3567B and TPS53689, CHL8112A-01CRT offers native AMD SVI/G34 and MPoL support, on-chip NVM for configuration persistence, and integrated Vtt tracking - eliminating external components and enabling faster bring-up for AMD-specific platforms.
Availability
CHL8112A-01CRT is available at Aetrix Electronics and suitable for AMD CPU power delivery, DDR memory Vtt regulation, and overclocking platform development requiring stable component supply and long-term lifecycle visibility.
Supply support for CHL8112A-01CRT 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 VRDs before its acquisition by ON Semiconductor in 2013.
The CHL8112A product line targets AMD-based computing platforms, delivering SVI-compliant, dual-loop power control with integrated telemetry and adaptive efficiency shaping for desktop, gaming, and entry-server applications.
FAQ
What is the function of the VAR_GATE_PM_ADDR pin on CHL8112A-01CRT?
This pin selects between Variable Gate Drive mode (low) and PMBus address configuration mode (high). When pulled low, it enables real-time adjustment of gate drive voltage based on load current; when high, it sets the device's PMBus address via resistor divider. It is not used in CHL8112B variants.
Does CHL8112A-01CRT support DDR5 memory power delivery?
No - CHL8112A-01CRT was designed for DDR3 and DDR4 Vtt tracking with AMD SVI/G34 and MPoL protocols. It does not support DDR5's VDDSOC or VDDQ dynamic scaling requirements, nor the newer AMD SP5/SP6 SVI2 interfaces required for EPYC Genoa/Bergamo platforms.
Can CHL8112A-01CRT operate without programming its NVM?
No - unprogrammed CHL8112A-01CRT parts will not power up. Configuration must be loaded via PMBus using CHiL Intuitive Power Designer (IPD) GUI. Default configuration file "00" is required for initial startup; customer-specific configurations use "xx" suffixes per ordering code.
How does the CHL8112A-01CRT handle phase shedding during light loads?
It supports programmable 1-phase or 2-phase operation under light load, plus Active Diode Emulation (ADE) to replace synchronous rectifier conduction with controlled high-side FET turn-on. This eliminates reverse recovery losses and improves efficiency below 5 A per loop without requiring external diode emulation circuitry.
CHL8112A-01CRT 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-01CRT FAQ
1.How can I place an order for CHL8112A-01CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8112A-01CRT 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-01CRT reliable?
The price and inventory of CHL8112A-01CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8112A-01CRT is usually 5 days.
3.What payment methods are accepted for CHL8112A-01CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8112A-01CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8112A-01CRT?
CHL8112A-01CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8112A-01CRT 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-01CRT?
For technical support, including CHL8112A-01CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8112A-01CRT requirements.
6.How does Aetrix verify that CHL8112A-01CRT is sourced from the original manufacturer or authorized distributors?
All CHL8112A-01CRT 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-01CRT meets industry standards.
7.What is the process for return or replacement of CHL8112A-01CRT?
All CHL8112A-01CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8112A-01CRT, 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-01CRT part is unused and in its original packaging.
Return procedure for CHL8112A-01CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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