My Inquiry
My Account
Infineon Technologies CHL8112A-04CRT
- Part No.:
- CHL8112A-04CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
CHL8112A-04CRT.pdf
- Description:
- IC REG BUCK 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CHL8112A-04CRT 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, and Vtt tracking for DDR memory. It operates from +3.3 V supply, features CHiL Adaptive Transient Algorithm (ATA), and is housed in a 6×6 mm 40-pin QFN package.
For engineers reviewing the CHL8112A-04CRT datasheet, CHL8112A-04CRT pinout, CHL8112A-04CRT application, or CHL8112A-04CRT equivalent, key selection considerations include per-loop fault protection (OVP/UVP/OCP/OTP/CFP), SMBus/PMBus telemetry interface, NVM-based configuration storage, and support for coupled inductors with auto-phase detection.
Technical Context
The CHL8112A-04CRT implements two independent digital PWM control loops with proprietary non-linear digital algorithms enabling CHiL Adaptive Transient Algorithm (ATA) for minimized bulk capacitance. Each loop supports real-time voltage, current, temperature, and power telemetry via I²C/SMBus/PMBus up to 16-device addressing.
It integrates CHiL Efficiency Shaping Technology including Variable Gate Drive (enabled via VAR_GATE_PM_ADDR pin) and Dynamic Phase Control-automatically scaling active phases (1-, 2-, or 5-phase) and enabling active diode emulation at very light loads. The device supports AMD SVI-compliant command protocols and includes dedicated pins for VRHOT#1/VRHOT_ICRIT#2 thermal alerts and SMB_ALERT# server signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-loop digital multi-phase buck controller with 5 total phases |
| Switching Frequency | 200 kHz to 1.2 MHz per phase; configurable per loop |
| Control Interface | I²C/SMBus/PMBus v1.1 compliant; supports up to 16-device daisy-chain |
| Fault Protection | Per-loop OVP, UVP, OCP, OTP, CFP; thermistor-based temperature sensing with VRHOT# signal |
| Memory | On-chip non-volatile memory (NVM) stores custom configuration and fault thresholds |
| Supply Voltage | +3.3 V nominal; operates from 0°C to +85°C ambient |
| Package | 6×6 mm, 40-pin QFN; RoHS-compliant, Pb-free |
Pinout & Package
CHL8112A-04CRT is housed in a 6×6 mm, 40-pin QFN package with exposed thermal pad. Pin functions are mode-dependent (AMD vs. MPoL), and pin assignments include dedicated signals for dual-loop telemetry, phase enable/control, thermal monitoring, and PMBus address configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM5 | Phase gate drive outputs | Drive external high-side MOSFETs; support coupled inductor operation with paired phase addition/dropping |
| ISEN1–ISEN5 | Current sense inputs | Per-phase current sensing for dual OCP; enables I-spike detection on AMD CPUs |
| VSEN / VSEN_L2 | Voltage feedback inputs | Remote sense for Loop 1 and Loop 2 output voltages; supports Vtt tracking for DDR memory |
| SMB_CLK / SMB_DIO / SMB_ALERT# | PMBus interface signals | Enable bidirectional telemetry (voltage, current, temp, power); SMB_ALERT# provides server-level fault signaling |
| VAR_GATE_PM_ADDR | Configuration input | Selects between PMBus address assignment or Variable Gate Drive mode (CHL8112A-specific) |
| VR_READY1 / VR_READY_L21 | Power-good outputs | Asserted when respective loop output is within regulation tolerance; used for system sequencing |
Key Features
| Feature | Design Value |
|---|---|
| CHiL Adaptive Transient Algorithm (ATA) | Reduces required output bulk capacitance by >30% vs. conventional digital controllers via non-linear transient response tuning |
| Dynamic Phase Control | Automatically scales active phases (1/2/5) based on real-time load current to maintain peak efficiency across 1–100% load range |
| Variable Gate Drive | Adjusts high-side MOSFET gate drive voltage dynamically with load current to minimize conduction + switching losses |
| Auto-Phase Detection | Identifies connected phases at startup and applies auto-compensation for inter-phase current imbalance without external calibration |
| NVM Configuration Storage | Eliminates external EEPROM; stores loop-specific settings (OCP thresholds, ramp rates, telemetry scaling) for repeatable, set-and-forget deployment |
Applications
| AMD CPU Power Delivery | DDR Memory Vtt Tracking |
|---|---|
Use Scenario: High-performance desktop and server platforms using AMD Socket G34 or AM3+ CPUs requiring dynamic voltage scaling and fast transient response. IC Role / Device Role / Timing Role: Dual-loop controller managing VDDIO and VDD cores independently, with SVI protocol compliance and per-loop OCP for I-spike protection. Use Value: Enables stable overclocking via Vmax setting and reduces VR bulk capacitor count by 40% using ATA and coupled inductor support. | Use Scenario: DDR3/DDR4 memory subsystems requiring precise Vtt tracking with tight regulation and low noise. IC Role / Device Role / Timing Role: Loop 2 delivers tightly regulated Vtt referenced to memory VDDQ; uses VSEN_L2 and RCSM_L2/RCSP_L2 for remote sensing and current monitoring. Use Value: Maintains ±1% Vtt accuracy over temperature and load, eliminating need for external tracking ICs and reducing BOM cost. |
| Gaming Platform VRMs | Server-Scale Power Management |
Use Scenario: Enthusiast gaming motherboards demanding adaptive phase shedding, overclocking headroom, and thermal-aware throttling. IC Role / Device Role / Timing Role: Implements Overclocking & Gaming Mode with user-configurable Vmax and VR_HOT#1 thermal alert for GPU/CPU co-location scenarios. Use Value: Delivers 92% peak efficiency at 50 A and sustains >85% efficiency down to 2 A via active diode emulation and 1-phase light-load mode. | Use Scenario: 1U/2U rack servers requiring telemetry aggregation, fault logging, and coordinated power sequencing across multiple VR domains. IC Role / Device Role / Timing Role: Uses SMB_ALERT# and PMBus to report faults (OCP, OTP, UVP) to BMC; supports daisy-chained telemetry from up to 16 VRMs. Use Value: Reduces firmware development effort by providing standardized register map and eliminates need for custom sensor fusion logic. |
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; fixed 600 kHz–1.2 MHz frequency range | Lacks Vtt tracking and MPoL mode; requires external EEPROM for configuration | Preferred where driver integration reduces board area but configurability and memory retention are secondary |
| TPS53689 | TI dual-loop controller with D-CAP3 modulation; supports 3–6 phases; no PMBus v1.1 compliance or VRHOT# signal | No native AMD SVI support; uses proprietary AVS bus instead of SMBus for telemetry | Selected for TI ecosystem designs prioritizing ease of loop tuning over AMD platform compatibility |
Compared with IR3567B and TPS53689, the CHL8112A-04CRT uniquely combines AMD SVI/G34 compliance, on-chip NVM, Vtt tracking, and VRHOT# thermal alert-making it the only option qualified for high-end AMD server and overclocking platforms requiring full telemetry and safe boot configuration.
Availability
CHL8112A-04CRT is available at Aetrix Electronics and suitable for AMD CPU power delivery, DDR memory Vtt tracking, and gaming-platform VRM designs requiring stable component supply, long-lifecycle support, and factory-programmed configuration files.
Supply support for CHL8112A-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 Corp., headquartered in Tewksbury, MA, is a fabless analog/mixed-signal IC company specializing in high-efficiency digital power management solutions for computing and datacenter applications.
The CHL8112A product line was designed specifically for AMD platform adoption-delivering SVI-compliant, dual-loop, multi-phase buck control with integrated telemetry, adaptive transient response, and robust fault handling for next-generation CPU and memory VRMs.
FAQ
What configuration file is preloaded on CHL8112A-04CRT?
The "-04" suffix indicates this unit ships with configuration file 04 stored in on-chip NVM. This file defines default loop parameters-including OCP thresholds, switching frequency (600 kHz), phase assignment (3+2), and Vtt tracking ratio-optimized for mainstream AMD AM3+ platforms. No external programming is required for basic operation.
Does CHL8112A-04CRT support both AMD SVI and Intel VRD protocols?
No. CHL8112A-04CRT is explicitly designed for AMD SVI/G34 and Memory MPoL protocols only. It does not implement Intel VRD, SVID, or IMVP specifications. Its command register map, timing requirements, and telemetry structure align exclusively with AMD's serial voltage identification interface.
Can CHL8112A-04CRT operate without PMBus communication?
Yes. The device supports autonomous operation using factory-programmed NVM settings. PMBus is optional for runtime telemetry, reconfiguration, or fault logging. Startup and regulation occur immediately after power-up if valid configuration is present in NVM-no host initialization is required.
What external components are mandatory for CHL8112A-04CRT to function?
Mandatory components include: five high-side MOSFET drivers (e.g., CHL8510), five bootstrap capacitors, two RC networks for current sensing (RCSM/RCSP per loop), one thermistor per loop for temperature sensing, and decoupling capacitors on VCC and VINSEN. Coupled inductors are recommended but not strictly required.
CHL8112A-04CRT 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-04CRT FAQ
1.How can I place an order for CHL8112A-04CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8112A-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 CHL8112A-04CRT reliable?
The price and inventory of CHL8112A-04CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8112A-04CRT is usually 5 days.
3.What payment methods are accepted for CHL8112A-04CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8112A-04CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8112A-04CRT?
CHL8112A-04CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8112A-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 CHL8112A-04CRT?
For technical support, including CHL8112A-04CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8112A-04CRT requirements.
6.How does Aetrix verify that CHL8112A-04CRT is sourced from the original manufacturer or authorized distributors?
All CHL8112A-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 CHL8112A-04CRT meets industry standards.
7.What is the process for return or replacement of CHL8112A-04CRT?
All CHL8112A-04CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8112A-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 CHL8112A-04CRT part is unused and in its original packaging.
Return procedure for CHL8112A-04CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CHL8112A-04CRT Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
