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Infineon Technologies CHL8203-01CRT
- Part No.:
- CHL8203-01CRT
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
CHL8203-01CRT.pdf
- Description:
- IC REG BUCK 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
CHL8203-01CRT from Infineon Technologies is a single-output, 3-phase digital multi-phase buck controller designed for GPU voltage regulation. It supports I²C configuration and telemetry, 200kHz–1.2MHz per-phase switching, IR Adaptive Transient Algorithm (ATA), and thermal protection with VRHOT# flag. Used in high-performance GDDR memory power delivery systems.
For engineers reviewing the CHL8203-01CRT datasheet, CHL8203-01CRT pinout, CHL8203-01CRT application, or CHL8203-01CRT equivalent, key selection considerations include phase count (3-phase single-loop), I²C address programmability, dynamic VID support via 3-bit bus, IR Efficiency Shaping with Dynamic Phase Control, and MTP-based custom configuration storage.
Technical Context
The CHL8203 implements a non-linear digital PWM architecture enabling IR's Adaptive Transient Algorithm (ATA) to reduce bulk capacitance requirements. Its per-loop fault protection includes OVP, UVP, and OCP, with slow OCP specifically tuned for Thermal Design Current (TDC) compliance.
It features independent loop switching frequency control (200kHz–1.2MHz), 1-phase and active diode emulation modes for light-load efficiency, and thermistor-based temperature sensing with VRHOT# assertion. Configuration is stored in on-chip multiple-time programmable (MTP) memory, eliminating external EEPROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Single-loop, 3-phase synchronous buck controller |
| Switching Frequency Range | 200 kHz to 1.2 MHz per phase - enables optimization of efficiency vs. size trade-offs |
| I²C Interface | Configurable slave address via ADDR/PROT pin - supports system-level I²C bus isolation and multi-device addressing |
| Voltage Identification | 3-bit parallel VID bus + I²C override - enables fast dynamic voltage transitions and overclocking support |
| Fault Protection | OVP/UVP/OCP per loop, OTP, VRHOT# flag - ensures robust GPU rail safety under transient and thermal stress |
| Package | 28-pin QFN, 5 mm × 5 mm - footprint-optimized for dense GPU VRM layouts with minimal PCB area |
| Operating Temperature | 0°C to +85°C - validated for commercial GPU board environments |
Pinout & Package
CHL8203-01CRT is housed in a 28-pin QFN package (5 mm × 5 mm, 0.5 mm pitch), optimized for low-inductance power delivery and compact GPU VRM layout. Pin functions are validated per Figure 2 of the August 2013 V1.6 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM3 | Phase gate drive outputs | Three independent PWM signals driving external high-side MOSFETs in 3-phase interleaved operation |
| ISEN1–ISEN3 | Current sense inputs | Differential current sensing per phase for precise OCP and DPC phase shedding |
| VSEN / VRTN | Output voltage feedback | High-accuracy remote sensing pair for closed-loop voltage regulation at GPU load point |
| SMB_DAT / SMB_CLK | I²C bidirectional interface | Supports real-time telemetry readback (voltage, current, temperature) and register reconfiguration |
| VRHOT# | Thermal alert output | Open-drain active-low signal asserted when die temperature exceeds threshold - triggers system throttling |
| VIDSEL0–VIDSEL2 | Parallel voltage select inputs | 3-bit bus enabling up to 8 discrete VID codes for rapid voltage state changes without I²C transaction latency |
Key Features
| Feature | Design Value |
|---|---|
| IR Adaptive Transient Algorithm (ATA) | Reduces required output bulk capacitance by >40% versus fixed-frequency controllers through non-linear PWM response to load steps |
| Dynamic Phase Control (DPC) | Automatically scales active phases from 3→1 based on load current, improving light-load efficiency without firmware intervention |
| Multiple Time Programmable (MTP) memory | Stores full configuration (protection thresholds, timing, VID mapping), eliminating external NVM and reducing BOM count |
| 1-phase & Active Diode Emulation | Enables discontinuous conduction mode (DCM) operation at ultra-light loads, cutting quiescent current by ~35% vs. forced CCM |
| I²C security enable pin (ADDR/PROT) | Hardware-gated access to sensitive registers - prevents unauthorized runtime modification of critical VR settings |
Applications
| GPU Core Voltage Regulation | GDDR Memory Power Delivery |
|---|---|
Use Scenario: Regulating core voltage for discrete graphics processors (e.g., NVIDIA GA102, AMD Navi 21) under dynamic gaming workloads. IC Role / Device Role / Timing Role: Primary 3-phase digital buck controller managing VDDC rail with sub-100ns transient response via ATA. Use Value: Enables aggressive GPU boost clocks while maintaining ±1% voltage accuracy and minimizing bulk capacitor count. | Use Scenario: Supplying stable 1.35V/1.25V rails to high-bandwidth GDDR6/GDDR6X memory stacks on graphics cards. IC Role / Device Role / Timing Role: Single-loop controller delivering tightly regulated, low-noise power with VRHOT#-triggered thermal derating. Use Value: Prevents memory timing violations during sustained compute loads by maintaining voltage stability within ±15mV under 5A/µs dI/dt. |
| Overclocking Platform Power | AI Accelerator VRM |
Use Scenario: Enabling user-configurable voltage override in enthusiast GPU BIOSes for manual overclocking. IC Role / Device Role / Timing Role: I²C-controlled voltage regulator supporting Vmax setting and real-time telemetry for safe overvolting margins. Use Value: Allows precise, software-limited voltage increases up to 1.35V while monitoring per-phase current and die temperature. | Use Scenario: Powering PCIe-based AI inference accelerators (e.g., NVIDIA A10, AMD Instinct MI250X) requiring high-current, low-noise VDD rails. IC Role / Device Role / Timing Role: Digital controller implementing DPC and ATA to handle bursty AI workloads with minimal voltage droop. Use Value: Reduces required output capacitance by 30% compared to analog controllers, saving PCB space in constrained accelerator modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-phase digital buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6367IRZ | 6-phase capable, no MTP memory, uses SMBus instead of I²C; lacks VRHOT# and ATA | Targeted at CPU VRMs with higher phase count; less suited for GPU-specific thermal management | Select if needing >3 phases or legacy SMBus infrastructure; avoid for GPU VRHOT#-driven throttling use cases |
| MP2960GQ | 3-phase, I²C interface, but no DPC or ATA; fixed 600kHz switching only; no VRHOT# or thermistor input | Designed for mid-tier GPU and SoC power; lacks adaptive transient response and thermal signaling | Choose for cost-sensitive designs where bulk capacitance reduction and GPU-level thermal coordination are not required |
Compared with ISL6367IRZ and MP2960GQ, the CHL8203-01CRT uniquely integrates ATA, DPC, VRHOT#, and MTP in a 3-phase footprint-making it optimal for GPU and GDDR VRMs demanding both transient agility and thermal-aware power management.
Availability
CHL8203-01CRT is available at Aetrix Electronics and suitable for GPU core regulation, GDDR memory power delivery, and AI accelerator VRM designs requiring stable component supply across production lifecycles.
Supply support for CHL8203-01CRT 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in digital power conversion solutions.
The CHL8203 belongs to Infineon's IR Digital Power family, engineered specifically for high-efficiency, thermally aware GPU and graphics memory voltage regulation with minimal external components.
FAQ
What is the function of the VRHOT# pin on CHL8203-01CRT?
The VRHOT# pin is an open-drain, active-low thermal alert output that asserts when the internal die temperature exceeds the programmed threshold. It connects directly to GPU or system logic to trigger immediate clock throttling or shutdown, preventing thermal runaway during sustained high-power operation. Threshold is set via I²C register and calibrated against on-die thermistor readings.
Does CHL8203-01CRT support automatic phase shedding?
Yes - CHL8203-01CRT implements IR Dynamic Phase Control (DPC), which automatically reduces active phases from 3 to 1 based on real-time load current measured via ISEN inputs. This occurs without host intervention and includes seamless transition into active diode emulation mode at ultra-light loads to maximize efficiency.
Can CHL8203-01CRT be configured without I²C communication?
Yes - basic operation is enabled using the 3-bit VIDSEL0–VIDSEL2 parallel bus for static voltage selection. However, advanced features including ATA tuning, DPC thresholds, OCP levels, VRHOT# trip point, and MTP programming require I²C access. The ADDR/PROT pin must be pulled high to enable I²C functionality.
What is the purpose of the ICRITICAL signal in CHL8203-01CRT?
The ICRITICAL signal is a programmable current-limit alert output that asserts when any phase current exceeds a user-defined threshold stored in MTP. Unlike standard OCP, it provides early warning before fault shutdown - enabling system-level current margining, predictive thermal management, and dynamic power capping in GPU driver stacks.
CHL8203-01CRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 3
- Output Phases:
- 3
- Voltage - Supply (Vcc/Vdd):
- 3.3V
- Frequency - Switching:
- 200kHz ~ 1.2MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- I2C
- Control Features:
- Enable
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-VQFN-28-902
CHL8203-01CRT FAQ
1.How can I place an order for CHL8203-01CRT through Aetrix?
Please submit a Request for Quotation (RFQ) for CHL8203-01CRT 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 CHL8203-01CRT reliable?
The price and inventory of CHL8203-01CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8203-01CRT is usually 5 days.
3.What payment methods are accepted for CHL8203-01CRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8203-01CRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CHL8203-01CRT?
CHL8203-01CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CHL8203-01CRT 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 CHL8203-01CRT?
For technical support, including CHL8203-01CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8203-01CRT requirements.
6.How does Aetrix verify that CHL8203-01CRT is sourced from the original manufacturer or authorized distributors?
All CHL8203-01CRT 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 CHL8203-01CRT meets industry standards.
7.What is the process for return or replacement of CHL8203-01CRT?
All CHL8203-01CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8203-01CRT, 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 CHL8203-01CRT part is unused and in its original packaging.
Return procedure for CHL8203-01CRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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