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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Infineon Technologies CHL8103-01CRT

Name: CHL8103-01CRT
Brand: Infineon Technologies
SKU: CHL8103-01CRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CHL8103-01CRT

Manufacturer:: Infineon Technologies

Category:: DC DC Switching Controllers

Package:: 40-VFQFN Exposed Pad

Datasheet:: CHL8103-01CRT.pdf

Description:: IC REG BUCK 40VQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CHL8103-01CRT from Infineon Technologies is a dual-loop, digital multi-phase buck controller for CPU voltage regulation in Intel® VR12 and AMD® SVI systems. It supports 2/3/4+1-phase operation per loop, features I²C programmability with pin-selectable address, independent 200kHz–1.2MHz switching per phase, IR Dynamic Phase Control (DPC), and Adaptive Transient Algorithm (ATA) for bulk capacitor reduction.

For engineers reviewing the CHL8103-01CRT datasheet, CHL8103-01CRT pinout, CHL8103-01CRT application, or CHL8103-01CRT equivalent, key selection criteria include VR12/SVI compliance, dual-loop OCP protection, thermal monitoring via VRHOT# and TSEN inputs, MTP configuration storage, and QFN-40 6×6 mm package compatibility with CHL8325A/B footprints.

Technical Context

The CHL8103-01CRT implements two independent digital PWM control loops with separate OVP/UVP/OCP fault detection per loop and shared thermal protection including VRHOT# assertion and thermistor-based temperature sensing on TSEN1/TSEN2. Its I²C interface enables real-time telemetry, voltage override, and secure configuration via ADDR/PROT pin and SMB_DAT/SMB_CLK lines.

It integrates IR Efficiency Shaping technology with 1-phase and active diode emulation modes for light-load efficiency, and supports both Intel VR12 (SVI2) and AMD SVI protocols through dedicated SV_ALERT1/SV_CLK1/SV_DAT1 pins and mode-select configuration (Intel Mode / AMD Mode pins).

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Dual-loop digital multi-phase buck controller for CPU VR
Phase Support	2/3/4+1-phase per loop; CHL8103 supports up to 4+1 on Loop 1, 2+1 on Loop 2
Switching Frequency	200 kHz to 1.2 MHz per phase, independently programmable
I²C Interface	Configurable address via ADDR pin; supports telemetry, voltage override, security enable
Fault Protection	Per-loop OVP/UVP/OCP; OTP with VRHOT# flag; thermistor input on TSEN1/TSEN2
Supply Voltage	3.3 V ±10%/−15%; operates from 0°C to +85°C ambient
Package	40-pin QFN, 6 mm × 6 mm, 0.5 mm pitch, RoHS-compliant

Pinout & Package

CHL8103-01CRT is housed in a 40-pin QFN package (6 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Infineon's CHL8103/04 datasheet Rev. V1.09 (2013), Figure 1.

Pin/Terminal	Circuit Role	Design Meaning
PWM1–PWM4	Phase gate drive outputs (Loop 1)	PWM1–PWM3 active; PWM4 = NC on CHL8103 (used on CHL8104)
PWM_L2	Phase gate drive output (Loop 2)	Single-phase output for second loop; supports 2+1 configuration
ISEN1–ISEN3, ISEN_L2	Current sense inputs	Per-phase current sensing for OCP; ISEN_L2 dedicated to Loop 2
VSEN, VSEN_L2	Output voltage feedback inputs	Remote sensing for each loop; enables precise load-line regulation
TSEN1, TSEN2	Thermistor interface inputs	Analog inputs for external NTC thermistors; trigger VRHOT# on overtemperature
SMB_DAT, SMB_CLK	I²C bidirectional data/clock	Supports configuration, telemetry, and secure register access
VR_HOT#, ENABLE	Thermal alert & global enable	Open-drain VRHOT# flag; ENABLE asserts full controller operation
ADDR/PROT/EN_L2	Address select / security / Loop 2 enable	3-state pin defining I²C address bits and enabling secure mode or Loop 2

Key Features

Feature	Design Value
Dual independent control loops	Enables simultaneous regulation of CPU core and GT/IO voltages with separate fault handling
IR Adaptive Transient Algorithm (ATA)	Reduces required output bulk capacitance by >30% vs. fixed-gain PID controllers
Dynamic Phase Control (DPC)	Automatically adds/drops phases based on load; enters 1-phase + diode emulation below ~10% load
Multiple Time Programmable (MTP) memory	Stores custom configurations (loop gains, OCP thresholds, timing) without external EEPROM
VR12 & AMD SVI protocol support	Direct interface to Intel VRD12 and AMD SVI2 platforms via SV_ALERT1/SV_CLK1/SV_DAT1 pins

Applications

Desktop CPU VR

Server DDR Memory VR

Use Scenario: High-performance desktop motherboard regulating Intel Core i7/i9 CPU core voltage (V_CCIN) and graphics voltage (V_GT) simultaneously.

IC Role / Device Role / Timing Role: Dual-loop digital buck controller managing two independent VR phases with coordinated transient response.

Use Value: ATA minimizes bulk capacitors; DPC improves light-load efficiency; VR12 compliance ensures plug-and-play compatibility with Intel reference designs.

Use Scenario: Dual-socket server board supplying regulated DDR4/DDR5 memory termination voltage (V_DDQ) and auxiliary I/O voltage (V_PP).

IC Role / Device Role / Timing Role: Dual-loop controller delivering tightly coupled, low-noise power to memory subsystems with independent OCP per rail.

Use Value: Per-loop UVP/OVP prevents memory corruption during brown-out; thermistor monitoring avoids thermal throttling in dense DIMM layouts.

AMD Platform CPU VR

Embedded Computing VR

Use Scenario: Mini-ITX workstation supporting AMD Ryzen Threadripper with SVI2 interface for CPU core (V_DD) and SoC (V_DDIO) rails.

IC Role / Device Role / Timing Role: SVI2-compliant dual-loop controller using SV_ALERT1/SV_CLK1/SV_DAT1 for dynamic VID updates and telemetry reporting.

Use Value: Pin-programmable I²C address allows multiple CHL8103 units on same bus; MTP stores platform-specific compensation settings.

Use Scenario: Fanless industrial PC requiring silent, reliable CPU power under extended temperature cycling (0°C–85°C).

IC Role / Device Role / Timing Role: Digital VR controller with OTP and VRHOT# for fail-safe thermal shutdown in sealed enclosures.

Use Value: QFN-40 package enables compact layout; 3.3V supply tolerance accommodates aging DC-DC converters; RoHS compliance meets EU industrial directives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-loop digital buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CHL8104-01CRT	Supports full 4+1-phase on Loop 1 (vs. 4+1/2+1 on CHL8103); includes ISEN4 and IRTN4 pins	Required for higher-current CPU cores needing >4 phases; not drop-in for CHL8103 PCBs due to extra pins	Select when peak load exceeds 200 A per loop and layout accommodates additional sense paths
IR35201MTRPBF	Single-loop, 6+1-phase controller; lacks dual-loop architecture and SVI support	Suitable only for single-rail applications (e.g., DDR VR); cannot replace CHL8103 in dual-rail CPU VR	Choose only for cost-sensitive single-output designs where dual-loop functionality is unnecessary

Compared with CHL8104-01CRT, CHL8103-01CRT trades phase count for smaller footprint and lower pin count-ideal for mid-tier CPUs. Versus IR35201, it delivers true dual-rail independence and SVI protocol support, eliminating need for secondary controllers in AMD/Intel platforms.

Availability

CHL8103-01CRT is available at Aetrix Electronics and suitable for high-performance desktop CPU VRs, server DDR memory VRs, AMD platform power delivery, and embedded computing applications requiring stable component supply and long-lifecycle support.

Supply support for CHL8103-01CRT 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 controller innovation since the early 2000s.

The CHL8103-01CRT belongs to Infineon's CHL81xx digital multi-phase buck controller family, designed specifically for high-efficiency, low-footprint CPU voltage regulation in Intel VR12 and AMD SVI platforms.

FAQ

What is the maximum supported phase count per loop on CHL8103-01CRT?

CHL8103-01CRT supports up to 4+1 phases on Loop 1 and 2+1 phases on Loop 2. Unlike CHL8104, it omits ISEN4 and IRTN4 pins-making it optimized for mid-range CPU loads up to ~160 A per loop. The "+1" denotes optional phase for transient headroom, configurable via MTP.

Does CHL8103-01CRT require an external EEPROM for configuration?

No. CHL8103-01CRT integrates Multiple Time Programmable (MTP) non-volatile memory that stores all configuration registers-including loop gains, OCP thresholds, ATA parameters, and I²C address-eliminating need for external EEPROM and reducing BOM count and PCB area.

How does VRHOT# differ from standard OTP in CHL8103-01CRT?

VRHOT# is an open-drain thermal alert signal asserted when die temperature exceeds a user-configurable threshold (via MTP), while standard OTP shuts down the controller entirely. VRHOT# enables system-level thermal management (e.g., throttling CPU frequency) before catastrophic shutdown, preserving system responsiveness.

Can CHL8103-01CRT operate in both Intel VR12 and AMD SVI modes simultaneously?

No. CHL8103-01CRT operates in either Intel VR12 mode or AMD SVI mode, selected by hardwiring the MODE pin (Pin 1 = Intel, Pin 2 = AMD). Both modes share the same I²C interface but use different command sets and VID encoding-mode selection must match the host processor's protocol.

CHL8103-01CRT 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:: 4

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, Power Good

Operating Temperature:: 0°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-VQFN-40-903

CHL8103-01CRT FAQ

1.How can I place an order for CHL8103-01CRT through Aetrix?

Please submit a Request for Quotation (RFQ) for CHL8103-01CRT 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 CHL8103-01CRT reliable?

The price and inventory of CHL8103-01CRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CHL8103-01CRT is usually 5 days.

3.What payment methods are accepted for CHL8103-01CRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CHL8103-01CRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CHL8103-01CRT?

CHL8103-01CRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CHL8103-01CRT 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 CHL8103-01CRT?

For technical support, including CHL8103-01CRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CHL8103-01CRT requirements.

6.How does Aetrix verify that CHL8103-01CRT is sourced from the original manufacturer or authorized distributors?

All CHL8103-01CRT 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 CHL8103-01CRT meets industry standards.

7.What is the process for return or replacement of CHL8103-01CRT?

All CHL8103-01CRT units undergo pre-shipment inspection (PSI). If there is an issue with CHL8103-01CRT, 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 CHL8103-01CRT part is unused and in its original packaging.

Return procedure for CHL8103-01CRT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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