Infineon TLE4305G Low-Dropout Linear Voltage Regulator: Features and Applications
The Infineon TLE4305G is a precision low-dropout (LDO) linear voltage regulator designed to deliver a fixed 5V output from a higher input voltage. Renowned for its high accuracy and robust performance, it is engineered to meet the demanding requirements of automotive and industrial applications. Its core function is to provide a stable, clean, and reliable voltage supply to sensitive microcontrollers, sensors, and other critical circuitry.
Key Features of the TLE4305G
The TLE4305G integrates a suite of advanced features that make it a standout component in power management design.
Low Dropout Voltage: With a typical dropout voltage of only 200 mV at 150 mA, the regulator can maintain a stable 5V output even when the input voltage dips very close to the output level. This efficiency is crucial in automotive environments where battery voltage can fluctuate significantly.
High Output Accuracy: The device offers a highly precise output voltage with an initial accuracy of ±2%. This ensures that connected components receive the exact voltage they require for optimal operation.
Wide Input Voltage Range: Operating from an input voltage range of 5.5 V to 42 V, the TLE4305G is exceptionally versatile. It can handle load-dump transients common in 12V and 24V automotive systems, making it exceptionally robust.
Integrated Protection Functions: Infineon has equipped this LDO with comprehensive protection mechanisms. These include current limiting, overtemperature shutdown, and reverse polarity protection. These features safeguard both the regulator itself and the downstream components from damage under fault conditions.
Enable Function: The inclusion of an enable pin (EN) allows for external on/off control of the regulator. This facilitates power management sequencing and helps reduce the overall quiescent current to a mere 65 µA (typical) when disabled, conserving energy in battery-operated systems.
Primary Applications
The robust feature set of the TLE4305G directly translates into a wide array of practical applications, particularly in harsh electrical environments.
Automotive Electronics: It is an ideal choice for powering control units throughout the vehicle, including body control modules (BCMs), sensor systems, infotainment clusters, and lighting control modules. Its ability to withstand voltage transients and its wide operating temperature range meet stringent automotive qualifications.
Industrial Control Systems: In factory automation and process control, the TLE4305G provides clean power to PLCs, sensors, and actuators, ensuring reliable operation amidst electrical noise and unstable mains-derived voltages.
Consumer and Communication Equipment: Any application requiring a stable 5V rail from a higher, unregulated DC source (e.g., 9V, 12V, or 24V adapters) can benefit from its regulation and protection features.
ICGOOODFIND
The Infineon TLE4305G is a robust and highly reliable low-dropout voltage regulator that excels in demanding environments. Its combination of a wide input voltage range, low dropout, high accuracy, and comprehensive integrated protection makes it a superior choice for designers seeking a durable power solution for automotive and industrial systems.
Keywords:
Low-Dropout (LDO) Regulator
Automotive Grade
Wide Input Voltage Range
Reverse Polarity Protection
Voltage Regulation
