Infineon TLE4699: A Low-Dropout Voltage Regulator for Automotive and Industrial Applications
In the demanding environments of modern automotive and industrial systems, stable and reliable power supply is non-negotiable. The Infineon TLE4699 stands out as a high-performance low-dropout (LDO) voltage regulator engineered specifically to meet the rigorous requirements of these applications. Combining high accuracy, robust protection features, and exceptional reliability, this IC is a cornerstone for power management in critical electronic systems.
The TLE4699 is designed to deliver a fixed output voltage, available in various versions from 2.5 V to 5.0 V, with a maximum output current of 250 mA. A key metric for any LDO is its dropout voltage—the minimum difference required between input and output voltage to maintain regulation. The TLE4699 excels here, featuring an extremely low dropout voltage of typically 200 mV at 150 mA load. This high efficiency is crucial for automotive applications, where it must continue to regulate stably even as the battery voltage dips during cold-crank scenarios, often dropping as low as 3.0 V.
Beyond its efficiency, the device is characterized by its very low quiescent current in both operational and standby modes. This is a vital attribute for reducing the overall power consumption of the system, which is especially important for "always-on" components in vehicles that must minimize drain on the battery.
Robustness is at the core of the TLE4699's design. It is built to withstand the harsh conditions of the automotive world, operating reliably over a wide temperature range from -40 °C to 150 °C. It incorporates a comprehensive suite of integrated protection features, including:
Overcurrent protection which safeguards the regulator and the load.
Overtemperature shutdown that prevents thermal runaway.
Reverse polarity protection for resilience against accidental battery misconnection.
Overvoltage protection (e.g., load dump survival).
Furthermore, the high immunity to electromagnetic interference (EMI) ensures stable operation even in electrically noisy environments typical of industrial machinery and automotive engine control units (ECUs). Its high accuracy of ±2% over the entire temperature and input voltage range guarantees that sensitive microcontrollers and sensors receive a precise voltage supply.
The TLE4699 is offered in a space-saving PG-TO252-5 (DPAK) package, making it suitable for PCB designs where space is at a premium. Its AEC-Q100 qualification confirms its compliance with the stringent quality and reliability standards mandated by the global automotive industry.
The Infineon TLE4699 is a premier LDO voltage regulator that sets a benchmark for power supply integrity. Its exceptional combination of low dropout voltage, high accuracy, ultra-low quiescent current, and a full suite of protective features makes it an ideal and robust choice for powering critical electronics in automotive and industrial systems, ensuring longevity and reliability under the most challenging conditions.
Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Quiescent Current, Dropout Voltage, Integrated Protection
