Infineon TLE4242G: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive systems and industrial applications, stable and reliable power supply is non-negotiable. The Infineon TLE4242G stands out as a quintessential 5-V low-dropout (LDO) voltage regulator engineered to meet these rigorous demands. Combining high performance with robust protection features, this IC ensures critical electronic components operate smoothly even under the most challenging conditions.

Key Features and Technical Highlights

The TLE4242G is designed to deliver a fixed 5-V output voltage with a maximum output current of 350 mA. Its low dropout voltage—typically 200 mV at 150 mA—enhances efficiency, making it ideal for applications where the input voltage closely approaches the output level. This is particularly valuable in automotive scenarios, where battery voltage can fluctuate significantly.

A standout attribute is its exceptional accuracy, with output voltage tolerance within ±2% over the entire temperature range, load, and input voltage variations. The device incorporates comprehensive protection mechanisms, including overcurrent protection, overtemperature shutdown, and reverse polarity protection. Additionally, its active reset circuit with adjustable delay time provides monitored output voltage supervision, crucial for microcontroller-based systems requiring controlled start-up and shutdown sequences.

Automotive and Industrial Suitability

Qualified according to AEC-Q100, the TLE4242G is tailored for automotive electronics, such as engine control units (ECUs), sensors, and infotainment systems. Its ability to operate over a wide temperature range (-40 °C to 150 °C) and withstand high transient voltages ensures longevity and reliability. In industrial settings, it powers PLCs, actuators, and measurement equipment, where immunity to noise and voltage spikes is paramount.

The regulator’s minimal external component count—requiring only input and output capacitors—simplifies design and reduces board space. Its stable operation with low-ESR capacitors further eases implementation.

ICGOODFIND Summary

The Infineon TLE4242G is a robust, high-precision LDO voltage regulator that excels in providing stable power for automotive and industrial systems. With its low dropout voltage, integrated protections, and supervisory functions, it offers designers a reliable solution for power management in harsh environments.

Keywords: Low-Dropout Regulator, Automotive Electronics, Overcurrent Protection, Voltage Supervision, AEC-Q100