Infineon TLE7272-2E: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive electronics and robust industrial control systems, power integrity is non-negotiable. Voltage regulators are the silent guardians of this integrity, ensuring that sensitive microcontrollers, sensors, and ASICs receive a clean, stable supply voltage regardless of input fluctuations or load changes. The Infineon TLE7272-2E stands out as a premier solution engineered specifically to meet the rigorous challenges of these applications.

This device is a 5-V low-dropout (LDO) linear voltage regulator capable of delivering a continuous output current of up to 250 mA. Its key operational advantage is its remarkably low dropout voltage—typically 200 mV at 150 mA load current. This means it can continue to provide a stable 5-V output even when the input voltage dips as low as 5.2 V, making it exceptionally efficient and vital for cold-crank conditions in automobiles or during brownouts in industrial settings.

Robustness and reliability are at the core of its design. The TLE7272-2E is qualified for the stringent AEC-Q100 automotive standard, guaranteeing its performance across the harsh automotive temperature range (-40°C to 150°C junction temperature). It incorporates a comprehensive suite of built-in protection features, including:

Overcurrent protection to safeguard the device and the load.

Overtemperature shutdown to prevent thermal runaway.

Reverse polarity protection (up to -42 V), a critical feature for automotive applications where misconnection is a risk.

Overvoltage protection (load dump resilience) on the input line.

Furthermore, the regulator offers excellent electromagnetic compatibility (EMC) performance and features an enable/shutdown pin that allows for external control of the output, facilitating power management strategies to reduce quiescent current in stand-by modes. Its low quiescent current in operation makes it an ideal choice for always-on applications like ECU wake-up circuits or battery-powered sensors.

ICGOOODFIND: The Infineon TLE7272-2E is a highly robust and reliable 5-V LDO regulator that sets a high standard for power supply design. Its exceptional combination of low dropout voltage, extensive protection mechanisms, and AEC-Q100 qualification makes it an indispensable component for ensuring system stability and longevity in the most demanding automotive and industrial environments.

Keywords: Low-Dropout (LDO) Regulator, AEC-Q100, Automotive Grade, Reverse Polarity Protection, Load Dump Resilience.