Infineon TLE7272-2D: A 200 mA Low-Dropout Voltage Regulator for Automotive Applications

In the demanding world of automotive electronics, where components must operate flawlessly under extreme temperatures, voltage fluctuations, and stringent safety requirements, power management becomes a critical design challenge. Addressing this need, Infineon Technologies has developed the TLE7272-2D, a robust 200 mA low-dropout (LDO) voltage regulator engineered specifically for the automotive environment.

The primary role of the TLE7272-2D is to provide a clean, stable, and precisely regulated voltage to sensitive integrated circuits (ICs) such as microcontrollers, sensors, and system-on-chips (SoCs) from the noisy and variable automotive battery supply, which can range from 4.5 V to 42 V. Its low-dropout voltage is a key feature, enabling it to continue regulating its output even when the input voltage is only slightly higher than the desired output. This is crucial during critical automotive events like a cold-crank, where the battery voltage can momentarily dip to very low levels.

Beyond basic regulation, the TLE7272-2D is packed with features that exemplify its "designed for automotive" pedigree. It offers a very low quiescent current, both in operational and standby modes, which is essential for minimizing battery drain in modern vehicles, especially when in key-off or sleep mode. The device incorporates comprehensive protection mechanisms, including over-current protection (OCP), over-temperature shutdown (TSD), and reverse polarity protection, safeguarding both the regulator itself and the downstream load. Furthermore, its high immunity to electromagnetic interference (EMI) ensures reliable operation in the electrically noisy environment of a car.

The regulator is available in adjustable and fixed output voltage versions (e.g., 3.3 V, 5.0 V), providing design flexibility. It is housed in a thermally enhanced PG-TO252-3-11 package, which efficiently dissipates heat, allowing the IC to deliver its full 200 mA output current over the entire automotive temperature range (-40 °C to 150 °C). Its AEC-Q100 qualification guarantees its reliability and performance meets the rigorous standards set by the automotive industry.

Typical applications are vast, spanning body control modules, instrument clusters, infotainment systems, and advanced driver-assistance systems (ADAS), wherever a local, noise-free power rail is required.

ICGOODFIND Summary:

The Infineon TLE7272-2D stands out as a highly reliable and efficient LDO voltage regulator. Its combination of a wide input voltage range, ultra-low dropout, minimal quiescent current, and robust integrated protection makes it an superior choice for powering electronic control units (ECUs) in automotive applications, ensuring stable operation even under the most challenging conditions.

Keywords:

Low-Dropout (LDO) Regulator

Automotive Grade

200 mA Output Current

Quiescent Current

AEC-Q100 Qualified