L78M12ABDT-TR Integrated Circuits (ICs)

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L78M12ABDT-TR is a 3-terminal linear voltage regulator with 12 V fixed output voltage and 0.2 A maximum output current. It is suitable for a wide range of applications where precise voltage regulation is needed, such as embedded systems, power supplies, portable devices, automotive applications or battery-operated devices.

L78M12ABDT-TR consists of a voltage reference, an error amplifier, a series pass transistor and associated resistors and capacitors. It is capable of delivering up to 0.2 A of output current, with a maximum dropout voltage of 1.5 V at full load.

The voltage generated by the internal voltage reference is compared with the output voltage. The error amplifier controls the base resistor of the series pass transistor, in order to maintain the output voltage. If the output voltage increases, the error amplifier reduces the current through the base resistor, turning off the transistor and reducing the output voltage. Conversely, if the output voltage decreases, the error amplifier increases the current through the base resistor, turning on the transistor and increasing the output voltage.

L78M12ABDT-TR is suitable for a wide range of applications. It is designed for use in battery-operated systems, such as mobile phones or laptops, as it has a low quiescent current of only 35 μA, so it does not draw too much current from the battery. It is also suitable for automotive applications, as it has an operating temperature range of -40°C to +125°C, making it robust and reliable.

L78M12ABDT-TR is also suitable for applications in power supplies and embedded systems, as it has very good load and line regulation and very low output ripple, thanks to its low-power design and its efficient output regulation. Its low-pressure start, low-noise design, and thermal overload and short circuit protection, make it especially suitable for use in noise-sensitive applications.

Overall, L78M12ABDT-TR is a reliable and efficient voltage regulator, suitable for a wide range of applications. It offers precise voltage regulation, good load and line regulation, a low quiescent current, low noise, and comprehensive protection features.

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