TS78L03CT A3G

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The TS78L03CT A3G is an advanced low-dropout (LDO) voltage regulator manufactured by Texas Instruments. It offers a wide range of features, such as low quiescent current, low noise, high PSRR, and wide input voltage range, which make it suitable for a variety of applications. The TS78L03CT A3G is categorized as a linear regulator and fits into the product family of Power Management ICs (PMICs) and more specifically in the Voltage Regulators family.

Overview

The regulator is a linear type, capable of providing up to 3A output current. It works with input voltages between 2.4V to 20V and provides a regulated output voltage of 0.8V - 5V. With its 0.1%/V line regulation, it is able to adjust accurately to any input changes. The TS78L03CT A3G also includes a power-on reset (POR) with an active-low output to indicate the presence of the power supply. Additionally, this regulator is able to invert its output voltage when it reaches its maximum current capability.

Features

The TS78L03CT A3G offers some useful features that make it ideal for many applications. It has a low quiescent current of 65µA, which is about 3 times lower than the previous generation. This helps to reduce power consumption and extend battery life. Furthermore, the device features high PSRR, suitable for noisy environments, which helps to reduce output noise. This is further enhanced by the presence of fast transient response and low-noise operation, allowing the device to handle large load changes. Also, the device includes a thermal shutdown protection feature which disables the device in case of an overtemperature situation. All the above make the TS78L03CT A3G an ideal device for automotive, industrial and consumer applications.

Applications

Due to its broad range of features and its high accuracy, the TS78L03CT A3G is suitable for many applications such as automotive and industrial equipment, consumer electronics, and computer systems. It is particularly useful for automotive instruments and infotainment systems due to its wide input voltage range and low quiescent current. Furthermore, its high PSRR and low-noise characteristics make it suitable for consumer audio amplifiers and noise-sensitive systems. Additionally, it is a great choice for industrial power supplies, as it offers great performance and reliability.

Working Principle

The TS78L03CT A3G is a linear regulator, meaning it operates by taking the input voltage, setting a reference voltage, and then regulating the output voltage through an adjustable shunt resistor. The reference voltage is created by an op-amp circuit, which compares the output voltage with the reference voltage. When the output voltage becomes larger than the reference voltage, the op-amp turns on the shunt regulator, which shunts the excess current back to the input. This reduces the output voltage until it reaches the reference voltage, where it is maintained by the op-amp circuit. By doing this, the device is capable of regulating the output voltage accurately, irrespective of the input voltage.

Conclusion

The TS78L03CT A3G is a linear voltage regulator designed for a vast array of automotive, industrial, and consumer applications. It offers excellent performance thanks to its power-on reset, low quiescent current, high PSRR, low-noise, fast transient response and thermal shutdown features. Furthermore, it fits into the product family of Power Management ICs (PMICs) and more specifically in the Voltage Regulators family. As a result, the TS78L03CT A3G is an ideal device for its applications.

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