TPS71818-27YZCT

TPS71818-27YZCT Application Field and Working Principle

Power Management and Integrated Circuit (PMICs) are integrated circuits that combine multiple functions for the power-management solutions for different electronics. PMICs are often used in increasingly complex designs to simplify power-supply architectures and reduce system complexity. Voltage Regulators are one of the most important component of a PMIC, and linear voltage regulators are the most common type of voltage regulator. As an example, let’s look into the working principle and application fields of the TPS71818-27YZCT linear voltage regulator.

Introduction to the TPS71818-27YZCT

The TPS71818-27YZCT is a high-speed CMOS low-voltage linear voltage regulator. It works by using a linear voltage regulator circuit to provide normal regulation at very low load current and is suitable for input voltages downward from 3.2V to 1.8V. The output voltage is adjustable from 0.8V to 2.8V. Built-in series protection over temperature, over current and ESD protection circuits make the TPS71818-27YZCT suitable for use in a wide range of applications. It comes in a 8-pin WSON-8P2A package and has a maximum power dissipation of 300 mW.

Working Principle of the TPS71818-27YZCT

In order to understand the working principle of the TPS71818-27YZCT, we need to look into the internal structure of the linear voltage regulator circuit. This type of circuit consists of three main parts: the power supply, the voltage reference, and the main linear regulator. The power supply supplies power to the circuit, and the voltage reference generates a reference voltage that is used to set the output voltage of the regulator. The main linear regulator is an amplifier (often a transistor) that senses the difference between the input and output voltages and quickly adjusts the output voltage accordingly.

When the input voltage is higher than the output voltage, the linear regulator passes current from the input to the output. The voltage drops across the linear regulator vary depending on the amount of current flowing through it, and the output voltage remains constant since the difference between the input and output voltages is kept constant. When the input voltage drops below the output voltage, the linear regulator stops passing current, and the output voltage will decrease.

Application Fields of the TPS71818-27YZCT

The TPS71818-27YZCT is suitable for a wide range of applications. It can be used as a standalone voltage regulator, such as a power supply for small digital devices. It can also be used in combination with a battery charger as a system power supply. The built-in protection features make it especially suitable for mobile applications, as it can protect the system from unwanted power fluctuations caused by the battery. Lastly, it can be used in automotive and industrial applications, as well as in high-speed digital systems.

Conclusion

The TPS71818-27YZCT is a high-speed CMOS low-voltage linear voltage regulator. Its working principle is based on a linear voltage regulator circuit, which maintains a constant output voltage despite changes in the input voltage. Its wide input voltage range and built-in protections make it suitable for a variety of applications, ranging from small digital devices to automotive and industrial systems.