LP2989IM-2.5

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Texas Instruments’ LP2989IM-2.5 is a low-cost, low-voltage, high-current, high-precision linear voltage regulator which finds applications in both industrial and consumer electronics. It is designed to ensure tight output voltage regulation, even in the presence of large transients and temperature variations, and provides protection against both in-rush current and over-voltage. It is housed in an 8-pin mini-vari-pack package and offers an output current of up to 2.5A and ±1.5% load regulation for 0.5A to 2.5A outputs.

The working principle of the LP2989IM-2.5 is based on the resistor divider principle. It consists of a linear voltage regulator that uses two resistors placed in series, connected between the input and output. When a current is applied between the input and output terminals, the resistors divide the voltage, resulting in a stabilized voltage at the output terminal. This voltage can then be adjusted by changing the ratio of the two resistors. The LP2989IM-2.5 also includes a power MOSFET which switches on when the voltage on the output exceeds a certain threshold, thus preventing excessive current.

The LP2989IM-2.5 has a wide range of applications, such as digital cameras, cell phones, GPS, and PDAs. It is an ideal solution for providing protection against in-rush current, over-voltage, and transient current loads. Its ability to handle high output current and maintain high output voltage accuracy makes it suitable for battery-powered devices or handheld equipment that require tight regulation of the supply voltage.

The LP2989IM-2.5 features a thermal shut-down feature which trips and shuts down the part when the junction temperature rises above 160°C. It also includes short-circuit and under-voltage protection which helps to protect the part from damage due to excessive current or voltage conditions. The part also includes a sense pin which can be used to set the minimum output current, thus making it suitable for low-output current applications.

The LP2989IM-2.5 is the ideal voltage regulator for projects requiring precise voltage regulation and current control. Its low cost, tight voltage regulation, short-circuit protection and thermal shut-down features make it suitable for a wide range of applications in industrial and consumer electronics. It is one of the most cost-efficient and reliable voltage regulators available today.

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