LP2981A-28DBVT

LP2981A-28DBVT Overview

The LP2981A-28DBVT has a wide input voltage range of 2.7V to 28V and includes a shut down feature to reduce power consumption when the system is inactive. This linear voltage regulator is able to provide currents up to 500mA and is available in a 4-pin TSOT package. The output voltage has an accuracy of ±2% and is adjustable with an external resistor. It also features thermal shutdown protection with hysteresis and over-voltage protection.

LP2981A-28DBVT ApplicationFields

The LP2981A-28DBVT is ideal for use in battery-powered applications where space is limited, such as vehicle navigation systems and portable medical instruments. It can also be used in power supply designs for standard 3.3V and 5V systems, as well as providing regulated power for hot plugging backup transient conditions.

LP2981A-28DBVT Working Principle

The LP2981A-28DBVT operates on a linear regulation principle, with a volt-ampere-regulated shunting load responsible for the load regulation necessary to maintain a constant output voltage. The LP2981A-28DBVT includes a thermal shutdown functionality, which limits the current draw of the regulator when the junction temperature reaches a pre-set internal limit. This helps to prevent damage due to overheating and maintain the reliability of the regulator. The over-voltage protection feature monitors both the output voltage and the input voltage and will shut down the device if either of these exceed their pre-set values.

Summary

The LP2981A-28DBVT linear voltage regulator is suitable for use in a variety of space-limited applications, including vehicle navigation systems, portable medical instruments and power supply designs for standard 3.3V and 5V systems. It includes several advanced features such as thermal shutdown protection, hysteresis, over-voltage protection and dynamic load regulation. It is available in a 4-pin TSOT package and offers a wide input voltage range of 2.7V to 28V and currents up to 500mA.