LDS3985M28R

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Linear Voltage Regulators – LDS3985M28R Application Field and Working Principle

Linear Voltage Regulators are electronic circuits that are used to regulate electric voltage, generally transforming a variable voltage into a more stable and reliable voltage. A voltage regulator is an example of a typical linear voltage regulator, and the LDS3985M28R is one such example. This article will discuss the application field and working principle of the LDS3985M28R Voltage Regulator.

The LDS3985M28R is a three-terminal adjustable positive linear voltage regulator designed for positive-to-negative voltage conversion from input voltage supplies ranging from 4.5V to 40V. The adjustable output range is between 1.2V and 40V. It is primarily suitable for voltage sources up to 40V and applications with relatively high power demands. It is well suited for both high-current, medium-voltage and a multitude of low-power applications.

The LDS3985M28R is featured with a wide input voltage range and a very low dropout voltage. It is capable of operating at current values up to 12A and temperature range from -40°C to +125°C. It is a bipolar device with excellent thermal performance, making it particularly well-suited for automotive applications. It also features a very low quiescent current, which makes it more suitable for battery powered devices.

The working principle of the LDS3985M28R linear voltage regulator is as follows. All voltage regulators consist of an output stage which is responsible for controlling the output voltage. In the case of the LDS3985M28R, this output stage relies on an error amplifier and an output transistor. The error amplifier monitors the output voltage and will adjust the output voltage when it is out of range. It does this by increasing or decreasing the current passing through the output transistor accordingly. The capacitors around the output stage help to reduce the amount of noise in the output voltage. The current limit Circuit in the LDS3985M28R provides protection against high in-rush current and over current conditions.

Other than its application in automotive, the LDS3985M28R Linear Voltage Regulator is also suitable for a wide range of applications such as communication systems, computer peripheral devices, automotive systems and various industrial applications. Its features make it particularly well suited for battery-powered applications, as its low quiescent current also allows for longer battery life.

In conclusion, the LDS3985M28R Linear Voltage Regulator is a three-terminal adjustable positive linear regulator suitable for positive-to-negative voltage conversion from input voltage supplies between 4.5V and 40V, with adjustable output range of 1.2V to 40V. It is ideal for both high-current, medium-voltage and low-power applications, and its features make it suitable for a variety of applications, including automotive, communication systems, and battery-powered devices.

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