LM1086ISX-ADJ/NOPB

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Linear voltage regulators are devices designed to provide a constant, precise output voltage in response to fluctuating input voltage. The LM1086ISX-ADJ/NOPB is a three-terminal adjustable output low dropout regulator that operates from an input voltage of up to 28V. It employs internal current limiting and thermal over-temperature protection that makes it extremely robust and suitable for a wide range of applications.

Applications

The LM1086ISX-ADJ/NOPB is widely used in a variety of markets and applications. This device is suitable for use in cost sensitive and thermally challenging automotive, battery powered systems, LED driver, DC-DC conversions, telecom, industrial, general regulated supplies, and avionics applications.

The LM1086ISX-ADJ/NOPB is commonly used to provide clean power regulation in general purpose applications, such as in automotive and battery operated devices, telecommunication systems, computer systems, integrated circuits, and memory chips.

The adjustable current limit protection feature and wide input voltage range make the LM1086ISX-ADJ/NOPB ideal for use in industrial and avionic applications that require reliable current control. In addition, its low dropout voltage allows for efficient and effective power conversion, making it a great choice for battery-operated systems and DC-DC converter applications.

Working Principle

The LM1086ISX-ADJ/NOPB is a three-terminal adjustable Low Dropout (LDO) voltage regulator. It consists of a reference voltage source and two transistors, a Darlington pair composed internally of a PNP-like collector-base voltage feedback circuit, connected to the input terminal.

The circuit operates as follows: When the output voltage is set via an external resistor, the voltage across the Darlington pair is sensed by the reference voltage source. This will cause the current flowing into the output terminal to increase or decrease, thus causing the output voltage to match the reference voltage. As the input voltage source changes, the Darlington pair adjusts the output voltage accordingly.

In addition, the LM1086ISX-ADJ/NOPB has an adjustable current limit protection feature. It is designed to prevent output current from exceeding a predetermined level. When the current reaches the set limit, the device will shut down and the output voltage will drop to zero. The current limit can be adjusted through an external resistor.

An output overvoltage crowbar protection circuit is also integrated into the LM1086ISX-ADJ/NOPB. In the event of an output overvoltage, this protection circuit will switch off the device and the output voltage will drop to zero. The overvoltage protection circuit is designed to prevent the device from continuing to operate under overvoltage conditions that could cause permanent damage.

The LM1086ISX-ADJ/NOPB includes a thermal shut down protection feature, which will activate if the junction temperature exceeds a rated value. When this occurs, the device shuts down and the output voltage drops to zero. This feature helps to protect the device from thermal damage due to excessive power dissipation.

The LM1086ISX-ADJ/NOPB is also designed with power good and disconnect features which can be enabled through external resistors. The power good feature allows the user to monitor the output voltage level, while the disconnect feature allows the user to disable the output when needed.

The LM1086ISX-ADJ/NOPB is capable of delivering up to 8.5A of continuous output at current levels up to the set limit, and up to 20A of peak current. It is designed to operate with a wide input voltage range of 4.5V to 28V, and can deliver an output voltage range of 1.2V to 24V.

The LM1086ISX-ADJ/NOPB is RoHS compliant, and available in a 16-pin SOP-8 package. It is designed to meet AEC-Q100 and MIL-STD-883 requirements for high temperature operation in automotive and industrial applications.

The LM1086ISX-ADJ/NOPB is a robust, cost- effective, and efficient linear voltage regulator that offers high performance, density, and reliability for a variety of applications. It provides an adjustable output voltage, current limit protection, power good/disconnect features, and thermal shut down, making it an excellent choice for cost sensitive, thermally challenging applications.

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