REG101UA-5

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The REG101UA-5 is a linear voltage regulator, designed for various applications by Texas Instruments. This type of voltage regulator is most commonly used when an adjustable, low output voltage and/or current is required. In particular, the REG101UA-5 is usually used in applications where a voltage of up to 5V is required and the load current levels are less than 1.5A. The REG101UA-5 works by converting a higher input voltage to a lower output voltage, allowing users to supply a steady voltage to components, circuits, and other power-consuming devices.

The REG101UA-5 uses a three-terminal control which consists of an output voltage control. This terminal is internally adjusted, which means that the voltage will stay consistent as the device ages or tolerances change. The typical operating temperature of the regulator is between 70 and 125 ˚C with an output voltage accuracy of ±2V and an operating current of 3.6mA. The device also has a wide operating voltage range of 5.5V to 28V, which provides a good amount of flexibility for users when selecting an ideal power source.

The operating principle of the REG101UA-5 is based on a voltage decrease by a linear voltage regulator. The process begins with the input voltage being inputted into the regulator’s input and referenced to the ground. The input voltage is then reduced by a fixed amount, referred to as a voltage dropout, which is dependent on the output current of the regulator. This voltage dropout then acts as the voltage reference and is used to control the output voltage. The output is generated by an internal current source and is regulated according to the set reference voltage. The internal current source is regulated by controlling a P-channel transistor, which turns on or off to provide the necessary current to the output.

The device also offers several protection features, such as input over voltage and thermal protection. The input over voltage protection prevents the input voltage from going above the threshold voltage, while the thermal protection shuts the device off if it exceeds a certain temperature. This provides users with a level of safety against unexpected device failures and helps regulate device temperatures.

Overall, the REG101UA-5 is a great choice for applications requiring a constant, adjustable output voltage of up to 5V and a load current of less than 1.5A. The device is highly reliable, with a wide range of protection features, and its three-terminal regulation make it ideal for a variety of applications.

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