PQ12RD21

Linear voltage regulators are analog electronic components, commonly found in modern electronic systems, that have the duty of maintaining a constant voltage. Today’s linear voltage regulators are usually configured using a PMIC – or power management integrated circuit – such as the PQ12RD21. This PMIC, in particular, is designed to convert input AC/DC power to a regulated output voltage. Its integrated circuit generally consists of three main elements, each of which is described below.

Transformer: The transformer element changes the input AC/DC power to a regulated voltage. This is done by providing enough voltage at the output to ensure that it stays stable and the output voltage is constant. It is important to note that the transformer should be set up so that the output voltage matches the required voltage for the device. In the case of the PQ12RD21, this can either be a 3.3V or a 5V output.

Controller: The controller is responsible for controlling the linear voltage regulator. It is controlled by two factors: The amount of voltage that is fed from the input, and the voltage already present at the output. The controller is programmed to maintain the output voltage by either increasing or decreasing the output voltage depending on the input voltage. If the input voltage is higher than the output voltage, the controller will increase it; if the input voltage is lower than the output voltage, the controller will decrease it.

Output transistor: The output transistor is responsible for regulating the output voltage. It does this by controlling the amount of current that flows through it. In the case of the PQ12RD21, it is capable of delivering up to 1.5A output current, which makes it suitable for powering low current applications.

In conclusion, the PQ12RD21 is a PMIC designed to regulate input AC/DC power to a predetermined output voltage. It generally consists of three elements: A transformer to convert the input voltage, a controller to maintain the output voltage, and an output transistor to determine the amount of current delivered to the output. With its ability to deliver up to 1.5A output current, the PQ12RD21 is perfect for powering low current applications.