AP7381-33V-A

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AP7381-33V-A is a kind of linear voltage regulator that is mainly used in consumer, industrial, and mobile applications. Generally, it is applied in a 3.3V output voltage circuit. It product high power even with minimal loss, makes application of the AP7381-33V-A more efficient and cost-effective.

AP7381-33V-A is a one-block 3.3V linear voltage regulator which is suitable for applications where output voltage is 3.3V. It works with a Dropout Voltage of 1.05V and a maximum output current of 800 mA. The device provides stable operation at output voltages of 3.3V and is specified for Power Dissipation of up to 800 mA. The device also works with minimal quiescent current (Iq) of just 10mA on average, making the device suitable for applications where power savings are important.

AP7381-33V-A is a low-dropout (LDO) linear voltage regulator. Its working principle is to use a reference voltage, connected to its OUT pin, to establish a known voltage, typically 5V, at its IN pin. The difference between the two voltage is sent to an error amplifier whose output is fed to a pass element, usually a BJT or MOSFET, connected between the OUT and IN pins. The pass element is the linear regulator, and the amount of current through it is the correction signal of the regulator.

The circuit shown in Figure 1 shows the basic working principle of AP7381-33V-A. In Figure 1, the input voltage (Vin) is regulated (Vout) by the control loop features, including the error amplifier, voltage reference and the pass element.

The error amplifier compares the input and output voltages and bases its response on the amount of error. It is designed to effectively compare two voltages and produce an output current which is proportional to the error between them. After the amplifier amplifies the error, it is then sent to the pass element to ensure that the voltage regulation loop is active. The pass element passes the current control signal to the output, which controls the output voltage.

The voltage reference provides a stable reference voltage which controls the output voltage. Its reference voltage determines the accuracy of the output voltage. The reference in AP7381-33V-A is set to 3.3V which is the nominal voltage of the device.

AP7381-33V-A has good features that enable high power output. These include a high output current (Iout) of up to 800 mA and a low dropout voltage of just 1.05V. It also has a wide operating temperature range of -40°C to +85°C and is suitable for a wide range of applications. Its thermal characteristics are also excellent: The junction-to-ambient thermal resistance is just 3°C/W.

In conclusion, AP7381-33V-A is an effective and cost-efficient linear voltage regulator for applications in consumer, industrial and mobile applications. It features a low dropout voltage of just 1.05V, high output current of up to 800 mA, wide operating temperature range of -40°C to +85°C, and a junction-to-ambient thermal resistance of just 3°C/W. These features make the AP7381-33V-A a highly efficient and reliable linear voltage regulator for various applications.

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