LP38842T-0.8

LP38842T-0.8 Application Field and Working Principle

LP38842T-0.8 is a type of linear voltage regulator integrated circuit (IC). It is a three-pin voltage regulator with a fixed output voltage of 0.8V, capable of supplying an output current of up to 500mA.

Application Field

In various power supply design projects, LP38842T-0.8 is widely used due its low quiescent current, low operating voltage and its high output current capability. It can be used to regulate current or voltage in a variety of devices. It can also be used to reduce an input voltage to a lower output voltage. Additionally, the device can also be used to generate a negative voltage from a positive input voltage.

The LP38842T-0.8 voltage regulator is used in applications such as microprocessors, converters, and LCD display drivers. It is used in power subsystems for mobile and embedded designs such as cell phones, digital cameras, and tablets. It is also found in many applications that require precision power regulation, such as gaming and audio. Additionally, it can also be used in automotive applications where low on resistance is critical.

Working Principle

LP38842T-0.8 is a monolithic, low voltage linear voltage regulator IC. It uses the same schematic circuit used in a standard Zener diode and transistor-based regulator. This IC consists of three pins: VIN (input voltage), GND (ground) and VOUT (output voltage). The input voltage is applied to the VIN pin while the output voltage is available at the VOUT pin. The output voltage is regulated by the insertion of a Zener diode between the input voltage and GND. The Zener diode regulates the current through the device, allowing for precise control of the output voltage.

The IC also employs a voltage divider network to control the output voltage. This network consists of two resistors, one from the input to the output, and the other from the output to ground. When the output voltage is set to 0.8V, the voltage divider network sets the voltage at the VOUT terminal to 0.8V. The Zener diode provides a stabilized voltage at the VOUT terminal, ensuring that the output voltage does not exceed this safety limit.

LP38842T-0.8 also employs power protection circuitry. This circuitry limits the output current of the device, ensuring that it does not exceed its rated output current of 500mA. This protection feature ensures that the device is protected from external over-current conditions.

Conclusion

LP38842T-0.8 is a low-voltage linear regulator IC capable of providing a regulated 0.8V output voltage. It is widely used in various power supply design projects due to its low quiescent current, low operating voltage and its high output current capability. It is often found in various applications that require precision power regulation. Additionally, its power protection circuitry helps to ensure that it remains protected from external over-current conditions.