LP3883ESX-1.2

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LP3883ESX-1.2 Application Field and Working Principle

LP3883ESX-1.2 is a High Precision, Low Noise, Low Dropout (LDO) regulator. It can provide a voltage output of 0.8V to 5.0V and enables supply currents up to 950mA. LDOs are usually used to regulate output voltages in a variety of applications which require low noise, low quiescent current, and high voltage accuracy. This LDO is well-suited for use in applications such as LED lighting, high-end transportation, and audio systems.

Features of LP3883ESX-1.2

• Ultra-Low Noise and Low Dropout Voltage: LP3883ESX-1.2 features ultra-low noise of only 50 μVRMS, helping minimize system noise for better audio and video performance. With low quiescent current of only 30 μA and dropout voltage of only 300mV at 950mA, meaning that the LP3883ESX-1.2 will remain operational longer than other LDO voltage regulators.
• High Accuracy: With an accuracy of only ±0.3%, the LP3883ESX-1.2 is well suited for use in navigation, medical, and other precision applications.
• Wide Output Voltage Range: The LP3883ESX-1.2 offers a wide output voltage range of 0.8V to 5.0V and is rated for inputs of up to 18V, enabling supply voltage variations while maintaining a low noise level.
• Thermal Regulation: The LP3883ESX-1.2 has built-in thermal regulation to protect against excessive temperatures.

Working Principle of LP3883ESX-1.2

The LP3883ESX-1.2 operates by using two main components: a voltage reference and an error comparator. The voltage reference sets the desired output voltage, which the error comparator monitors. When the input voltage goes above the desired output voltage, the error comparator will trip and reduce the supply current to maintain the correct voltage.

The LP3883ESX-1.2 also utilizes an N-MOSFET gate driver, which turns the N-MOSFET gate on and off to increase or decrease the output voltage. When the input voltage is higher than the output voltage, the gate driver increases the gate voltage to decrease the output voltage. When the input voltage is lower than the output voltage, the gate driver decreases the gate voltage to increase the output voltage. The LP3883ESX-1.2 also features thermal regulation, which prevents the output voltage from decreasing or increasing due to excessive temperatures.

Conclusion

LP3883ESX-1.2 is an excellent solution for applications that require high voltage accuracy and ultra-low noise. With a wide output voltage range, low quiescent current and low dropout voltage, the LP3883ESX-1.2 is a perfect choice for applications such as LED lighting, high-end transportation, and audio systems. Finally, with its built-in thermal regulation and error comparator, the LP3883ESX-1.2 is well suited for use in navigation, medical, and other precision applications.

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