LP3855ET-2.5/NOPB

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LP3855ET-2.5/NOPB Application Field and Working Principle

Linear voltage regulators are widely used and have been around for many years. They are designed to be reliable and energy efficient, reducing power supply line noise and eliminating ultraviolet light interference. The LP3855ET-2.5/NOPB is a low-dropout linear voltage regulator from Texas Instruments (TI) specifically designed to provide a low-noise and low-cost power supply solution for portable and battery operated electronic devices.

The LP3855ET-2.5/NOPB is an adjustable, low-dropout linear voltage regulator that can deliver up to 500mA of output current. It has an adjustable output voltage range of 1.26V to 10V. The device also includes an internal error amplifier and provides thermal shutdown protection. It is available in a small 9-pin thin (UT) shrink small outline package (TSOP).

Application Field

The LP3855ET-2.5/NOPB is a versatile voltage regulator suitable for use in many applications. It can be used in various battery operated and portable electronic devices, such as cellular phones, digital cameras, PDAs, MP3 players and other handheld devices.

The LP3855ET-2.5/NOPB can also be used for powering light-emitting diodes (LEDs), powering DSPs and micro-controllers, providing bias or reference voltages and for backlighting in LCD displays.

Working Principle

The LP3855ET-2.5/NOPB is a low-dropout linear voltage regulator that works on the principle of a voltage divider. It works by using a series of resistors to reduce the output voltage of a power supply to the desired level. The output voltage of the device is adjusted using a feedback loop that senses the output voltage and adjusts the resistance to maintain the desired output voltage.

The LP3855ET-2.5/NOPB includes an internal error amplifier and a feedback resistive divider to sense and adjust the output voltage. The output voltage is given by the equation: Vout = Vref * (1 + Rf/Rg), where Vref is an internal reference voltage, Rf is a feedback resistor and Rg is an external resistor.

The error amplifier monitors the output voltage and compensates for any variations in the output voltage. The output voltage can be adjusted by varying the feedback resistance, or by adjusting the reference voltage. The device also provides thermal shutdown protection, which will keep the device from operating at high temperatures.

Advantages of LP3855ET-2.5/NOPB

The LP3855ET-2.5/NOPB has several advantages over other linear voltage regulators. It offers low noise and low cost, making it an ideal solution for portable and battery operated electronic devices. The device is also low-dropout, allowing it to work efficiently at very low input voltages. The device also includes an internal error amplifier, which keeps the output voltage stable and protects the device from becoming over-heated.

The LP3855ET-2.5/NOPB also has a wide operating temperature range, making it suitable for a variety of applications. The device is also small in size, making it easy to integrate into a variety of designs. Finally, the device can deliver up to 500mA of output current and has an adjustable output voltage range of 1.26V to 10V, making it suitable for many different needs.

Conclusion

The LP3855ET-2.5/NOPB is a low-dropout linear voltage regulator from TI specifically designed to provide a low-noise and low-cost power supply solution for portable and battery operated electronic devices. It is suitable for use in various battery operated and portable electronic devices, such as cellular phones, digital cameras, PDAs, MP3 players and other handheld devices. The device has several advantages over other linear voltage regulators, including low noise, low cost, low-dropout operation, an internal error amplifier, wide operating temperature range, small size, and up to 500mA output current at an adjustable 1.26V to 10V output voltage range.

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