LP3855EMPX-ADJ

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

LP3855EMPX-ADJ is a Voltage Regulator belonging to the Linear family of PMIC (Power Management Integrated Circuit) controllers. The device is used to supply current to applications whenever it is needed in a systematic and reliable way. The LP3855EMPX-ADJ provides high current output of up to 1A and is adjustable, which enables it to control output voltage within a range of 1.5V to 5.5V. Overall, this device provides a powerful and flexible solution for applications with tight regulation and low noise.

Application Field

The LP3855EMPX-ADJ can be used in various applications such as portable devices, power supplies, and processors. It was primarily designed for high current applications such as automotive and communication systems. The device\'s variable adjustable regulator allows users to adjust the output voltage range from 1.5V to 5.5V to meet the low voltage power requirements in various applications. This ability to adjust the voltage makes it ideal for transitioning between different voltage levels in high current scenarios.

The LP3855EMPX-ADJ is also ideal for applications with soft start capabilities to limit the in-rush current at power-up. It has a safe start feature which allows it to adjust the output current level in slow steps during power-up, thereby providing a more optimized power supply.

The device also provides excellent drop-out voltage performance, thanks to its 5.5V maximum output voltage. This device can deliver a wide range of output power levels up to 1A and is also available in adjustable and fixed 5V/3.3V/2.5V/1.8V configurations. Therefore, this device is suitable for a wide range of applications that require low voltage drops, high current output, and efficient power conversion.

Working Principle

The LP3855EMPX-ADJ works on the principle of linear regulator. It is a simple yet effective circuit configuration comprising of a series of components and a voltage reference. At the core of the device is an internal voltage reference or Fixed Output Voltage (FOUT) that is used to compare the input and output voltages. Whenever the input voltage rises above the FOUT, the internal reference circuit forces the output voltage to remain at the same level. To provide a current output, a transistor is connected to the output of the regulator.

The LP3855EMPX-ADJ also contains an error amplifier along with the internal reference voltage. The amplifier monitors the input and output voltages. Its output is then connected to the gate of a series of N-MOSFETs which are used to control the output current. The output current is regulated by varying the on-resistance of the series N-MOSFETs.

By controlling the output current, the device also helps to avoid any overvoltage/overcurrent conditions. It also provides an adjustable overvoltage protection feature, which can be used to protect the device from any unwanted overvoltage conditions. It can also be used in applications where higher output current is required. The device incorporates an option for low energy dissipation mode which allows for higher efficiency and reduced power consumption for applications where a high current is not required.

Conclusion

The LP3855EMPX-ADJ is an ideal Power Management Integrated Circuit (PMIC) device for applications requiring a high current output, efficient power conversion, and low voltage drops. It is adjustable and can supply a maximum output current of up to 1A. The device utilizes an adjustable linear regulator along with a series of N-MOSFETs to regulate the output voltage. It also provides an adjustable overvoltage protection feature for enhanced protection. Overall, this device is suitable for a wide range of small and medium size applications requiring a reliable and efficient power source.

The specific data is subject to PDF, and the above content is for reference