LP3985IBP-2.8

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PMIC (Power Management Integrated Circuits) are designed to convert, regulate and monitor the power circuitry of a circuit. Voltage Regulators are a core part of this family of semiconductor integrated circuits and Linear Voltage Regulators are designed to provide that linear supply of accurately regulated electrical energy from a source to the load. One such example of a Linear Voltage Regulator is the LP3985IBP-2.8.

Overview of LP3985IBP-2.8

The LP3985IBP-2.8 is an adjustable linear voltage regulator that is specifically designed for automotive and industrial applications. It is available in a wide variety of packages such as SO8W, SOT223, CDG, and DPAK. It features an adjustable output current limit and high power transient surge protection. It also has a low dropout voltage of only 1.5V. The LP3985IBP-2.8 is capable of dissipating heat up to 2.8W in free air at an ambient temperature of 25 ℃.

LP3985IBP-2.8 Application Field

The LP3985IBP-2.8 can be found in a variety of fields such as automotive, industrial, communications, and medical applications. Its high power capabilities make it suitable for use in automotive power systems, such as those found in GPS systems, cameras, and lighting. It can also be used in industrial power supply applications, such as in solar power inverters, power supply systems, and battery chargers. Additionally, its low dropout voltage of 1.5V makes it suitable for use in communications applications, such as in mobile phones, wireless headsets, and wireless Routers.

LP3985IBP-2.8 Working Principle

The LP3985IBP-2.8 Linear Voltage Regulator works on the principle of voltage regulation and current limitation. The input voltage is fed into the regulator and the output voltage is controlled by the adjustment pin. The regulator uses a resistor to sense the output voltage and adjust the current according to the voltage level. If the current exceeds the preset limit, the output voltage is clamped and the output current is limited. This prevents the system from getting overloaded and keeps the circuit protected in case of short circuits.

There are two main methods used by the LP3985IBP-2.8 to adjust the output voltage - Fixed Output Voltage Regulation or Adjustable Output Voltage Regulation. In Fixed Output Voltage Regulation, the output voltage is pre-set and cannot be adjusted. In Adjustable Output Voltage Regulation, the output voltage can be set and adjusted by changing the value of the resistor. The value of the resistor is typically changed with a trim pot or digital potentiometer.

The LP3985IBP-2.8 also offers auto-restart and under/overvoltage protection features. The auto-restart feature monitors the output and if the output drops below a certain level, it will restart the output automatically. The under/overvoltage protection feature monitors the input voltage and cuts off the output if the voltage exceeds a preset level. This helps to protect the system from unexpected voltage surges.

Conclusion

The LP3985IBP-2.8 Linear Voltage Regulator is a highly efficient, low power and adjustable Voltage regulator. Its wide range of applications, such as automotive, industrial, communications and medical, makes it suitable for a wide range of applications. It also has an adjustable output current limit and auto restart as well as under/overvoltage protection capabilities which make it ideal for a wide range of power systems. Its low dropout voltage of only 1.5V makes it suitable for use in communications applications, such as mobile phones, wireless headsets and wireless routers.

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