LP3872ESX-1.8

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

PMIC (power management integrated circuit) refer to the circuit design that can manage the energy of an electronic system. A type of PMIC is the Voltage Regulators, which is a device that can take a particular input voltage and convert it into a regulated output voltage. Linear Voltage Regulators (or simply “linear regulators”) are the most popular and widely used voltage regulators. The LP3872ESX-1.8 is a low dropout (LDO) linear regulator that is used to regulate voltage levels in a wide range of applications.

Applications

The LP3872ESX-1.8 is designed to regulate voltages in a wide range of consumer, industrial, and automotive applications. Some of the more common applications in which the LP3872ESX-1.8 is used are: notebook computers, digital cameras, cell phones, and automotive accessories. Additionally, it can be used as a step-up voltage regulator in solar power systems and other renewable energy systems.

The LP3872ESX-1.8 has a low dropout voltage of 1.8V, making it ideal for applications that require a low supply voltage. The low dropout voltage ensures that the regulator can maintain a stable output voltage even when the input voltage drops. Additionally, the LP3872ESX-1.8 provides over-current, overtemperature, and under-voltage protection, making it ideal for applications with varying input voltages, temperatures, and current requirements.

The LP3872ESX-1.8 is also suitable for current-sensing applications due to its high accuracy over a wide temperature range. The current offset and gain are adjustable via external resistors, allowing the user to fine-tune the output current sensing. This feature makes the LP3872ESX-1.8 ideal for applications requiring precise current measurement.

Working Principle

The working principle of Linear Voltage Regulators, such as the LP3872ESX-1.8, is very straightforward and simple. The regulator is composed of four basic components: an operational amplifier, a reference voltage source, two power transistors, and an output transformer. The reference voltage source is used as the voltage reference and the operational amplifier amplifies the difference between the reference voltage and the input voltage. The output of the amplifier is fed to the two power transistors, which work together to switch the output voltage of the regulator.

When the input voltage is equal to the reference voltage, the power transistors remain off, and there is no current through the output transformer. When the input voltage is higher than the reference voltage, the power transistors turn on and current flows through the output transformer. The output voltage is regulated by the current through the output transformer, and the output voltage can be controlled by adjusting the reference voltage or the gain of the amplifier. The LP3872ESX-1.8 can also be configured for current sensing applications by utilizing the adjustable offset and gain.

Conclusion

The LP3872ESX-1.8 is a low dropout (LDO) linear regulator that is used to regulate voltage levels in a wide range of applications. It offers low dropout voltage, over-current, overtemperature, and under-voltage protection, making it suitable for a variety of applications. It can also be used in current-sensing applications due to its adjustable offset and gain. The working principle of the LP3872ESX-1.8 is based on a reference voltage source, an operational amplifier, two power transistors, and an output transformer.

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