L4931CZ50

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L4931CZ50 is a three terminal, low drop-out linear regulator ideal for use in portable and other low power applications requiring a supply current of up to 200mA.

The device consists of a voltage reference, an error amplifier and a P-Channel MOSFET pass element. It is an adjustment free, fixed output voltage regulator, providing current over temperature protection and thermal shutdown. This device is based on the classical linear regulator architecture, so it is also very reliable in comparison with other voltage regulators.

Application field

L4931CZ50 is used for low power applications such as cell phones, PCs, and tablets. It is designed to be powered from the battery in order to ensure longer battery life. It is very popular in motors and other equipment to stabilize them. The device is especially useful in applications that require low input voltage and high output voltage or in low voltage battery operated motor-control systems.

Working Principle

The L4931CZ50 works by controlling the voltage of an input power source using feedback from an output voltage. This device is designed to maintain a constant output voltage until the input voltage changes. The regulator works by comparing the input and output voltages. When the output voltage drops, the error amplifier increases the voltage on the base of the P-channel MOSFET, causing it to conduct more current. This increases the output voltage, allowing the device to maintain a constant output voltage.

When the output voltage increases, the error amplifier decreases the voltage on the base of the P-channel MOSFET, causing it to conduct less current. This decreases the output voltage, again allowing the device to maintain a constant output voltage.The current limit of the device is determined by the external resistors. The device can regulate output voltages up to 7.5V.

The main advantage of the L4931CZ50 is the very low drop out voltage, which is the voltage difference between the input voltage and the output voltage. The low drop out voltage ensures the output voltage remains closely regulated, even when the input voltage is close to the output voltage. The low power dissipation also ensures long battery life.

Conclusion

The L4931CZ50 is an excellent choice for low power applications. It offers very low drop out voltage, current limit, and thermal protection. This device is highly efficient and very reliable in comparison with other voltage regulators. It is ideal for applications that require low input voltage and high output voltage and can be used in many devices such as cell phones, PCs and tablets. The L4931CZ50 is the ideal device for stable voltage regulation.

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