LM78L12ACMX/NOPB

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LM78L12ACMX/NOPB Application field and Working Principle

The LM78L12ACMX/NOPB (Low Dropout 12V Voltage Regulators with Enhanced Stabilization System) is a special type of Positive-Voltage Regulator that belongs to the Linear category in Power Management Integrated Circuits (PMIC). It is often used in applications requiring precise output voltage and current regulation, such as in laptop, personal computer and industrial equipment where smooth and reliable power management is needed. The LM78L12ACMX/NOPB offers excellent power-supply regulation, low dropout voltage, fast response time, excellent transient response, and low temperature operating performance.

Application Field

The LM78L12ACMX/NOPB is a highly versatile voltage regulator that can be used in a variety of applications such as in computers, cell phones, and general electronic equipment. This regulator can be used to power an array of products, ranging from video cards and motherboards to medical equipment and portable devices. It is commonly used in laptop computers, personal computers, and industrial equipment that require precise voltage and current regulation.

The LM78L12ACMX/NOPB is also well-suited for automotive applications, where it is used in engine control and audio systems. It can also be used in high-temperature environments such as in tire pressure monitors and diesel engines. This regulator can provide temperatures as high as 185 degrees Celsius.

Working Principle

The LM78L12ACMX/NOPB is a three-terminal positive voltage regulator that can deliver 12V output voltage at maximum output current of 1.5 A, and is designed to operate at a nominal temperature range of -40 to +185°C. This regulator utilizes analyses power management system which offers very low dropout voltage and works by sensing the input voltage and creating voltage regulation by using dynamic and static biasing networks. The dynamic biasing network consists of two MOS transistors that are connected in series between the input voltage (Vin) and ground. The Static biasing network consists of two voltage dividers, one of which is located at the Vref (reference voltage) terminal and the other at the output (Vout).

The LM78L12ACMX/NOPB is designed to operate with input voltage ranging from 3 to 22V, output voltage from 11 to 12V and output current from 0.5 to 1.5A, depending on the input voltage, output voltage, and the ambient temperature. Its regulation voltage accuracy is ±2%, thus ensuring a constant output voltage even when the input voltage fluctuates. The output voltage is also protected against current surges as the regulator will shut down if the current exceeds its maximum rated 1.5 A. The LM78L12ACMX/NOPB also features over-temperature protection; the regulator will shut down if the junction temperature reaches a certain threshold.

Conclusion

The LM78L12ACMX/NOPB is a very useful voltage regulator that can be used in a variety of applications. Its excellent power-supply regulation, low dropout voltage, fast response time, excellent transient response and low temperature operating performance make it an ideal choice for applications requiring precise output voltage and current regulation. Its dynamic and static biasing networks ensure proper voltage regulation, while the over-temperature protection ensures that no damage will occur under extreme conditions.

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