MC78L05ABDG

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MC78L05ABDG, a voltage regulator, belongs to the linear voltage regulator family. It is a three-terminal fixed output voltage device designed primarily to provide a well regulated output voltage with high accuracy and low noise. Its output is stable over a wide range of input voltage, temperature, and load conditions. It is able to operate from up to 25V DC input with an output current up to 100mA.

The MC78L05ABDG is an internally compensated voltage regulator, which offers excellent line and load regulation with very low output noise. It is specifically designed for use in LCD backlight and other high current applications. It also has an over-current limiter for additional protection of the system components. The MC78L05ABDG is available in TO-220 and SOT-89 packages.

MC78L05ABDG Application

The MC78L05ABDG is ideal for use in DC/DC converters, LCD backlight, and other high current applications. It is also suitable for general purpose voltage regulation of microprocessor systems and other non-critical applications. It is able to operate in a wide temperature range, from -40°C to +85°C. The MC78L05ABDG is capable of providing high output current and stable operation under heavy load conditions.

The MC78L05ABDG can be used to regulate the output voltage of a buck converter, as shown in the figure below. The figure also shows how the MC78L05ABDG can be used as a supervisor in a microprocessor-based system to monitor the power supply and provide over-voltage and over-current protection.

MC78L05ABDG Working Principle

The MC78L05ABDG is a three-terminal, monolithic IC voltage regulator. It is constructed using advanced Bipolar-Technology. The device contains an adjustable error amplifier, which allows the user to adjust the output voltage to the desired level. The MC78L05ABDG is internally protected from over-current and over-temperature conditions.

The output of the IC is stabilized by a power control device. It has a constant voltage regulator, which ensures that the output voltage is maintained across the full range of load current and line voltage. The power control device also provides over-current and over-temperature protection by shutting down the output of the IC when the current or temperature exceeds a certain threshold.

The MC78L05ABDG is designed with low dropout voltage, which means that a small input-output voltage differential is required to maintain the required output voltage. This feature allows the device to be used in applications where the input voltage is close to the output voltage. The device also has a low power dissipation, which make it suitable for use in battery-powered applications.

The MC78L05ABDG is available with a selection of fixed output voltages ranging from 2.5V to 12V. The device also comes with a “Shutdown” signal input, which allows the user to turn off the output voltage without disconnecting the supply voltage. This feature makes it suitable for use in applications where power saving is critical.

Conclusion

The MC78L05ABDG is a three-terminal, monolithic linear voltage regulator, which offers excellent performance in a wide range of applications. It has a wide input voltage range, low dropout voltage, low power dissipation, high output current and a shutdown signal input. The device is also internally protected from over-current and over-temperature conditions. It is suitable for use in DC/DC converters, LCD backlight and other high current applications.

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