MC79M12BDTG

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MC79M12BDTG belongs to a monolithic positive voltage regulator of PMIC - Voltage Regulators - Linear. It is capable of providing up to 1A of output current with 1.2V to 16V output voltage range and is designed to supply power to energy-hungry devices. It offers excellent performance, including low dropout voltage, good load and line regulation, and low total output noise.

Applications

The MC79M12BDTG is ideal for applications that require fast transient response and high ripple rejection such as LED lighting, industrial automation, robotics and embedded systems. It is also suitable for power management in medical, consumer and automotive electronics and for powering LCD backlight displays.

General Description

The MC79M12BDTG is a monolithic positive voltage regulator that provides a steady output voltage of 1.2V to 16V, depending on the dropout voltage, for applications that require fast transient response and high ripple rejection. It is capable of providing up to 1A of output current with a dropout voltage of 1V or less and a maximum output voltage of 16V. The regulator is designed to be operated from an input voltage range of 3V to 36V, making it suitable for powering a wide range of devices.

The MC79M12BDTG features excellent performance, including low dropout voltage, good load and line regulation, and low total output noise. It also offers thermal protection and allows for adjustable output voltage ranging from 1.2V to 16V. The device is available in a TO-263 (D2-PAK) package that is lead-free and RoHS compliant.

Features

• Input voltage range: 3V to 36V
• Output voltage range: 1.2V to 16V
• Dropout voltage: 1V max.
• Output current: 1A
• Load regulation: 0.2%
• Line regulation: 0.2%
• Thermal protection
• RoHS compliant
• Lead-free
• Package: TO-263 (D2-PAK)

Working Principle

The MC79M12BDTG regulator operates as a voltage regulator by controlling the base current of a feedback transistor. This transistor is connected as an emitter follower so its collector current is almost equal to its base current, thus regulating the output voltage. The transistor is controlled by a voltage reference (Vref) connected to the base. If the output voltage increases, then the voltage on the base of the transistor is increased and the current is decreased, thus decreasing the output voltage.

The voltage reference is typically set to 1.2V (1V nominal) so that when the output voltage is 1.2V, the base current is at its maximum. As the output voltage increases, the base current is reduced, thus decreasing the voltage on the collector of the transistor. This process continues until the output voltage is regulated at the desired value. The regulator also features over-current protection, so that if the load current exceeds the maximum output current, the regulator’s current limiting feature will reduce the output current.

Conclusion

The MC79M12BDTG is a monolithic positive voltage regulator that provides a steady output voltage of 1.2V to 16V, depending on the dropout voltage, for applications that require fast transient response and high ripple rejection. It is capable of providing up to 1A of output current with a dropout voltage of 1V or less and a maximum output voltage of 16V, and is RoHS compliant. The device offers excellent performance and is especially suitable for LED lighting, industrial automation, robotics and embedded systems.

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