MC7812ECTBU

Current - Output:	1A
Base Part Number:	MC7812
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	71dB (120Hz)
Current - Quiescent (Iq):	8mA
Series:	--
Voltage Dropout (Max):	2V @ 1A (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Bulk

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IntroductionThe MC7812ECTBU (MC7812) is a three-terminal linear voltage regulator that is part of NXP Semiconductors’ family of linear voltage regulators. It features an output voltage of 12V in a TO-220 format, with an instantaneous current of 1A and takes on a noise-free low dropout regulation in low current applications. This device is an ideal choice for a variety of embedded applications such as automotive, industrial, broadcast, and home use. Owing to its low on-state resistance and fast transient response, the MC7812 stands out as an ideal choice for applications where noise and space requirements are typical concerns. Application FieldThe MC7812 can be used in a variety of linear voltage regulator applications such as HVAC (heating, ventilation, and air conditioning) control, backup systems, white goods, communications, solar panel inverter control, power supplies, UPS’s (uninterrupted power supplies), and a variety of other embedded systems. The device also features a fast transient response, high accuracy, and little power consumption, providing a step-down voltage for 12V load circuits, or the direct measurement of voltage values in the range of 0.5V to 1V voltages.When used in a variety of embedded applications, the MC7812 can provide a safe and secure output voltage with its overvoltage protection and thermal shutdown capabilities, guarding against undesired power transients and thermal conditions. This makes it perfect for use in automotive, industrial, communication, and HVAC applications, as well as other applications where accuracy, short response times and safety is required. The MC7812 - Low Dropout Linear Voltage Regulator also offers small case size, low standby current and low on-state resistance. This makes the MC7812 an ideal option for automotive, industrial, broadcast, and home applications. The low likelihood of noise and sound limitations, alsomakes this device an ideal choice for applications where space and noise is typical a concern. Finally, due to its small footprint, the MC7812 allows for better utilization of space, allowing for greater integration and simplification of designs.Working PrincipleThe MC7812 functions as a three-terminal linear device, providing a fixed-voltage and constant current sink. The basic workings of this device can be broken down into three distinct parts: First is the reference voltage, which sets the base for the output voltage and current. This reference is established by an internal Voltage Divider Network consisting of two resistors that ingest a portion of the input voltage, and output a reference voltage to the Regulated Output Stage.Second is the Sense and Control Amplifier, which measures and compares the reference voltage to the output voltage, making sure that a deviation from the set point does not occur. The amplifier amplifies the difference between the two signals and sends the signal to the Regulated Output Stage.Finally, the Regulated Output Stage uses the signal from the Sense and Control Amplifier and output the corrected signal to the output. This stage also provides current limiting, enabling the device to run under current overload conditions. With this three-stage process, the MC7812 is able to correct any deviation from the set point, enabling noise-free operation, low dropout regulation, and an accurate and stable output voltage. ConclusionIn conclusion, the NXP Semiconductor\'s MC7812ECTBU (MC7812) is an ideal component for a variety of linear voltage regulator applications in home, automotive, industrial and broadcast applications. The MC7812 offers an output voltage of 12V in a TO-220 package, with an instantaneous current of 1A and takes on a noise-free low dropout regulation for low current applications. This device features a fast response time, low on-state resistance, small case size and low standby current, providing accuracy and safety for your circuit. With its three-terminal linear device process, the MC7812 is able to provide an accurate and stable output voltage with low noise, low dropout regulation, and reliable current limiting.

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