LM7812CT

Current - Output:	1A
Base Part Number:	LM7812
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Part Status:	Obsolete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:	Tube

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Introduction

PMIC (Power Management Integrated Circuit) is an important sector of integrated circuit (IC) technology, which is responsible for regulating the voltage in a system. Voltage is one of the key parameters that determine the performance and lifespan of an electronic system, and the proper selection and implementation of a PMIC is critical to successful design. One of the most common type of PMICs is a voltage regulator, which controls the voltage to an optimal level in response to a system’s changing conditions. The LM7812CT is a type of linear voltage regulator that is widely used in many applications. In this article, we will discuss the application field and working principle of the LM7812CT.

Application Field of the LM7812CT

The LM7812CT is a three-terminal voltage regulator from the LM78XX series of integrated circuits that is used to provide a regulated voltage output of +12V. It is widely used in power supply circuits for providing stability and for protecting the ICs from transient overvoltages. It is also used in various consumer electronic products such as smartphones, tablets, laptops and more. The LM7812CT has a wide range of applications and can be used for anything from powering microcontrollers to powering operation amplifiers (OPAMPs).The LM7812CT has a high power rating and can be used both in linear and switching regulator designs. It is able to provide up to 1.2A of output current with a maximum voltage drop of 0.6V, making it ideal for low-voltage, low-current applications. The LM7812CT also has a wide input voltage range of +/- 0.3V, allowing it to operate over a wide range of conditions.

Working Principle of the LM7812CT

The LM7812CT is a linear regulator, meaning that it works by regulating the output voltage via a constant current flowing through a series of resistors. The resistors form a voltage divider circuit, which is then compared to a reference voltage. This reference voltage is provided by an integrated bandgap reference circuit and acts as a set point for the output voltage of the regulator.When the input voltage is higher than the reference voltage, the LM7812CT will increase the current flow through the voltage divider, until the output voltage is equal to the reference voltage. If the input voltage is lower than the reference voltage, the LM7812CT will decrease the current flow to maintain the output voltage. This ensures that the output voltage remains constant, regardless of the load and input voltage.The LM7812CT also features a number of other features, including an internal current limit, thermal shutoff, power-on reset and short-circuit protection. These features allow the LM7812CT to provide a stable and reliable output voltage.

Conclusion

The LM7812CT is a three-terminal voltage regulator from the LM78XX series of integrated circuits that is used to provide a regulated voltage output of +12V. It is widely used in power supply circuits for providing stability and for protecting the ICs from transient overvoltages. The LM7812CT is a linear voltage regulator that works by regulating the output voltage via a constant current flowing through a series of resistors. It is also equipped with safety features such as a current limit, thermal shutoff, power-on reset, and short-circuit protection. Ultimately, the LM7812CT is an excellent choice for applications that require a reliable, low-voltage, low-current voltage regulator.

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