MC7805ABT

MC7805ABT Application Field and Working Principle

The MC7805ABT is a 5V Voltage regulator, belonging to the family of polyphase motor control ICs (PMIC) used for regulating voltage for a variety of applications. It falls under the category of linear voltage regulators, wherein the output from the regulator is dependent on the reference voltage applied.

The MC7805ABT has an enable pin (EN) which supports active low and active high voltage setup. The enable pin can be used to shut down the device when the low level signal is sent to it. This feature is useful in establishing an adjustable output range for an application. The maximum output current of the regulator is 1A and the minimum dropout voltage is 2V. The input voltage range of the regulator is 4.5V to 20V, with an output voltage of 5V.

The regulator has a maximum operating temperature range of 0℃ to 70℃. It is encapsulated in an 8-pin flatpack and is a space saving solution for applications that require a small footprint. This IC also has an on-chip thermal shutdown mechanism which protects it from excessive heat. It has good line and load regulation for accurate voltage regulation. It has an adjustable overvoltage protection mechanism which places maximum current to the load. The output voltage of the regulator can be adjusted between 5V and 8V by connecting the adjustment pin to a higher voltage value.

The working principle of the MC7805ABT regulator is based on the principle of voltage divider. The voltage divider circuit is a basic configuration of two or more resistors. It is used to adjust the output voltage by dividing the input source into two or more parts. The required output voltage is obtained by connecting a variable resistor in series between the input voltage source and the output voltage terminal. The output voltage is then set to the desired level by adjusting the variable resistor. This regulator is used for limiting the output voltage to a specific value. It can be used for a variety of applications such as motor control, lighting control and other power management processes.

In conclusion, the MC7805ABT Voltage Regulator is suited for a wide range of applications and provides efficient voltage regulation for a number of applications. The adjustable overvoltage protection feature of the regulator offers reliable circuit protection. The on-chip thermal shutdown mechanism and low dropout voltage ensures that the regulator can operate reliably even in high temperature environments. The small footprint and high input voltage range makes it an ideal choice for applications where space is limited.