L78L33ACD

L78L33ACD application field and working principle

The L78L33ACD is a three-terminal low-drop positive voltage regulator integrated monolithic circuit. It is able to deliver an output power of up to 1.5 A and is also capable of providing a fixed output voltage of 5 V and as low as 1.5 V. It has a wide operating temperature range between -40°C to 125°C, making it suitable for a variety of applications. The L78L33ACD is also designed with reverse current protection, thermal overload protection and over voltage protection, making it reliable and safe in use.

Application

The L78L33ACD is a popular alternative to the traditional 7805 voltage regulator due to its higher output power, wide operating temperature range and other protections. Consequently, it is ideal for various applications such as providing regulated power for micro controllers, computer peripherals, automotive electronics, consumer electronics etc. It can also be used in DC-DC converters and switching mode power supplies, among other applications.

Working Principle

The L78L33ACD operates by comparing the reference voltage with a feedback voltage, with the output voltage being determined by the differential between those two voltages. In the event that the output voltage begins to climb, it will be detected by the regulator and counteracted laterally by an internal control element. This will cause a comparative decrease in the output current, thus maintaining the output voltage in line with the reference voltage.

In order to provide a reliable and consistent voltage output, the L78L33ACD also features an over-voltage protection circuit that reduces the maximum output voltage and a reverse current protection circuit that prevents the internal components from damage due to reverse currents.

Conclusion

The L78L33ACD is a three-terminal low-drop positive voltage regulator integrated monolithic circuit, and is suitable for a variety of applications such as providing regulated power for micro controllers, computer peripherals, automotive electronics, consumer electronics etc. It also features reverse current protection, thermal overload protection, over voltage protection, as well as an over-voltage protection circuit and reverse current protection circuit, making it reliable and safe in use.