MC78L24ACPRPG

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Linear voltage regulators are devices used to provide a steady output voltage level created from an unregulated input signal. The MC78L24ACPRPG is a monolithic medium-power positive linear voltage regulator integrated circuit (IC) developed by ON Semiconductor. It is a three-terminal device available in two package types—an 8-pin plastic DIP and a Surface Mount Device (SMD). It is equipped with over-current protection and thermal shut down in order to protect itself against catastrophic failure under extreme conditions.

The MC78L24ACPRPG application field includes power supplies for consumer electronics, computers and telecommunication systems, medical equipment, and test and measurement instruments. This voltage regulator is well suited for moderate currents up to 100 mA, depending on the package and on the junction temperature. Also for applications requiring additional transient protection or short circuit protection, such as handheld devices and battery-operated applications, the MC78L24ACPRPG is a suitable option.

The MC78L24ACPRPG has a maximum input voltage of 40V, and a minimum output voltage of 24V and can produce a stabilized output voltage. Furthermore, the device is operational over the industrial -40°C to +125°C temperature range, ensuring reliable operation in most challenging environmental conditions. Also, it has a built-in impedance initiation circuit that prevents false triggering when the input voltage falls below ground or rises above the VIN + 0.3V.

The MC78L24ACPRPG working principle is based on the voltage regulation principle, which is the art of regulating the input voltage of a power supply to an output voltage. The device has two circuits, the main control circuit and the error amplifier. The main control circuit consists of a reference voltage source, an output voltage generator, a voltage divider and a current-limiting circuit. The output voltage generator monitors the voltage at the output and corrects the output voltage as necessary. The error amplifier compares the output voltage to the reference voltage and control the output voltage generator accordingly.

The output voltage can be adjusted by varying the reference voltage. The MC78L24ACPRPG output voltage can be programmed from the output of a potentiometer connected to the power supply. When the output voltage is lower than the input voltage, the second transistor is turned off and the output voltage is increased by the feedback loop. Inversely, when the output voltage is higher than the input voltage, the second transistor is turned on and the output voltage is decreased. Moreover, this IC features soft-start and over-voltage protection functions for a safe operation.

In summary, the MC78L24ACPRPG is the ideal voltage regulator choice for many types of applications requiring medium-power current regulation and is robust enough to help reduce time to market. Furthermore, this compact little IC offers excellent current and thermal stability, stable output voltage with low dropout, low output noise and short-circuit protection. As such, it is an ideal solution for many industries, including consumer electronics, computer, telecommunication and medical equipment.

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