The basic principle of the three-terminal regulator adopts a series-type voltage regulator circuit. In the linear integrated voltage regulator, because the three-terminal voltage regulator has only three lead-out terminals, it has the advantages of fewer external components, convenient use, stable performance, and low price, so it is widely used. In the working process of the series-type regulated power supply circuit, the regulator tube is required to always be in an amplifying state. The current passing through the adjusting tube is equal to the load current, so an appropriate high-power tube must be selected as the adjusting tube, and a heat sink must be installed in accordance with the regulations. In order to prevent short circuit or long-term overload from burning the adjusting tube, the DC voltage stabilizer is generally equipped with short circuit protection and overload protection circuits. The purpose of the voltage regulator triode is to stabilize the voltage of the control board circuit. To prevent the circuit from being burnt due to excessive voltage.

? best suited to power supply for TTL,C(2)-MOS
? No external part needed
? Built-in thermal protective circuit
? Max.output current 150mA (T(j)=25oC)