What is a three-terminal integrated voltage regulator and how to classify?

Last Update Time: 2018-12-14 15:01:07

The integrated voltage regulator has experienced the development process from small power multi-terminal to high-power three-terminal. The so-called three-terminal refers to the voltage input terminal, the voltage output terminal and the common ground terminal. The three-terminal integrated voltage regulator is divided into fixed output and adjustable output. The fixed output is divided into output positive and output negative regulators. The output is the output positive .


Domestic and foreign manufacturers have named this 7800 series, such as 7805, 7808. Of these, the number behind 78 represents the positive voltage value of the regulator output, in volts. For example, 7808 indicates that the output of the regulator is 8V. 7800 series voltage regulator is divided into 7805, 7808, 7809, 7810, 7812, 7815, 7818, 7824 according to the output voltage.


 According to the maximum current is divided into 78L00, 78M00 and 7800 three sub-series. The maximum output current of the 78L00 series is 100 mA; the maximum output current of the 78M00 series is 500mA; the maximum output current of 7800 series is 1.5 A.


Output negative voltage regulator, that is, the output voltage is negative voltage, named 7900 series. In addition to the different pin arrangement, the naming method, shape and parameters are the same as the 7800 series. The output voltage of the adjustable output voltage regulator can be adjusted by an external potentiometer, which is divided into positive voltage and negative voltage output, its main feature is the use of flexible and convenient.


Internationally, there is a positive output 117 series ( 217, 317 ), corresponding to the negative output 137 series ( 237.337 ). The output voltage is adjustable between 1.2 ~ 37V, and the output voltage is determined by two external resistors, and the output current is 1.5A.. The standard TO-220 plastic package is generally used.

 

This article is from ALLICDATA ELECTRONICS LIMITED


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