The 3-terminal stabilizer switch regulator power supply circuit

Published:2011/7/24 3:41:00 Author:Seven | Keyword: 3-terminal stabilizer, switch regulator | From:SeekIC

The switch regulator power supply circuit formed by the 3-terminal stabilizer can be understood by the equivalent circuit. As some reasons, the output voltage falls down slightly, the distributed voltage V3 on R5 and R6 is also falls down, after being amplified by VT3, IC3 decreases, i.e the current past R1 and VD1 is falling down, which leads to the drop of V1 and rise of IC1, V4 is rising up after being distributed by R2 and R3, V2 is rising up with it, accordingly, V3 falls```



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