Output negative voltage circuit composed of W723

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Output negative voltage circuit composed of W723

As shown in the figure is a negative voltage output application circuit composed of W723 multi-terminal adjustable positive integrated regulator. The circuit shown adds a high-power transistor. The output of the regulator is connected to a Zener diode. The regulation value is between 6 and 7V. The voltage is related to the withstand voltage of the high-power transistor. Adjust the resistance value to adjust the output voltage value. The value of the anti-vibration capacitor can be selected from 100pF to 0.047μF. The resistance R5 connected between the transistors be is 2kΩ, and its function is to ensure startup.