variable voltage regulator

  1. U

    How to use transistor as a variable Regulator?

    I'm designing a variable power source from 5V to 30V with 600mA. Input voltage is VIN = 36V. I tried the below circuit. VREF is given from microcontroller DAC. I tried using N-MOSFET, P-MOSFET, NPN, PNP (with modifications). I set a the output voltage as 20V. This circuit works fine with no...
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