Monday, 3 June 2019

Current limiter with low voltage drop out


I am looking for way to limit the output current from a LDO (Vout = 5V) to max. 150mA. I found only this circuit
enter image description here


but the problem with this circuit is the voltage drop Vbe of the transistor Q1 and voltage drop across Rsense are too big. Using a Mosfet can solve the problem with Q1 but voltage across Rsense will still be big. Are there other kinds of circuits that I can look for limiting current while keeping load voltage > 4.9V?




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