As an integrated circuit along in the form of a voltage regulator small voltage drop with against overvoltages and - currents protected pnp - power transistor

摘要

a voltage regulator includes a schutzschaltung, the kollektorstrom a pnp power transistor (26) and the collector emitter voltage is recorded.the power and spannungssignale by a pnp hilfstransistor (28) generates the kollektorstrom proportional to that of the pnp power transistor (26), and a circuit (22, 25) between the emitter and collector of the pnp power transistor (26) is switched.if the values of the current and the voltage of predetermined maximum, which signals are processed by a circuit to the pnp power transistor (26) to reduce current flowing in so far that it is within predetermined bereichsgrenzen.the schutzschaltung did not affect the very small voltage drop between the input and output of the spannungsreglers. the circuit can in such a way that the maximum extension of the safe working area of the pnp power transistor (26) is possible.