Patent ID: 11934217
Assignee: STMICROELECTRONICS RAZVOJ POLPREVODNIKOV D.O.O.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A linear voltage regulator comprising:
a first transistor coupled between a first input terminal and an output terminal, the first input terminal adapted to receive a first voltage, and the output terminal adapted to provide a regulated voltage;
a second transistor coupled between a second input terminal and the output terminal, the second input terminal adapted to receive a second voltage; and
an amplifier of a difference between a third voltage proportional to the regulated voltage at the output terminal and a reference voltage, an output of said amplifier being selectively coupled to a control terminal of the first transistor and to a control terminal of the second transistor, the amplifier being supplied by a fourth voltage corresponding to a highest voltage of the first voltage and the second voltage;
a comparator configured to: compare the first voltage and the second voltage, and control switches selectively coupling the first input terminal and the second input terminal to an output configured to provide the fourth voltage;
a first diode coupled between the first input terminal and a supply terminal of the comparator;
a second diode coupled between the second input terminal and the supply terminal of the comparator; and
a capacitor coupled between the supply terminal of the comparator and a supply node.