| 摘要 |
A low dropout regulator comprises an output transistor (MPOUT) with a controlled section coupled between a first supply terminal (VS) and an output terminal (OUT), and a differential amplifier that comprises a feedback input (VFB) coupled to the output terminal (OUT), a reference input (VR) for receiving a reference voltage, an output (DOUT) connected to a control terminal of the output transistor (MPOUT), and at least one pair of input transistors (M1, M2, M1a, M2a, M1b, M2b). The input transistors (M1, M2, M1a, M2a, M1b, M2b) of each pair are commonly connected to a tail current source (Iab, Ia, Ib) of the respective pair. A control terminal of a respective first transistor (M1, M1a, M1b) of each pair is connected to the reference input (VR). A control terminal of a respective second transistor (M2, M2a, M2b) of each pair is connected to the feedback input (VFB). A first capacitive element (C1) is coupled between the output terminal (OUT) and the common connection (S, Sa) of the input transistors (M1, M2, M1a, M2a, M1b, M2b) of one pair with their respective tail current source (Iab, Ia, Ib). A second capacitive element (C2) is coupled between a second supply terminal (GND) and the common connection (S, Sb) of the input transistors (M1, M2, M1a, M2a, M1b, M2b) of one pair with their respective tail current source (Iab, Ia, Ib). |
