Abstract: A low-dropout regulator circuit comprises a pass element (PE) between a supply terminal (VDD) and an output terminal (OUT) for providing an output voltage (vout). A control block (CB) is configured to control the pass element (PE) based on a difference between a feedback voltage (vfb) and a reference voltage (vref). The control block (CB) is configured to be selectively operated in a normal mode and in a low-supply mode depending on a selection signal (sel). In the normal mode the control block (CB) is configured to be operated with a first operating range (OR1), the first operating range (OR1) excluding a target output voltage, and in the low-supply mode the control block (CB) is configured to be operated with a second operating range (OR2), the second operating range (OR2) including the target output voltage and only partially overlapping with the first operating range (OR1).

Abstract: Buffer circuit for providing a floating reference signal, voltage generating circuit and method for providing a floating reference signal In one embodiment a buffer circuit for providing a floating reference signal comprises an operational amplifier comprising a first input, a second input, a third input and an output. The first input represents a non-inverting input and is configured to receive a first input signal. The second input represents another non-inverting input and is configured to receive a second input signal. The third input represents an inverting input. The output forms an output of the buffer circuit. The operational amplifier is configured as a voltage follower. The buffer circuit is configured to provide either the first or the second input signal at its output, such that a lower one of the first and the second input signal is provided as the floating reference signal.

Abstract: Low-dropout regulator circuit and electronic device A low-dropout regulator circuit comprises a pass element (PE) coupled between a supply terminal (VDD) and an output terminal (OUT) for providing an output voltage (vout). A control block (CB) is configured to control the pass element (PE) based on a difference between a feedback voltage (vfb), which is derived from the output voltage (vout), and a reference voltage (vref), which determines a target output voltage. The control block (CB) is configured to be selectively operated in a normal mode of operation and in a low-supply mode of operation depending on a selection signal (sel).