Abstract: A bandgap voltage regulator includes a proportional-to-absolute-temperature (PTAT) circuit, an amplifier, and a driver circuit. The PTAT circuit can include various transistors that output a corresponding control voltage. The amplifier generates another control voltage to compensate base-current variations associated with the transistors of the PTAT circuit. The control voltage is generated by the amplifier based on the control voltage outputted by the PTAT circuit, and one of a base-emitter voltage associated with a transistor of the PTAT circuit, a scaled down version of the control voltage outputted by the amplifier, and a scaled down version of the base-emitter voltage. The driver circuit outputs, based on a supply voltage and the control voltages outputted by the PTAT circuit, a reference voltage for driving a functional circuit.

Abstract: A circuit includes a high voltage (HV) transistor having a first current electrode, a second current electrode, and a control electrode coupled to receive a control signal. The HV transistor is configured and arranged to be non-conductive when the control signal is at a first state and conductive when the control signal is at a second state. A low voltage (LV) transistor is coupled to the first current electrode of the HV transistor. An HV pad is coupled to the second current electrode of the HV transistor. An operating voltage rating of the HV pad exceeds an operating voltage rating of the LV transistor. A secondary electrostatic discharge protection device is coupled between the second current electrode of the HV transistor and a voltage supply terminal.

Abstract: A bandgap voltage reference and voltage regulator system includes a bandgap voltage reference circuit and a voltage regulator circuit that share a single, common amplifier. The amplifier acts as a gain stage for the reference circuit and as an error amplifier for a driver stage of the regulator circuit. The regulator circuit has an input reference generated by the reference circuit, and the reference circuit acts as a load to the driver stage, obviating the need for a bias resistance network. By sharing the amplifier and obviating the need for a resistance network, the area and overall quiescent current of the system are reduced. The system can be implemented in CMOS/BiCMOS technology and is suited for low power applications.

Abstract: A bandgap voltage reference and voltage regulator system includes a bandgap voltage reference circuit and a voltage regulator circuit that share a single, common amplifier. The amplifier acts as a gain stage for the reference circuit and as an error amplifier for a driver stage of the regulator circuit. The regulator circuit has an input reference generated by the reference circuit, and the reference circuit acts as a load to the driver stage, obviating the need for a bias resistance network. By sharing the amplifier and obviating the need for a resistance network, the area and overall quiescent current of the system are reduced. The system can be implemented in CMOS/BiCMOS technology and is suited for low power applications.

Abstract: A differential receiver circuit receives a differential input signal including first and second input signals (DP, DM) and generates a single-ended output signal. The receiver circuit includes first and second comparators that receive the differential input signal and generate respective first and second differential output signals. A current summer is connected to the first and second comparators and receives the first and second differential output signals and generates a third differential output signal. A differential to single-ended converter is connected to the current summer and receives the third differential output signal and generates the single-ended output signal. The differential input signal varies from a ground voltage level to an external reference voltage level (VUSB), while the first and second comparators are made with devices that operate at an internal reference voltage level that is lower than the external reference voltage level.

Abstract: A differential receiver circuit receives a differential input signal including first and second input signals (DP, DM) and generates a single-ended output signal. The receiver circuit includes first and second comparators that receive the differential input signal and generate respective first and second differential output signals. A current summer is connected to the first and second comparators and receives the first and second differential output signals and generates a third differential output signal. A differential to single-ended converter is connected to the current summer and receives the third differential output signal and generates the single-ended output signal. The differential input signal varies from a ground voltage level to an external reference voltage level (VUSB), while the first and second comparators are made with devices that operate at an internal reference voltage level that is lower than the external reference voltage level.

Abstract: A power management system for managing power in an integrated circuit includes a controller and a voltage generator. The controller generates a control signal based on one or more process corners of the integrated circuit. The voltage generator generates a supply voltage based on the control signal, and provides the supply voltage to the integrated circuit to manage the power within the integrated circuit.

Abstract: A regulated power source for supplying power to an external circuit includes a voltage sensing circuit and a voltage regulator. The voltage sensing circuit generates a feedback voltage by comparing voltage drops at a plurality of sense points within the external circuit. The feedback voltage is based on the maximum voltage drop at the sense points. The voltage regulator regulates the voltage supplied to the external circuit in accordance with the feedback voltage.

Abstract: A regulated power source for supplying power to an external circuit includes a voltage sensing circuit and a voltage regulator. The voltage sensing circuit generates a feedback voltage by comparing voltage drops at a plurality of sense points within the external circuit. The feedback voltage is based on the maximum voltage drop at the sense points. The voltage regulator regulates the voltage supplied to the external circuit in accordance with the feedback voltage.

Abstract: A low drop out voltage regulator (10) that receives an input voltage and generates a substantially constant output voltage includes a gain stage (12), a buffer stage (14), an output driver transistor (16), and first and second load current sense circuits (18, 20). The first load current sense circuit is connected between the output driver transistor and the buffer stage and adaptively increases a bias current of the buffer stage as a function of the load current. The second load current sense circuit is connected between the output driver transistor and the gain stage and adaptively decreases a bias current of the gain stage as the load current increases.

Abstract: A low drop out voltage regulator (10) that receives an input voltage and generates a substantially constant output voltage includes a gain stage (12), a buffer stage (14), an output driver transistor (16), and first and second load current sense circuits (18, 20). The first load current sense circuit is connected between the output driver transistor and the buffer stage and adaptively increases a bias current of the buffer stage as a function of the load current. The second load current sense circuit is connected between the output driver transistor and the gain stage and adaptively decreases a bias current of the gain stage as the load current increases.