Dialog Semiconductor Gmbh

Dialog Semiconductor (uk) Limited

Mahir Uka

Frank Kronmueller

Ambreesh Bhattad

Carlos Azevedo

Benedikt Wolf

A linear regulator which has a pass device coupled between an input voltage level and an output node, a voltage divider circuit for generating a feedback voltage that depends on an output voltage at the output node, and an operational amplifier for controlling the pass device, the operational amplifier receiving the feedback voltage and a reference voltage at its inputs is presented. The operational amplifier has: an input stage that receives the feedback voltage and the reference voltage at its inputs, an amplifier stage that receives an output of the input stage at its input, and a current injection circuit for sourcing current into an intermediate node between the input stage and the amplifier stage, or sinking a current from the intermediate node. The disclosure further relates to a corresponding method of operating a linear regulator.

Programmable two-way fast DVC control circuit

Multi-stage amplifiers, such as linear regulators or linear voltage regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients are presented. A multi-stage amplifier, having a differential amplification stage configured to provide a stage output voltage at an output node, based on a first input voltage and a second input voltage is presented. Furthermore, the multi-stage amplifier comprises a second amplification stage comprising an amplifier current source configured to provide an amplifier current; and an amplifier transistor arranged in series with the amplifier current source; wherein a gate of the amplifier transistor is coupled to the output node of the differential amplification stage. In addition, the multi-stage amplifier comprises a detection circuit.

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Ulm, Germany

Mahir Uka