Dialog Semiconductor has been granted a patent for an integrated user-programmable slew-rate controlled soft-start for a low-dropout regulator. The invention includes a current steering stage, integrator stage, and Miller compensation capacitor to control the output voltage’s rise during power up. GlobalData’s report on Dialog Semiconductor gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Dialog Semiconductor, was a key innovation area identified from patents. Dialog Semiconductor's grant share as of February 2024 was 72%. Grant share is based on the ratio of number of grants to total number of patents.
Integrated user programmable slew-rate controlled soft-start for low-dropout regulator
A recently granted patent (Publication Number: US11914409B2) discloses a low-dropout regulator designed to efficiently control the output voltage. The regulator includes a transconductor, a capacitor, and an error amplifier with a current digital-to-analog converter and slew rate configuration circuit. The error amplifier generates an input current during start-up to charge the capacitor, controlling the slew of the output voltage. Additionally, a pair of transistors in the error amplifier steer the tail current based on the feedback voltage and reference voltage, ensuring precise voltage regulation.
Furthermore, the patent details a method for controlling the slew rate of the output voltage during the power-up period of the regulator. By converting a digital code in the current digital-to-analog converter to form the tail current and steering it through transistors in the error amplifier, the capacitor is charged to regulate the output voltage's rise. The regulator also compensates using the capacitor during normal operation, enhancing its overall performance. The innovative design includes a Miller compensation capacitor with a unique composition, including a metal-insulator-metal capacitor, a MOSFET capacitor, and a varactor, further improving the regulator's efficiency and stability.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
