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AN258 EP93xx Power-up and Reset Lockup
AN258 EP93xx Power-up and Reset Lockup

... Cirrus Logic, Inc. and its subsidiaries (“Cirrus”) believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied). Customers are advised to obtain ...
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... • The overshoot (or undershoot) occurs because of the surplus (or deficit) of charge in the output capacitor. • Let’s define the allowed variation for the output voltage as ∆Voreg • Because of slope constraints due to the inductor: when D < 0.5 the OVERSHOOT overshoot is greater than the undershoot ...
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... C parallel  C1  C 2 . Consider a parallel-plate capacitor of plate area A, whose gap is partly filled with a dielectric medium of dielectric constant  and partly filled with air, where the fraction of the gap filled with dielectric is f. This capacitor can be regarded as two capacitors in paralle ...
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... one week at 30°C or less and 60% RH or less.) If the Relay is left for a long time after opening the moisture-proof package, the appearance may suffer and seal failure may occur after the solder mounting process. To store the Relay after opening the moisture-proof package, place it into the original ...
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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