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On modeling of linear-assisted DC-DC voltage regulators

機(jī)譯:關(guān)于線性輔助DC-DC穩(wěn)壓器的建模

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摘要

This paper presents the modeling of linear-assisted DC-DC regulators. This kind of voltage regulators consists of a switching converter together with a classic or LDO (low dropout) linear voltage regulator. While the linear regulator provides the constant output voltage, the switching converter conducts nearly all the current provided in the output load, and keeping the regulator current close to zero where the higher efficiency is achieved. However, the circuit could be unstable due to some critical parameters such as parasitic output capacitance; as a consequence, the mathematical modeling is obtained to study and corroborate the stability of the whole system.
機(jī)譯:本文介紹了線性輔助DC-DC穩(wěn)壓器的建模。這種穩(wěn)壓器由開關(guān)轉(zhuǎn)換器和經(jīng)典或LDO(低壓差)線性穩(wěn)壓器組成。線性穩(wěn)壓器提供恒定的輸出電壓時(shí),開關(guān)轉(zhuǎn)換器幾乎傳導(dǎo)輸出負(fù)載中提供的所有電流,并使穩(wěn)壓器電流接近零,從而實(shí)現(xiàn)更高的效率。但是,由于某些關(guān)鍵參數(shù)(例如寄生輸出電容),電路可能不穩(wěn)定。結(jié)果,獲得了數(shù)學(xué)模型以研究和證實(shí)整個(gè)系統(tǒng)的穩(wěn)定性。

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